The Neural Circuitry: Architecture and Function, a fiber dissection study.

The Neural Circuitry: Architecture and Function, a fiber dissection study.

World Neurosurg. 2019 Feb 01;:

Authors: Shah A, Goel A, Jhawar SS, Patil A, Rangnekar R, Goel A

Abstract
OBJECTIVE: White fiber dissection using a gyrus based approach was performed to study the various association, commissural and projection fiber bundles of the brain METHODS: Ten previously frozen and formalin-fixed cadaveric human brains were used. The fiber dissection techniques described by Klingler were adopted. The primary dissection tools used were thin handmade wooden spatulas, and curved metallic spatulas with tips of various sizes. The fibers were studied by the naked eye and with the use of magnification. The various fiber bundles were studied using a gyrus based approach. The dissection was carried out through each named gyrus and the fiber tracts encountered during the dissection were identified and their relation to other adjacent fiber bundles was studied.
RESULTS: Based on our dissections the white fibers of the brain have been divided architecturally into five groups- four horizontal groups and one vertical group. The four horizontal groups are the superficial, middle, deep and central groups. The association fibers constitute the superficial, middle and deep groups. The commissural fibers form the central group and the projection fibers form the vertical group. The course of the fiber bundles and their functional co-relation is discussed.
CONCLUSIONS: When planning surgical trajectory, knowledge of the location of white matter tracts is essential in order to help minimize post-operative deficits. Fiber dissection using the Klingler technique is useful in gaining an understanding of the complex three dimensional nature of these white matter tracts, and may provide a valuable resource in neurosurgical training.

PMID: 30716486 [PubMed - as supplied by publisher]

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