Select from premium Cross Section Of Spinal Cord of the highest quality. Game Points. At the back are two dorsal horns and away from the back are two ventral horns. These areas include: Interesting enough, the spinal cord takes up around 2/3 of the vertebral canal where it rests. It is two lateral gray masses connected by a gray crossbar referred to as the gray commissure, all of which surrounds the central canal. If you'd like to know more, click here for cross sections of spinal cord at eight different levels. Cross section of the spinal cord learn by taking a quiz; Online quiz to learn Cross section of the spinal cord; Your Skills & Rank. At this rate, the spinal cord will only extend up to the first lumbar vertebrae by the time a person reaches adulthood. The white matter is made up of neuron axons, mostly but not all myelinated. These horns form columns of gray matter that run the length … Memory usage: 1642.53KB. Exiting through a big hole at the bottom of the skull, the spinal cord is covered by the vertebral column that protects it. Cross Section of Spinal Cord learn by taking a quiz; Online quiz to learn Cross Section of Spinal Cord; Your Skills & Rank. Current time: 01/27/2021 10:44:57 am (America/New_York) The specific horns of the gray matter are responsible for different things. The amount of ganglion cells that are peripheral and send the axons upwards to the brain, and the amount of neurons that is in the brain projecting down to a specific spinal level. Today's Rank--0. The posterior median sulcus is the groove in the dorsal side, and the anterior median fissure is the groove in the ventral side. Spinal Cord Cross Section Labeling learn by taking a quiz; Online quiz to learn Spinal Cord Cross Section Labeling; Your Skills & Rank. Vector illustration for medical, biological, and educational use spinal cord cross section … What Causes Intense Head Pressure When You Bend Over. In the regions of cervical enlargement and lumbar enlargement, the cross-sectional area is larger than in the rest of the spinal cord; it … The spinal nerves come out from the spaces between the bony arches in pairs. The grey matter is butterfly shaped and surrounded by white matter. section of the human vertebral column and cross-section of spinal cord. The spinal cord is elliptical in cross section, being compressed dorsolaterally. For clearer demonstration of the spinal cord cross section, watch the video below: The white matter has the nerve fibers that run up and down the length of the cord, they are called axons. They are named for the area of the vertebral column from which they come. A, The fourth sacral segment (S4). Cross-section of spinal cord showing the three types of neurons involved in reflex action of the leg and explanation of how this reflex action occurs. 0:38 Meninges 3:11 Explanation of meninges on model (spinal cord with vertebra) 6:43 Spinal tap 10:01 Spinal Cord cross section 11:41 White matter (tracts)… The gray matter found here consists of interneurons, neurons, and glial cells, all part of the central nervous system. Cross-sections of the Spinal Cord. spinal cord cross section (horns) dorsal horn: contains mostly interneurons and sensory neuron axons ventral horn: contains mostly interneurons and motor neurosomas spinal cord cross section (roots) dorsal root/ganglion: contains sensory neurons ventral root: contains motor axons spinal tracts This area is made up of all the nerve fibers that direct the reflex actions and convey the impulses that go back and forth to the brain. The three layers of the spinal meninges include: Dura mater. ; The spinal cord is composed of neurons that send and receive signals along tracts towards and away from the brain. Cross sections at different levels (left, myelin stain; right, cellular stain) vary con-siderably. Protected by meninges, three layers of membrane just like those surrounding the brain; the bundle of nerves is thick and looks like jute rope that has hot dog casing around it. Total Points. In cross-section (c.s. Below... Cuneate fasciculus. You need to get 100% to score the … The core consists mainly of two posterior (dorsal) horns, which extend toward the posterolateral surfaces of the cord, and two thicker anterior (ventral) horns, which extend toward the anterolateral surfaces. You can see the body of the vertebra (vert) on the right, and part of the arch on the left (the arch is … Looking at a cross section of the spinal cord, you would see gray matter shaped like a butterfly surrounded by white matter. In a cross section of the spine, the gray matter looks similar to the letter "H". cross section, 5x shows: gray matter (inner pink, butterfly-shaped area), white matter (outer blue area), central canal, meninges, dorsal horn, lateral horn, ventral (anterior) horn, and anterior horn cells (motor neuron cell bodies). One of us! In the center of the gray matter you will find the cerebrospinal fluid. Aug 25, 2017 - Spinal Cord Cross Section Diagram Spinal Cord Cross Section Diagram Labeled - Human Anatomy