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Encyclopedia > Posterolateral tract
Posterolateral tract
Diagram showing a few of the connections of afferent (sensory) fibers of the posterior root with the efferent fibers from the ventral column and with the various long ascending fasciculi. (Lissauer's fasciculus visible in upper left.)
Diagram of the principal fasciculi of the spinal cord. (Lissauer's fasciculus visible in upper right.)
Latin t. posterolateralis
Gray's subject #185 762
Dorlands/Elsevier t_15/12817084

The posterolateral tract (fasciculus of Lissauer, tract of Lissauer, dorsolateral fasciculus) is a small strand situated in relation to the tip of the posterior column close to the entrance of the posterior nerve roots. Image File history File links Gray669. ... Image File history File links Gray672. ... The Spinal cord nested in the vertebral column. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... Elseviers logo Elsevier, the worlds largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. ... In anatomy and neurology, the dorsal root (or posterior root) is the afferent sensory root of a spinal nerve. ...


It consists of fine fibers which do not receive their medullary sheaths until toward the close of fetal life. Fetus at eight weeks A fetus (alternatively foetus or fœtus) is an embryo in later stages of development, from the third month of pregnancy until birth in humans. ...


It is usually regarded as being formed by some of the fibers of the posterior nerve roots, which ascend for a short distance in the tract and then enter the posterior column, but since its fibers are myelinated later than those of the posterior nerve roots, and do not undergo degeneration in locomotor ataxia, they are probably intersegmental in character. The posterior horn (posterior column, posterior cornu, dorsal horn) of the spinal cord is dorsal (more towards the back) to the anterior horn. ... Myelin is an electrically insulating phospholipid layer that surrounds the axons of many neurons. ... Tabes dorsalis (also called locomotor ataxia) is a late form of syphilis resulting in a degeneration of the dorsal columns of the spinal cord and marked by shooting pains, emaciation, loss of muscular coordination (resulting in the wide-based unsteady gait characteristic of the disease), and disturbances of sensation and...


In addition it contains great numbers of fine non-medullated fibers derived mostly from the dorsal roots but partly endogenous in origin. In anatomy and neurology, the dorsal root (or posterior root) is the afferent sensory root of a spinal nerve. ... In an economic model, an endogenous change is one that comes from inside the model and is explained by the model itself. ...


These fibers are intimately related to the substantia gelatinosa which is probably the terminal nucleus. Substantia gelatinosa can refer to: Substantia gelatinosa of Rolando Substantia gelatinosa centralis This is a disambiguation page: a list of articles associated with the same title. ...


The non-medullated fibers ascend or descend for short distances not exceeding one or two segments, but most of them enter the substantia gelatinosa at or near the level of their origin.


This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body, commonly known as Grays Anatomy, is an anatomy textbook widely regarded as a classic work on human anatomy. ...

Spinal cord

epidural space, dura mater, subdural space, arachnoid mater, subarachnoid space, pia mater, denticulate ligaments, conus medullaris, cauda equina, filum terminale, cervical enlargement, lumbar enlargement, anterior median fissure, dorsal root, dorsal root ganglion, dorsal ramus, ventral root, ventral ramus, sympathetic trunk, gray ramus communicans, white ramus communicans The Spinal cord nested in the vertebral column. ... The epidural space is a part of the human spine which is very close to the spinal cord, lying just outside the dura mater. ... The dura mater (from the Latin hard mother), or pachymeninx, is the tough and inflexible outermost of the three layers of the meninges surrounding the brain. ... The Cavum Subdurale (subdural space) is an artificial space created by the separation of the arachnoid mater from the dura mater as the result of trauma or pathologic process. ... The Arachnoid mater is one of the three layers of the meninges, interposed between the dura mater and the pia mater and separated from the pia mater by the subarachnoid space. ... The meninges (singular meninx) are the system of membranes that contain the brain. ... [www. ... The pia mater has 21 pairs of denticulate ligaments which attach it to the arachnoid and dura maters. ... The conus medullaris is the terminal end of the spinal cord. ... The cauda equina is a structure within the lower end of the spinal column, that consists of nerve roots and rootlets from above. ... The spinal cord is a part of the vertebrate nervous system that is enclosed in and protected by the vertebral column (it passes through the spinal canal). ... The cervical enlargement corresponds with the attachments of the large nerves which supply the upper limbs. ... The lumbar enlargement (or lumbosacral enlargement) gives attachment to the nerves which supply the lower limbs. ... Anterior median fissure can refer to: Anterior median fissure of the spinal cord Anterior median fissure of the medulla oblongata Category: ... penis ... This is a dorsal root ganglion (DRG) from a chicken embryo (around stage of day 7) after incubation overnight in NGF growth medium stained with anti-neurofilament antibody. ... The posterior (or dorsal) branches (or divisions) of the spinal nerves are as a rule smaller than the anterior divisions. ... In anatomy and neurology, the ventral root is the efferent motor root of a spinal nerve. ... This article belongs in one or more categories. ... The sympathetic trunk (sympathetic chain, gangliated cord) is a bundle of nerve fibers that runs from the base of the skull to the coccyx. ... Each spinal nerve receives a branch, gray ramus communicans, from the adjacent ganglion of the sympathetic trunk. ... The thoracic, and the first and second lumbar nerves each contribute a branch, white ramus communicans to the adjoining sympathetic ganglion. ...


