Atlas of Human Anatomy in Cross Section: Section 1. Head and Neck

Plate 1.4

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Jean J. Jew, M.D., and Paul C. Reimann, B.S.
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In this section (looking down), the superficial temporal artery (13) is seen within the scalp on the right side and the middle meningeal artery (3) is seen superficial to the dura mater on the left side. Skull fracture may injure the middle meningeal artery, leading to its rupture and a life threatening collection of arterial blood in the epidural space (epidural hemorrhage). The coronal suture (15) is seen between the frontal and parietal bones. The galea aponeurotica (8), an epicranial aponeurosis sandwiched between the connective tissue and loose areolar tissue layers of the scalp, is seen posteriorly. A dural fold, the falx cerebri (6), is seen in the interhemispheric fissure. Within the falx cerebri, rostrally and caudally, is the superior sagittal sinus (7, 18). In the frontal lobe the superior (17) and middle (2) frontal gyri are seen separated by the superior frontal sulcus (1, 16). The precentral gyrus (14) of the frontal lobe is separated from the postcentral gyrus (12) of the parietal lobe by the central (rolandic) sulcus (5, 11). The precentral gyrus comprises the primary motor cortex, whereas the postcentral gyrus comprises the primary somatosensory (somesthetic) cortex. Caudal to the postcentral gyrus is the postcentral sulcus (10). The marginal sulcus (9) is seen on the medial surface of the parietal lobe. Subarachnoid (cerebrospinal fluid-containing) spaces (4) are seen within sulci (1) and over the surface of each hemisphere.

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