Posterolateral tract
Information about 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 |
| subject #185 762 | |
| Dorlands/Elsevier | t_15/12817084 |
Composition and path
It contains centrally projecting axons carrying discriminative pain information (location, intensity and quality), which enter the spinal column ascend or descend one or two spinal segments in this tract before penetrating the grey mater of the dorsal horn where they synapse on second-order neurons. The axons of these second-order neurons cross the midline and ascend in the anterolateral quadrant of the contralateral half of the spinal cord, where they join the spinothalamic tract. The second-order neurons ultimately synapse on neurons in the ventral posterior lateral nucleus (VPL) of the thalamus.It consists of fine fibers which do not receive their myelin sheaths until toward the close of fetal life.
In addition it contains great numbers of fine non-mylinated fibers derived mostly from the dorsal roots but partly endogenous in origin.
These fibers are intimately related to the substantia gelatinosa which is probably the terminal nucleus.
The non-mylinated 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.
Clinical significance
During a complete occlusion of the ventral artery of the spinal cord, it is the only tract spared along with the dorsal columns.Eponym
The tract of Lissauer was named after German neurologist Heinrich Lissauer (1861-1891).External links
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 As such, some of the information contained herein may be outdated.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. spinal chord is a thin, tubular bundle of nerves that is an extension of the central nervous system from the brain and is enclosed in and protected by the bony vertebral column.
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Latin}}}
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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The posterior column refers to the fasciculus gracilis and fasciculus cuneatus collectively.
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References
- Clinical Neuroanatomy Made Ridiculously Simple
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In anatomy and neurology, the dorsal root (or posterior root) is the afferent sensory root of a spinal nerve.
At the distal end of the dorsal root is the dorsal root ganglion, which contains the neuron cell bodies of the nerve fibres conveyed by the root.
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At the distal end of the dorsal root is the dorsal root ganglion, which contains the neuron cell bodies of the nerve fibres conveyed by the root.
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The spinothalamic tract is a sensory pathway originating in the spinal cord that transmits information about pain, temperature, itch and crude touch to the thalamus. The pathway decussates at the level of the spinal cord, rather than in the brainstem like the posterior
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For the computer game developer, see Thalamus Ltd.
The thalamus (from Greek θάλαμος = bedroom, chamber, IPA= /ˈθæləməs/) is a pair and symmetric part of the brain.
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fetus (or foetus, or fœtus) is a developing mammal or other viviparous vertebrate, after the embryonic stage and before birth. The plural is fetuses (foetuses, fœtuses) or, very rarely, foeti.
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In anatomy and neurology, the dorsal root (or posterior root) is the afferent sensory root of a spinal nerve.
At the distal end of the dorsal root is the dorsal root ganglion, which contains the neuron cell bodies of the nerve fibres conveyed by the root.
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At the distal end of the dorsal root is the dorsal root ganglion, which contains the neuron cell bodies of the nerve fibres conveyed by the root.
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The word endogenous means "arising from within", the opposite of exogenous.
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Biology
Endogenous substances are those that originate from within an organism, tissue, or cell [1] ...... Click the link for more information.
Substantia gelatinosa can refer to:
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- Substantia gelatinosa of Rolando (usually what is meant when "Substantia gelatinosa" is used by itself)
- Substantia gelatinosa centralis
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In human anatomy, the anterior spinal artery is the blood vessel that supplies the anterior portion of the spinal cord. It arises from branches of the vertebral arteries and is supplied by the anterior segmental medullary arteries, including the artery of Adamkiewicz, and courses
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The posterior column-medial lemniscus pathway is the sensory pathway responsible for transmitting fine touch and conscious proprioceptive information from the body to the cerebral cortex.
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Neurology is a branch of medicine dealing with disorders of the nervous system. Medical professionals (such as Biomedical Doctors and Physicians) specializing in the field of neurology are called neurologists
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Heinrich Lissauer (September 12, 1861 - September 21, 1891) was a German neurologist who was born in Neidenburg (today Nidzica, Poland). He studied at the Universities of Heidelberg, Berlin and Leipzig.