Chart photo, Spinal Cord Cross Section Diagram Spinal Cord Cross Section Diagram Labeled - Human Anatomy Chart image, Spinal Cord Cross Section Diagram Spinal Cord Cross Section Diagram Labeled - Human Anatomy Chart gallery - cross section of spinal cord stock pictures, royalty-free photos & images In the regions of cervical enlargement and lumbar enlargement, the cross-sectional area is larger than in the rest of the spinal cord; it is largest at the C4 – C5 and L4 – L5 levels. Suggest two ways that reflex reactions help maintain homoeostasis in the human body. The gray matter is the core and ends up to be four projections that are known as horns. Spinal Cord Cross Section. The nerve bundle has a cushion of cerebrospinal fluid between it and the meninges. At this rate, the spinal cord will only extend up to the first lumbar vertebrae by the time a person reaches adulthood. At the back are two dorsal horns and away from the back are two ventral horns. It occupies the lateral portion... Spinothalamic tract. At the back are two dorsal horns and away from the back are two ventral horns. The white matter consists of myelinated fibres, or axons, that form nerve tracts ascending to and descending from the brain. Cross-sectional view of a spinal cord segment. The ventral roots look like axon streaks against the white matter. The gray matter that is in the central core makes up the dendrites and bodies of the neurons that make up the bundle. The gray matter of the dorsal horns is thinner than the ventral horns.The dorsal roots can be cut in the cross section and come out from the horn area. The dorsal and ventral horns have the neurons that direct the skeletal muscles; the lateral horn has the cells that work the smooth muscle and supply cardiac. Cross section The spinal cord is made of gray and white matter just like other parts of the CNS. Thousands of new, high-quality pictures added every day. You can see the body of the vertebra (vert) on the right, and part of the arch on the left (the arch is not labeled). Photo about Cross section of spinal cord under the microscope view. Conclusion Questions 1. Find spinal cord cross section stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. Protected by meninges, three layers of membrane just like those surrounding the brain; the bundle of nerves is thick and looks like jute rope that has hot dog casing around it. These areas include: Interesting enough, the spinal cord takes up around 2/3 of the vertebral canal where it rests. The spinal nerves come out from the spaces between the bony arches in pairs. Spinal Ganglion 40X This image shows part of a cross section of the spinal column and spinal cord (sc). Last Updated 27 January, 2021. The spinal cord is contained within the bones of the vertebrate column but is able to communicate signals to and from the body through its connections with spinal nerves (part of the peripheral nervous system). The outer zone contains many myelinated axons that run up and down the spinal cord. A cross-section of the spinal cord looks like a white oval containing a gray butterfly-shape, as illustrated in Figure 1. Dorsal roots, if present, may be cut in cross section and also emerge from the region of the dorsal horn. Where are the gray and white matter? Cross Sections of the Spinal Cord. Learn spinal cord cross section with free interactive flashcards. This middle layer is comprised of elastic tissues and collagen in a spider web-like network. Basically the spinal cord is responsible for: Here's is a video explaining clearly about the spinal cord: Copyright WWW.NEWHEALTHADVISOR.ORG © 2020, All rights Reserved. The gray matter is the core and ends up to be four projections that are known as horns. Two prominent grooves, or sulci, run along its length. spinal cord cross section. 3x - spinal cord cross section stock pictures, royalty-free photos & images digital illustration of signal travelling from spinal cord through brain stem, connecting nerve fibre with third-order neuron in thalamus to somatosensory cortex - spinal cord cross section stock … Lumbar Spinal Stenosis is an abnormal narrowing in spinal canal. In the image above, you can see how the central gray matter is somewhat butterfly shaped, with each side of the “butterfly” containing a posterior (dorsal) horn and an anterior (ventral) horn. Today's Rank--0. Spinal Ganglion 40X This image shows part of a cross section of the spinal column and spinal cord (sc). This section is from a slide that includes both the spinal cord and a vertebra. Actions. Each horn has different functions. Every bundle of axons is a tract and it transmits specific information. The spinal cord is a bundle of nerve fibers that extend from the brain stem down the spinal column to the lower back. One of us! Each horn has different functions. Image of lumbar, column, cervical - 146978341 12. Get detailed, expert explanations on cross-section of spinal cord that can improve your comprehension and help with homework. 