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Superior view of the skull base showing the orbit and orbital apex from a superior view

The orbit is opened from above. The trochlear and medial and lateral rectus muscles, and the relation of the skull base and CNs II-VI are also shown. (Source: Bardeleben K von, Haeckel H. Atlas of applied [topographical] human anatomy for students and practitioners. Only authorized English adaptation from the third German edition ... by J. Howell Evans. London: Rebman Limited; New York, Rebman Company, 1906. Edited by Dr. Douglas J Lanska. Public domain.)