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 ?
Abbreviations: AC = anterior commissure, ACA = anterior cerebral artery, ahPCG = arm-hand region of precentral gyrus, BRRC = Brain Rehabilitation Research Center, CIMT = constraint-induced movement therapy, CT = computed tomography, DTT = diffusion tensor tractographic, fMRI = functional magnetic resonance imaging, MAL = Motor Activity Log, MCA = middle cerebral artery, MRI = magnetic resonance imaging, PC = posterior commissure, PVWM = periventricular white matter, SD = standard deviation, UL = upper limb, VA = Department of Veterans Affairs.
5-cm lesion Browning et al, 1992 (7) Erythema and edema from vocal cord to anterior commissure Isaacson and Frable, 1996 (6) Bilateral edematous and erythematous vocal cords, exudative white vocal cord lesion McGregor et al, 2003 Verrucose vocal cord lesion Series (ref.
This is consistent with reports of the treatment of squamous cell cancer of the vocal fold; if the vocal fold is sufficiently exposed and a surgical margin of at least 3 mm can be achieved without invading the anterior commissure, C[O.
Shell strongly dorsibiconvex, about 80% as long as wide; anterior commissure weakly uniplicate; ventral muscle field large, subcordate, slightly elongated, extending anterior to the midvalve and bisected by long median ridge terminating at about one third valve length from the anterior margin; dorsal interior with undivided cardinal process with a broad shaft on a high notothyrial platform; brachiophores stout, divergent at about right angle; dorsal median ridge terminated at about middle of a weakly impressed dorsal adductor muscle field.
Laryngoscopic view was graded according to the method described by Cormack and Lehane (12) as grade 1 (full view of the glottis), grade 2 (glottis partly exposed, anterior commissure not seen), grade 3 (only epiglottis seen), or grade 4 (epiglottis not seen).
The data closely emulates specialized regions of the human cortex, corpus callosum, anterior commissure, amygdale and hippocampus.
Flexible laryngoscopy detected the presence of a granular glottic mass at the anterior commissure of the larynx.
The larvae of Chinese Late Ordovician cornulitids were presumably attached to the shells of living brachiopods and had a commensal relationship with their host because of their common orientation and location near the brachiopod anterior commissure.

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