anterior commissure


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Related to anterior commissure: Posterior commissure, Hippocampal commissure

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.
References in periodicals archive ?
Representative images of GFAP immunoreactivity in the corpus callosum and hippocampus of air- and CAPs-exposed male (A) and female (B) mice at PND14, with (C) relative quantification of GFAP in those regions and in the dentate gyrus, cortex, midbrain, striatum, and anterior commissure immediately adjacent.
Often individuals with ACC have some other much smaller interhemispheric connections (i.e., the anterior commissure).
Window anterior commissure relaxation laryngoplasty in the management of high-pitched voice disorders.
Allen and Gorsky reported that a structure known as the anterior commissure (a group of fibers interconnecting the temporal lobes and located near the hypothalamus) was larger in women and in homosexual men than in heterosexual men.
According to Julian Jaynes, the phenomenon of inspiration as the hearing of voices (of the Muses or of any other agency) is explained by the fact that the right hemisphere (parieto/temporal location corresponding to Wernicke's area) originates auditory signals which are transmitted to the left hemisphere's Wernicke's area through the anterior commissure. This explains why poetry, originally, was "sung," not crafted.
This time the anterior commissure, a cord of nerve fibers believed to allow the two halves of the brain to integrate sensory information, was reported to be larger in the cadavers of homosexually identified men than in the corpses of either presumed heterosexual men or of women whose sexual self-identification was unknown.
178-185) presented evidence that a thirteen-month-old "rubella-child" had "numerous defects of the cerebrum," including "agenesis of the corpus callosum and anterior commissure."
The contrast-enhanced computed tomography of larynx was performed if the lesion involved the anterior commissure or laryngeal ventricle or if there was a suspicion of paraglottic invasion.
The anterior vocal fold was then mobilized bilaterally, and an anterior glottic web was created to reconstitute an anterior commissure and functionally eliminate the anterior portions of her vocal fold that had resisted multiple surgical attempts at treatment and remained symptomatic.
The two vocal cords meet anteriorly and are attached to the inner surface of the thyroid cartilage at about the level of the thyroid prominence (Adam's apple) this attachment is called the anterior commissure, the space in between two vocal cords is known as 'rima glottis' this is the narroyest part of entire upper airway in adults.
The origin of the image (0, 0, 0 mm coordinates) was reoriented such that it was located close to the anterior commissure. Volume of interest (VOI) images of each patient were traced using MRIcron (http://www.mricro .com/mricron/).
Shell weakly concavoconvex to almost biplanate, transverse subrectangular with maximum width slightly anterior to the hinge line; anterior commissure rectimarginate.

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