The anterior commissure is a bundle of axons that connect the hemispheres in one location across the middle of the brain. It is closely associated with the corpus callosum.
It connects the temporal lobes and also crossed olfactory fibers. It works in conjunction with the corpus callosum in intra-hemispheric communication.
Disease in the anterior commissure impairs olfactory and auditory intra-hemispheric transfer
MRI other neuroimaging techniques are used for diagnosis.
Treatment of anterior commissure dysfunction consists of surgery and radiation.
The posterior commissure is a rounded band of axons crossing the cerebral aqueduct.
The posterior commissure is responsible for controlling the pupillary response to light.
Disease results in abnormal pupillary response. It is also been found to have abnormalities in Parkinson’s disease and Niemann-Pick disease.
It is usually observed through MRI.
Treatments for the alleviation of symptoms and discomfort are medicinal and surgical.
|21731 brain fx mass dx metastasis dx melanoma MRI T1 sagittal Courtesy James Donnelly MD Uploaded RP|
Goetz: Textbook of Clinical Neurology. 2nd Edition. 2003