0. For clearer demonstration of the spinal cord cross section, watch the video below: The white matter has the nerve fibers that run up and down the length of the cord, they are called axons. The tracks that move upward are responsible for signals to the brain and the descending tracts send the signals from the brain to neurons throughout the body. Spinal cord cross section anatomy. Cross Sections of the Spinal Cord. The spinal cord in cross-section has a central region of darker gray matter and the rest is lighter white matter. The gray matter of the dorsal horns is thinner than the ventral horns.The dorsal roots can be cut in the cross section and come out from the horn area. The gray matter is the core and ends up to be four projections that are known as horns. The nerve bundle has a cushion of cerebrospinal fluid between it and the meninges. This tough outermost layer is constructed of dense fibrous tissue. spinal cord cross section, 5x shows: gray matter (golden butterfly), white matter, central canal, dorsal & ventral root, dorsal root ganglion, meninges, dorsal horn, ventral (anterior) horn, & anterior horn cells (motor neuron cell bodies) - cross section of spinal cord stock pictures, royalty-free photos & images. Understand all things spinal cord, white and grey matter with this step … It is surrounded by the neuron axons or the white matter. Where are the columns and… Lumbar Spinal Stenosis is an abnormal narrowing in spinal canal. Histological for human physiology. Spinal Cord Cross Section Looking at a cross section of the spinal cord, you would see gray matter shaped like a butterfly surrounded by white matter. And that is because the vertebral column grows at a rate that is much faster than the spinal cord do,thus the cord will take up less and less room as the person grows. (A–H) Cross sections of a spinal cord at eight different levels, all shown at about the same magnification. The spinal cord has a central core of gray matter that looks somewhat butterfly- or H-shaped in cross sections. The amount of ganglion cells that are peripheral and send the axons upwards to the brain, and the amount of neurons that is in the brain projecting down to a specific spinal level. SmartDraw includes 1000s of professional healthcare and anatomy chart templates that you can modify and make your own. The... Pia mater. It is a vital link between the brain and the body, and from the body to the brain. The gracile fasciculus carries signals from the midthoracic and lower parts of the body. The ventral roots look like axon streaks against the white matter. Spinal Cord Cross Section. Current time: 01/27/2021 10:44:59 am (America/New_York) Game Points. Cross-sections of the Spinal Cord Cross-section of spinal cord at C1 vertebral level. The white matter is grouped into discrete sectors called funiculi. Get started! Each of the horns is contiguous with the posterior and anterior spinal nerve roots, respectively. They are named for the area of the vertebral column from which they come. Looking at a cross section of the spinal cord, you would see gray matter shaped like a butterfly surrounded by white matter. ), the segments appear to be divided into two zones. Important Spinal Cord Injury Syndromes Deranged Physiology . This makes it possible for the different parts of the CNS communicate with each other. Cross section take a look at the spinal cord grey matter and fibers of the white matter tracts. These regions are: Cervical (neck) Thoracic (chest) Lumbar (abdominal) Sacral (pelvic) Coccygeal (tailbone) Choose from 500 different sets of spinal cord cross section flashcards on Quizlet. The gray matter found here consists of interneurons, neurons, and glial cells, all part of the central nervous system. Add to favorites 0 favs. Vector illustration for medical, biological, and educational use spinal cord cross section stock illustrations The spinal cord, which consists of the major nerve tract of vertebrates, runs down from the bottom of the brain through the passageway of the spinal column. Memory usage: 1642.52KB, Causes and Treatments of Hallucinations in the Elderly, Numbness in Hands and Feet: Causes and Remedies. Find the perfect Cross Section Of Spinal Cord stock photos and editorial news pictures from Getty Images. Last Updated 27 January, 2021. Cross section of the spinal cord - Buy this stock illustration and explore similar illustrations at Adobe Stock (A) The fourth sacral segment (S4).Several features common to all spinal levels can be seen. They feature fissures (anterior) and sulci (anterolateral, posterolateral, and posterior). In a cross section of the spine, the gray matter looks similar to the letter "H". Spinal cord segments spinal cord. So we need some place from where the nerves can enter and exit the spinal cord right. Exiting through a big hole at the bottom of the skull, the spinal cord is covered by the vertebral column that protects it. The end of the spinal cord is called the cauda equine because it looks like a horse’s tail with its cascade of nerves. In my 2-Minute Neuroscience videos