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NeuroNames is a system of nomenclature for the human and/or macaque brain.
It is maintained by the University of Washington and is a part of a tool called "BrainInfo". BrainInfo helps one identify structures in the brain.
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It is maintained by the University of Washington and is a part of a tool called "BrainInfo". BrainInfo helps one identify structures in the brain.
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Cornell University is a private university located in Ithaca, New York, USA. Its two medical campuses are in New York City and Education City, Qatar. The youngest member of the Ivy League, Cornell was founded in 1865 by Ezra Cornell and Andrew Dickson White as a coeducational,
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Public domain comprises the body of knowledge and innovation (especially creative works such as writing, art, music, and inventions) in relation to which no person or other legal entity can establish or maintain proprietary interests within a particular legal jurisdiction.
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Henry Gray's Anatomy of the Human Body (or Gray's Anatomy as it has commonly been shortened) is an English-language human anatomy textbook widely regarded as a classic work on the subject.
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Torso is an anatomical term for the central part of the many animal bodies (including that of the human) from which extend the neck and limbs. It is sometimes referred to as the trunk. The torso includes the thorax and abdomen.
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spinal chord is a thin, tubular bundle of nerves that is an extension of the central nervous system from the brain and is enclosed in and protected by the bony vertebral column.
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The term spinal nerve generally refers to the mixed spinal nerve, which is formed from the dorsal and ventral roots that come out of the spinal cord. The spinal nerve is the bit that passes out of the vertebrae through the intervertebral foramen.
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In anatomy and neurology, the dorsal root (or posterior root) is the afferent sensory root of a spinal nerve.
At the distal end of the dorsal root is the dorsal root ganglion, which contains the neuron cell bodies of the nerve fibres conveyed by the root.
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At the distal end of the dorsal root is the dorsal root ganglion, which contains the neuron cell bodies of the nerve fibres conveyed by the root.
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In anatomy and neurology, the dorsal root ganglion (or spinal ganglion) is a nodule on a dorsal root that contains cell bodies of neurons in afferent spinal nerves.
The axons of dorsal root ganglion neurons are known as afferents.
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The axons of dorsal root ganglion neurons are known as afferents.
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The posterior (or dorsal) branches (or divisions) of the spinal nerves are as a rule smaller than the anterior divisions.
They are directed backward, and, with the exceptions of those of the first cervical, the fourth and fifth sacral, and the coccygeal, divide into medial
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They are directed backward, and, with the exceptions of those of the first cervical, the fourth and fifth sacral, and the coccygeal, divide into medial
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In anatomy and neurology, the ventral root (or anterior root) is the efferent motor root of a spinal nerve.
At its distal end, the ventral root joins with the dorsal root to form a mixed spinal nerve.
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At its distal end, the ventral root joins with the dorsal root to form a mixed spinal nerve.
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The ventral ramus (anterior ramus, anterior branch, anterior divisions of the spinal nerves) supply the antero-lateral parts of the trunk, and the limbs; they are for the most part larger than the posterior divisions.
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The sympathetic trunk (sympathetic chain, gangliated cord) is a bundle of nerve fibers that runs from the base of the skull to the coccyx. There are two sympathetic trunks in the body, a right one and a left one.
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Rami communicans (plural rami communicantes) is the term used for a nerve which connects two other nervers.
When used without further definition, it almost always refers to a communicating branch between a spinal nerve and the sympathetic trunk.
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When used without further definition, it almost always refers to a communicating branch between a spinal nerve and the sympathetic trunk.
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Each spinal nerve receives a branch, gray ramus communicans, from the adjacent ganglion of the sympathetic trunk.
They contain unmyelinated postganglionic sympathetic fibers.
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They contain unmyelinated postganglionic sympathetic fibers.
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