Anterior commissure
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| Brain: Anterior commissure | ||
|---|---|---|
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| Coronal section of brain through anterior commissure. (Label for "anterior commissure" is on left, third from bottom.) | ||
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| The hypophysis cerebri in position. Shown in sagittal section. (Caption for anterior commissure is at center top.) | ||
| Latin | commissura anterior | |
| Gray's | subject #189 840 | |
| NeuroNames | hier-187 | |
| Dorlands/Elsevier | c_49/12251560 | |
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Overview
The Anterior Commissure (precommissure) is a bundle of white fibers, connecting the two cerebral hemispheres across the middle line, and placed in front of the columns of the fornix.
On a sagittal section, it is oval in shape, having a long vertical diameter that measures about 5 mm.
In 1991 brain studies performed by Laura Allen and Roger Gorsky of UCLA noted that the Anterior Commissure was found to be 1/3 larger in men with a homosexual orientation.[1]
Connections
Its fibers can be traced laterally and backwards on either side beneath the corpus striatum into the substance of the temporal lobe.
It serves in this way to connect the two temporal lobes, but it also contains decussating fibers from the olfactory tracts, and is a part of the neospinothalamic tract for pain.
See also
References
- ↑ LeVay S (1991). "A difference in hypothalamic structure between heterosexual and homosexual men". Science 253 (5023): 1034-7. PMID 1887219.
Additional images
 Superficial dissection of brain-stem. Lateral view. |
 Deep dissection of brain-stem. Lateral view. |
 Superficial dissection of brain-stem. Ventral view. |
 Mesal aspect of a brain sectioned in the median sagittal plane. |
 Median sagittal section of brain. |
External links
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