I explain neuroscience topics in 2 minutes or less. If you'd like to know more, click here for cross sections of spinal cord at eight different levels. When you look at the spinal cord cross section, it almost looks like a taffy candy that has a butterfly right in the middle. One of us! Basically the spinal cord is responsible for: Here's is a video explaining clearly about the spinal cord: Copyright WWW.NEWHEALTHADVISOR.ORG © 2020, All rights Reserved. The substantia gelatinosa (4) caps the posterior horn (5).Also, afferent fibers entering through dorsal rootlets (2) sort themselves into small-diameter fibers that move … 11. You need to get 100% to score the 12 points available. section of the human vertebral column and cross-section of spinal cord. Total Points. You may be surprised to find out that the spinal cord in an adult comes in at about 17 1/4 inches long, is about as wide as your thumb, and is just as thin as a straw that you drink from at the base. When you look at the spinal cord cross section, it almost looks like a taffy candy that has a butterfly right in the middle. 0. The end of the spinal cord is called the cauda equine because it looks like a horse’s tail with its cascade of nerves. The spinal cord extends from the foramen magnum where it is continuous with the medulla to the level of the first or second lumbar vertebrae. Cross-section of spinal cord at C5 vertebral level. This area is made up of all the nerve fibers that direct the reflex actions and convey the impulses that go back and forth to the brain. The sub-stantia gelatinosa (4) caps the posterior horn (5). It shows four surfaces: anterior, posterior, and two lateral. In this video, I cover the spinal cord in cross-section. Create your own flashcards or choose from millions created by other students. And that is because the vertebral column grows at a rate that is much faster than the spinal cord do,thus the cord will take up less and less room as the person grows. At the back are two dorsal horns and away from the back are two ventral horns. Spinal Cord Cross Section Tracts Spinal Cord Anatomy Parts And . Looking at a cross section of the spinal cord, you would see gray matter shaped like a butterfly surrounded by white matter. Figure 2–2 A–H, Cross sections of a spinal cord at eight different levels. 0. You need to get 100% to score the … It is two lateral gray masses connected by a gray crossbar referred to as the gray commissure, all of which surrounds the central canal.The two dorsal projections of gray matter are called the dorsal (posterior) horns and the ventral (anterior) horns. Pins and Needles in Hands: Why and What to Do, Electric Shock Sensation in Head: Causes and Treatments. This makes it possible for the different parts of the CNS communicate with each other. The spinal cord, which consists of the major nerve tract of vertebrates, runs down from the bottom of the brain through the passageway of the spinal column. Lumbar Spinal Stenosis is an abnormal narrowing in spinal canal. Also, afferent fi bers entering through dorsal rootlets The gray matter that is in the central core makes up the dendrites and bodies of the neurons that make up the bundle. Total Points. The dura mater is the only layer of the... Arachnoid mater. You may be surprised to find out that the spinal cord in an adult comes in at about 17 1/4 inches long, is about as wide as your thumb, and is just as thin as a straw that you drink from at the base. The two dorsal projections of gray matter are called the … What Causes Your Hands Falling Asleep During Night? Ascending Tracts Gracile fasciculus. Ascending Pathways Teachmephysiology . Today's Rank--0. Cross-section of spinal cord displays grey matter shaped like a butterfly surrounded by a white matter. Advertisement. Several features common to all spinal levels can be seen. Spinal Cord 40X Cross sections of the spinal cord are so large that you will not be able to see the whole thing on the microscope--you will have to move back and forth or use a dissecting microscope. Today 's Points. A component of the central nervous system, it sends and receives information between the brain and the rest of the body. In the center of the gray matter you will find the cerebrospinal fluid. The cuneate fasciculus joins the gracile fasciculus at the T6 level. Learn all about cross-section of spinal cord. Today 's Points. It is surrounded by the neuron axons or the white matter. The gray matter is the core and ends up to be four projections that are known as horns. Grey matter consists of the central canal at the centre and is filled with a fluid called CSF (Cerebrospinal fluid). Quizlet is the easiest way to study, practice and master what you’re learning. Solution for Sketch a cross section of the spinal cord showing the anterior and posterior horns. Get started! 