1. Anatomic specimen.
Anatomic specimen. Superior surface of the brain after removal of the pia-arachnoid and surface vasculature. Note the positions, alignments, and interrelationships among the gyri: superior frontal gyrus (1), middle frontal gyrus (2), precentral gyrus (4), postcentral gyrus (5), pars deflection (dashed curve), superior parietal lobule (large black S), inferior parietal lobule (I), and superior occipital gyrus (large O), and among the sulci: superior frontal sulcus (a), precentral sulcus (c), central sulcus (d), postcentral sulcus (e), including the medial parentheses (also e), pars marginalis (arrowheads), intraparietal sulcus (g), subparietal sulcus (small white s), parietooccipital sulcus (w), and intraoccipital sulcus (small o). Note the notch (arrow) in the precentral sulcus anterior to the hand-motor area, the sharp inscription of the central sulcus just medial to the knob (asterisks) of the hand-motor area, the medial positions of the pars marginalis, SPS and POS, the nesting of the pars deflection (dashed curve) between the pars marginalis (arrowheads) and the postcentral parenthesis (e) on each side, and the convergence of the posterior portions of the IPS toward the parasagittal line
Thomas P. Naidich et al. AJNR Am J Neuroradiol 2001;22:
©2001 by American Society of Neuroradiology