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

Anatomy Atlases(tm) : A digital library of anatomy information

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

Plate 1.3

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Jean J. Jew, M.D., and Paul C. Reimann, B.S.
Peer Review Status: Externally Peer Reviewed

Upper Left Quadrant	Lower Left Quadrant	Lower Right Quadrant	Upper Right Quadrant
1. Scalp 2. Calvarium 3. Dura mater 4. Precentral gyrus	5. Central (rolandic) sulcus 6. Postcentral gyrus 7. Subarachnoid space 8. Marginal sulcus 9. Falx cerebri	10. Superior parietal lobule 11. Postcentral gyrus 12. Central (rolandic) sulcus	13. Precentral gyrus 14. Superior frontal sulcus 15. Superior frontal gyrus 16. Superior sagittal sinus

In this section, the following protective coverings of the brain are seen: scalp (1), calvarium (2), and dura mater (3). A dural fold, the falx cerebri (9), is seen within the interhemispheric fissure. A dural venous sinus within the falx cerebri, the superior sagittal sinus (16), is seen. Two gyri within the frontal lobe are seen: the superior frontal gyrus (15) and the precentral gyrus (4, 13). The superior frontal sulcus (14) delineates the boundary of the superior frontal gyrus. Within the precentral gyrus (4, 13) is the primary motor area of the brain. The central (rolandic) sulcus (5, 12) separates the precentral gyrus (4, 13) from the postcentral gyrus (6, 11). The postcentral gyrus is located in the parietal lobe and represents the primary somatosensory (somesthetic) cortex. The superior parietal lobule ( 10) is seen caudal to the postcentral gyrus. The marginal sulcus (8), a branch of the cingulate sulcus, is seen on the medial surface of the parietal lobe. Subarachnoid spaces (7) containing cerebrospinal fluid fill the sulcal spaces between cortical gyri.

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