(from the article `nervous system, human`) ...the internal capsule and is a major constituent of the crus cerebri in the midbrain. As the fibres emerge from the pons, they form compact bundles ...
Found on
http://www.britannica.com/eb/a-z/p/137
This is the direct corticospinal tract. It arises in the primary motor cortex, as a bundling together of axons from the upper motor neurons. By the time it reaches the medulla, it contains a million or so fibres, 90% of which decussate (cross over) and travel down the contralateral (or 'crossed') lateral corticospinal tract of the spinal cord. The ...
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http://www.encyclo.co.uk/local/20438
A massive bundle of fibres originating from pyramidal cells of various sizes in the fifth layer of the precentral motor (area 4), the premotor area (area 6), and to a lesser extent from the postcentral gyrus. Cells of origin in area 4 include the gigantopyramidal cells of Betz. Fibres from these cortical regions descend through the internal capsule...
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http://www.encyclo.co.uk/local/20973
Type: Term Definitions: 1. an imprecisely defined term, generally used to describe axons from the cerebral cortex that enter the pyramid thereby representing all corticospinal fibers rostral to the pyramidal decussation; when the term is used to describe the lateral corticospinal tract, this entity should be designated as the crossed pyramidal trac...
Found on
http://www.medilexicon.com/medicaldictionary.php?t=92991
[
n] - any of the important nerve pathways on each side of the central nervous system that run from the sensorimotor areas of the cortex through the brainstem to motor neurons of the cranial nerve nuclei and the ventral horn of the spinal cord
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http://www.webdictionary.co.uk/definition.php?query=pyramidal%20tract
pyramidal motor system noun any of the important motor nerves on each side of the central nervous system that run from the sensorimotor areas of the cortex through the brainstem to motor neurons of the cranial nerve nuclei and the ventral ...
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https://www.encyclo.co.uk/local/20974
any of four tracts of descending motor fibers that extend in pairs down each side of the spinal column and function in voluntary movement.
Found on
https://www.infoplease.com/dictionary/pyramidal-tract
No exact match found.
