anterior commissure

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commissure

 [kom´ĭ-shūr]
1. a site of union of corresponding parts, such as the angle of the lips or eyelids.
2. the site of junction between adjacent cusps of a cardiac valve.
anterior commissure the band of fibers connecting the parts of the two cerebral hemispheres.
commissure of epithalamus a large fiber bundle that crosses the midline of the epithalamus just dorsal to the point where the cerebral aqueduct opens into the third ventricle.
middle commissure a band of gray matter joining the optic thalami; it develops as a secondary adhesion and may be absent.
posterior commissure commissure of epithalamus.

an·te·ri·or com·mis·sure

[TA]
a round bundle of nerve fibers that crosses the midline of the brain near the anterior limit of the third ventricle. It consists of a smaller anterior part (pars anterior commissurae anterioris [TA]), the fibers of which pass in part to the olfactory bulbs, and a larger posterior part (pars posterior commissurae anterioris [TA]), which interconnects the left and right temporal lobes.
Synonym(s): commissura anterior [TA]

anterior commissure

The anterior ligamentous attachment of the true vocal cords to the thyroid cartilage, which, because it lacks an internal perichondrium, is a common site of extension of squamous cell carcinomas from the anterior commissure.

an·te·ri·or com·mis·sure

(an-tēr'ē-ŏr kŏm'i-shŭr) [TA]
A round bundle of nerve fibers that crosses the midline of the brain near the anterior limit of the third ventricle. It consists of a smaller anterior part, the fibers of which pass in part to the olfactory bulbs, and a larger posterior part, which interconnects the left and right temporal lobes.
Synonym(s): precommissure.
[L. commissura anterior]

anterior commissure

A nerve fibre bundle running across the midline of the brain from one hemisphere to the other, just in front of the THIRD VENTRICLE.