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Commissure
(redirected from commissural)

   Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.01 sec.
commissure [′käm·ə‚shu̇r]
(biology)
A joint, seam, or closure line where two structures unite.

Commissure 

in human and animal anatomy, a site of union or junction.

The commisura labiorum oris is the junction of the lips at the corners of the mouth. The anterior commissure of the cerebrum is the transverse bundle of nerve fibers that unites the corpora striata of the forebrain in the majority of vertebrates. The anterior commissure of the mantle, or the commissura fornicis, joins the hemispheres of the forebrain in dipnoans and terrestrial vertebrates—the basis of the corpus callosum in mammals.



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In 1929, Pike and colleagues observed spontaneous hind limb recovery after spinal cord hemisection in cats and proposed that "the mechanism which takes over control of movements of the limb lying below the level of the lesion includes motor fibers coming down on the opposite side of the spinal cord, and commissural neurons lying in the spinal cord below the level of the lesion" [21].
Upon examination of the valves with scanning electron microscope, the endothelium forming the valves was found to be altered especially at the commissural localization.
 
 
 
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