Anterior commissure
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At the time the article was created Azza Elgendy had no recorded disclosures.
View Azza Elgendy's current disclosuresAt the time the article was last revised Rohit Sharma had no financial relationships to ineligible companies to disclose.
View Rohit Sharma's current disclosuresThe anterior commissure (AC) is a transversely oriented commissural white matter tract that connects the two cerebral hemispheres along the midline. It is a very important anatomical landmark that connects different parts of the limbic system on both sides and plays a role in the interhemispheric transfer of visual, auditory, and olfactory information between temporal lobes 1. However, the role of the anterior commissure is not yet well understood.
Gross anatomy
The anterior commissure corresponds to a white matter tract almost completely surrounded by grey matter (the canal of Gratiolet) that crosses the midline just ventral to the supraoptic recess of the third ventricle and the columns of the fornix.
The anterior commissure is composed of two fascicles (or limbs or crura): an anterior fascicle and posterior fascicle 3. The anterior fascicle is smaller and passes from midline anteriorly to the orbitofrontal cortex 3. The posterior fascicle passes from midline posterolaterally between the putamen and globus pallidus, before then dividing into temporal and parieto-occipital divisions 3. The temporal division of the posterior fascicle ends in the amygdaloid nucleus of the temporal pole bilaterally 2.
See also
References
- 1. Wilde E, Bigler E, Haider J et al. Vulnerability of the Anterior Commissure in Moderate to Severe Pediatric Traumatic Brain Injury. J Child Neurol. 2006;21(9):769-76. doi:10.1177/08830738060210090201 - Pubmed
- 2. Peltier J, Verclytte S, Delmaire C, Pruvo J, Godefroy O, Le Gars D. Microsurgical Anatomy of the Temporal Stem: Clinical Relevance and Correlations with Diffusion Tensor Imaging Fiber Tracking. J Neurosurg. 2010;112(5):1033-8. doi:10.3171/2009.6.JNS08132 - Pubmed
- 3. Baudo M, Colombo E, Pérez M et al. Three-Dimensional Anatomy of the Anterior Commissure: A Tractography and Anatomical Study. World Neurosurg. 2022;159:e365-74. doi:10.1016/j.wneu.2021.12.059 - Pubmed
Incoming Links
- Commissural fibres of the brain
- Basal nucleus of Meynert
- Dysgenesis of the corpus callosum
- Sagittal stratum
- Optic chiasm
- Canal of Gratiolet
- Third ventricle
- Telencephalon
- Commissure (disambiguation)
- Cerebrum
- Hypothalamus
- Supplementary motor area
- Anterior commissure of the larynx
- Cavum septum pellucidum
- Fornix (brain)
- Rhombencephalosynapsis
- Axial plane for imaging of the brain
- Anterior commissure - posterior commissure line
- Medical abbreviations and acronyms (A)
- Lamina terminalis
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