grey matter: central canal, substantia gelatinosa of Rolando, reticular formation, substantia gelatinosa centralis, interneuron, anterior horn, lateral horn, posterior horn (column of Clarke, dorsal spinocerebellar tract) Grey matter is a major component of the central nervous system, consisting of nerve cell bodies and short nerve cell extensions/processes (axons and dendrites). ... Cross-section through cervical spinal cord. ... The apex of the posterior column is capped by a V-shaped or crescentic mass of translucent, gelatinous neuroglia, termed the substantia gelatinosa of Rolando (or gelatinous substance of posterior horn of spinal cord), which contains both neuroglia cells, and small nerve cells. ... Reticular formation is a part of the brain which is involved in stereotypical actions, such as walking, sleeping, and lying down. ... Throughout the cervical and thoracic regions the central canal is situated in the anterior third of the medulla spinalis; in the lumbar enlargement it is near the middle, and in the conus medullaris it approaches the posterior surface. ... An interneuron (also called relay neuron or association neuron) is a neuron that communicates only to other neurons. ... The anterior horn of the spinal cord (or anterior cornu, or anterior column) is the ventral (front) grey matter section of the spinal cord. ... In the thoracic region, the postero-lateral part of the anterior column projects lateralward as a triangular field, which is named the lateral column (lateral cornu, lateral horn). ... The posterior horn of the spinal cord is dorsal(more towards the back) to the anterior horn. ... The dorsal nucleus (column of Clarke, Clarkes columns, posterior thoracic nucleus) occupies the medial part of the base of the posterior column, and appears on the transverse section as a well-defined oval area. ... The dorsal spinocerebellar tract (posterior spinocerebellar tract, Flechsigs fasciculus, Flechsigs tract) conveys proprioceptive information from the body to the cerebellum. ...


white matter: anterior funiculus: descending (anterior corticospinal tract, vestibulospinal fasciculus, tectospinal tract), ascending (anterior spinothalamic tract, anterior proper fasciculus) White matter is one of the two main solid components of the central nervous system. ... The most lateral of the bundles of the anterior nerve roots is generally taken as a dividing line which separates the antero-lateral region into two parts, viz. ... The anterior corticospinal tract (also called the direct pyramidal tract or anterior cerebrospinal fasciculus) is a small bundle of descending fibers that connect the cerebral cortex to the spinal cord. ... The vestibulospinal tract is one of the descending spinal tracts of the ventromedial pathway. ... The tectospinal tract is part of the indirect extrapyramidal tract and is responsible for coordinating head and eye movements, It is responsible for impulses that are motor. ... The spinothalamic tract is the sensory pathway in the body that transmits pain, temperature, itch and crude touch. ... The remaining fibers of the anterior funiculus constitute what is termed the anterior proper fasciculus (anterior basis bundle). ...


lateral funiculus: descending (lateral corticospinal tract, rubrospinal tract, olivospinal tract), ascending dorsal spinocerebellar tract, ventral spinocerebellar tract, spinothalamic tract, lateral spinothalamic tract, anterior spinothalamic tract, spinotectal tract, posterolateral tract, lateral proper fasciculus, medial longitudinal fasciculus The most lateral of the bundles of the anteior nerve roots is generally taken as a dividing line which separates the antero-lateral region into two parts, viz. ... The corticospinal or pyramidal tract is a massive collection of axons that travel between the cerebral cortex of the brain and the spinal cord. ... The rubrospinal tract is part of the indirect extra-pyramidal tract and is responsible for large muscle movement such as the arms and the legs. ... The olivospinal fasciculus (Helweg) arises in the vicinity of the inferior olivary nucleus in the medulla oblongata, and is seen only in the cervical region of the medulla spinalis, where it forms a small triangular area at the periphery, close to the most lateral of the anterior nerve roots. ... The dorsal spinocerebellar tract (posterior spinocerebellar tract, Flechsigs fasciculus, Flechsigs tract) conveys proprioceptive information from the body to the cerebellum. ... The ventral spinocerebellar tract conveys proprioceptive information from the body to the cerebellum. ... The spinothalamic tract is the sensory pathway in the body that transmits pain, temperature, itch and crude touch. ... The spinothalamic tract is the sensory pathway in the body that transmits pain, temperature, itch and crude touch. ... The spinothalamic tract is the sensory pathway in the body that transmits pain, temperature, itch and crude touch. ... The spinotectal tract (spinotectal fasciculus) is supposed to arise in the dorsal column and terminate in the inferior and superior colliculi. ... The lateral proper fasciculus (lateral basis bundle) constitutes the remainder of the lateral column, and is continuous in front with the anterior proper fasciculus. ... The medial longitudinal fasciculus (MLF) is a group of axons on each side of the brainstem, that carry information about the direction that the eyes should move. ...


posterior funiculus: fasciculus gracilis, fasciculus cuneatus, posterior proper fasciculus The portion of the medulla spinalis which lies between the posterolateral sulcus and the posterior median sulcus is named the posterior funiculus. ... The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ... The fasciculus cuneatus (tract of Burdach) is triangular on transverse section, and lies between the fasciculus gracilis and the posterior column, its base corresponding with the surface of the medulla spinalis. ... The posterior proper fasciculus (posterior ground bundle; posterior basis bundle) arises from cells in the posterior column; their axons bifurcate into ascending and descending branches which occupy the ventral part of the funiculus close to the gray column. ...


 
 

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