Study of Anatomy Related to Microsurgery through Subtemporal Approach

Objective To observe and measure the anatomical structure related to microsurgery through the subtemporal approach to the middle incisural space. Methods Ten specimens of formalin-fixed cadaveric heads were dissected by simulating the subtemporal approach. The relationship among the targeted neurovascular structures was observed and measured, and the extent of exposure by this approach was described. Results The shortest distances from the zygomatic arch to the brain stem and the edge of tentorium incisura were (46.83±3.52)mm and (39.00±2.65)mm respectively. The distances from the edge of tentorium incisura to the trochlear nerve, the superior cerebellar artery, the posterior cerebral artery and the trigeminal ganglion were (1.90±0.55)mm, (5.12±2.20)mm, (3.28±1.67)mm and (0.80±0.20)mm respectively. A wider scope of expoure was obtained by cutting the tentorium. Conclusions The subtemporal approach has advantages such as shorter distance of operation, bigger straight visual angle,wider visual field and more simple maneuver.