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Published on: May 23, 2017
The Connections of the Short Arcuate Fibers of the Frontal Lobe: An Anatomical Study
Abhidha Shah1, Sukhdeep Singh Jhawar1, Atul Goel2
1Department of Neurosurgery, K.E.M. Hospital and Seth G.S Medical College, Parel, Mumbai, Maharashtra, India.
Background:
We present the anatomy of the short arcuate fibers (SAF) of the brain. This anatomy is not very well depicted in literature.
Aim:
The aim was to study the connections of the short association fibers of the frontal lobe of the brain.
Material And Methods:
Five formalin-fixed frozen cadaveric brains were studied by using Klinger's method of white fiber dissection. The superficial gray matter was cored out and the connections of the SAF were studied. The SAF of each dissected frontal lobe were compared with the other specimens and the similarities and differences between them were recorded.
Results:
The SAF or the U fibers of the cerebral hemispheres have three distinct patterns of organization, namely, the intergyral fibers, the intragyral fibers, and the gyral-gyral linkages. The intergyral fibers are the deep connections of the SAF. The intragyral fibers and the gyral-gyral linkages are the superficial components of the SAF system. There were no significant differences found when comparing the right and left hemispheres. Constant gyral-gyral linkages were observed between the middle frontal gyrus and the precentral gyrus. The superior frontal gyrus apart from having connections with the middle frontal gyrus also had short arcuate connections with the precentral gyrus, the orbital gyri, and the inferior frontal gyrus.
Conclusions:
A study of the short association fibers gives an insight into the workings and connections of the cortical structures of the brain.
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