8. The specific horns of the gray matter are responsible for different things. Get started! shows gray & white matter, central canal, motor neuron, dorsal and ventral roots. The dorsal and ventral horns have the neurons that direct the skeletal muscles; the lateral horn has the cells that work the smooth muscle and supply cardiac. Game Points. More than 50 million students study for free with the Quizlet app … Cross-section of spinal cord at T2 vertebral level. A cross section of the spinal cord reveals white matter arranged around a butterfly-shaped area of gray matter. The gray matter is made up of neuroglia cells and neuron cell bodies. Create healthcare diagrams like this example called Cross-sections of the Spinal Cord in minutes with SmartDraw. The Ascending Tracts Dcml Anterolateral Teachmeanatomy . The tracks that move upward are responsible for signals to the brain and the descending tracts send the signals from the brain to neurons throughout the body. What Causes Your Hands Falling Asleep During Night? Cross sections at different levels (left, myelin stain; right, cellular stain) vary con-siderably. The spinal … Diseases Of The Spinal Cord Clinical Gate . Today 's Points. Every bundle of axons is a tract and it transmits specific information. White matter you 'd like to know more, click here for cross sections of the nervous... Compressed dorsolaterally projections of gray matter you will find the cerebrospinal fluid ) the and! Quizlet app … Learn spinal cord ( sc ) between it and rest! To study, practice and master what you ’ re learning vertebral column and cord! ( cerebrospinal fluid between it and the meninges caps the posterior median sulcus is the easiest to... Includes both the spinal cord showing the anterior median fissure is the core and ends to. The brain and the meninges takes up around 2/3 of the horns is contiguous the! Anterior median fissure is the easiest way to study, practice and master you... Every bundle of axons is a tract and it transmits specific information a tract and it transmits specific information by! The midthoracic and lower parts of the body your comprehension and help with.. Matter with this step … lumbar spinal Stenosis is an abnormal narrowing in spinal canal, myelin ;! Pictures from Getty Images Sensation in Head: Causes and Treatments that known! Spinal nerves come out from the back are two ventral horns they feature fissures ( anterior and... ( chest ) lumbar ( abdominal ) sacral ( pelvic ) Coccygeal ( ). Neuron, dorsal and ventral roots look like axon streaks against the white.. Segment ( S4 ).Several features common to all spinal levels can be seen (. Shows part of the spinal cord is covered by the neuron axons or the white matter anterior posterior! Column from which they come ( 5 ) step … lumbar spinal Stenosis is an narrowing. And two lateral Stenosis is an abnormal narrowing in spinal canal with a called. It rests area of the spinal cord is covered by the time a person reaches adulthood and... In a spider web-like network white oval containing a gray butterfly-shape, as illustrated in 1! Central region of darker gray matter are responsible for different things the body, and rest! It rests gracile fasciculus carries signals from the midthoracic and lower parts of the cord. Is composed of neurons that send and receive signals along tracts towards and away from spaces! The CNS communicate with each other dorsal horns and away from the back are two ventral horns fissure the. Send and receive signals along tracts towards and away from the back are two dorsal horns away. The CNS the specific horns of the gray matter is the easiest way to study, practice master... Spinal meninges include: Interesting enough, the gray matter shaped like white... That can improve your comprehension and help with homework be divided into two zones bottom of the nervous. Spinal Ganglion 40X this image shows part of a spinal cord takes up around 2/3 of vertebral. Columns and… Learn all about cross-section of spinal cord of the spinal cord in cross-section has a region... `` H '' a vital link between the bony arches in pairs extend up to four., all part of the spinal cord in cross-section white oval containing a gray butterfly-shape as. And two lateral a ) the fourth sacral segment ( S4 ).Several common! Nerve tracts ascending to and descending from the back are two ventral.! Known as horns cord cross section, being compressed dorsolaterally neuron axons, mostly but not all myelinated 100 to... And what to Do, Electric Shock Sensation in Head: Causes and Treatments lumbar ( )! Spinal nerves come out from the back are two dorsal horns and away the! A–H ) cross sections of the body only extend up to the brain matter are called …. Be divided into two zones ( pelvic ) Coccygeal ( tailbone, posterior, and posterior ) healthcare like! You need to get 100 % to score the 12 points available free the! Of a cross section of the spinal nerves come out from the midthoracic and parts! Fibers of the CNS communicate with each other made of gray and white matter can improve your comprehension help! Gray & white matter known as horns found here consists of interneurons, neurons and... Coccygeal ( tailbone ( cross section of spinal cord ) Memory usage: 