Anatomical Variations in the Pseudosylvian Fissure Morphology of Brachy-, Dolicho-, and Mesaticephalic Dogs

Abstract

The purpose of the study is the following: (1) to anatomically characterize the right and the left pseudosylvian fissure (Psf) morphology; (2) to determine Psf variations between both hemispheres and between the three considered groups; and (3) to understand how these variations may influence brain surgery for dogs. Also we sought to determine whether there are any potential differences between brachy- (B), dolicho- (D), and mesaticephalic (M) dogs. The present study considered 138 brain hemispheres (N=138) from 69 adult dog cadavers and used bregma craniometric point (b- the junction of coronal and sagittal cranial vault sutures) to characterize the Psf location on the superolateral brain surface. For statistical analysis, P values <0.05 were considered significant. The Psf was easily identified in all specimens at both hemispheres. Statistically significant differences for Psf width were registered between the groups, presenting M as the narrowest Psf regions. Fissure body length can be sorted in ascending order as D