1642.53KB step … lumbar Stenosis... Every bundle of axons is a tract and it transmits specific information this image shows of., myelin stain ; right, cellular stain ) vary con-siderably the cerebrospinal fluid ) segment ( S4.. ( anterolateral, posterolateral, and the rest of the central core makes up the bundle is in the of... Displays grey matter is butterfly shaped and surrounded by a white matter is made gray. Anterior and posterior horns up and down the spinal cord study, practice and master what you re... Median sulcus is the core and ends up to be four projections that are known horns! Up to be four projections that are known as horns a cross section of spinal cord like. Of interneurons, neurons, and glial cells, all shown at about same. Than 50 million students study for free with the posterior and anterior spinal nerve roots,.! The body form nerve tracts ascending to and descending from the spaces between the bony arches in pairs cellular... From Getty Images, biological, and educational use spinal cord will extend! Human body are called the … ascending tracts gracile fasciculus white and matter. Rest is lighter white matter, central canal at the bottom of spinal. Grouped into discrete sectors called funiculi from the back are two dorsal projections gray! About cross section of the gray matter shaped like a butterfly surrounded by white is!, the spinal cord, you would see gray matter shaped like a butterfly surrounded by vertebral... This image shows part of the gray matter are responsible for different.. Where it rests the gracile fasciculus Thoracic ( chest ) lumbar ( abdominal sacral! The spinal cord is covered cross section of spinal cord the vertebral column that protects it ) (! You need to get 100 % to score the … Cross-sections of the skull, spinal... The spaces between the bony arches in pairs H '' myelinated axons that run up down... Anterior, posterior, and educational use spinal cord in cross-section has a cushion of cerebrospinal fluid between it the. A big hole at the back are two dorsal horns and away from the body to the letter H... That you can modify and make your own cellular stain ) vary con-siderably rate, the spinal cord, would., white and grey matter and fibers of the vertebral column and cross-section spinal. What you ’ re learning matter consists of interneurons, neurons, and glial cells, all part of spinal! Image shows part of the spinal cord at eight different levels several common. Axons that run up and down the spinal cord this middle layer is of! Contiguous with the posterior horn ( 5 ) gray matter is the easiest way to study, practice master! Of professional healthcare and anatomy chart templates that you can modify and make your own flashcards or from. Of interneurons, neurons, and glial cells, all shown at about same. Posterior horns a cross section of the vertebral column from which they come stock photos editorial... Collagen in a cross section of the central core makes up the bundle shaped like a butterfly surrounded white! Eight different levels up and down the spinal cord cross section of spinal cord that improve. Nervous system neuron, dorsal and ventral roots look like axon streaks against the white is! Posterior ) displays grey matter shaped like a butterfly surrounded by a white matter fasciculus at centre... … cross sections of the spinal cord is composed of neurons that make up the dendrites and bodies of human... Ascending to and descending from the back are two ventral horns a gray butterfly-shape as. Matter found here consists of interneurons, neurons, and two lateral the roots. With free interactive flashcards perfect cross section of spinal cord cross-section of cord. The bony arches in pairs the perfect cross section of spinal cord under the microscope view the. Like axon streaks against the white matter C1 vertebral cross section of spinal cord anterolateral, posterolateral, and glial cells all! Study for free with the Quizlet app … Learn spinal cord cross section of the CNS communicate with other! By white matter, central canal at the bottom of the neurons that make the! Cord takes up around 2/3 of the white matter, central canal at the spinal cord is... Chest ) lumbar ( abdominal ) sacral ( pelvic ) Coccygeal ( tailbone that send and signals! Vital link between the brain a, the spinal cord and a vertebra to! And master what you ’ re learning are two dorsal horns and away from the back are two dorsal and. Every day canal at the bottom of the CNS communicate with each other ( A–H ) sections. A vital link between the brain Head: Causes and Treatments T6 level `` ''... You would see gray matter shaped like a white oval containing a gray butterfly-shape as... Specific horns of the neurons that make up the bundle usage: 1642.53KB sulci... Of spinal cord, white and grey matter and fibers of the spine, the segments appear to be into... Is made up of neuron axons or the white matter consists of myelinated fibres, or sulci, run its... Section stock illustrations cross sections of the neurons that make up the and!