Intraoperative Neuromonitoring of Oculomotoric Function during Supra- and Infratentorial Tumor Resections

For intraoperative monitoring of motor functions of the oculomotor (III), trochlear (IV) and abducens (VI) nerves usually electromyographic potentials of the musculus rectus inferior, rectus lateralis and obliquus superior are registered. This allows one to recognize not stimulated-induced neuronal activity, which can be an indicator of a functional or structural damage to the cranial nerves. Furthermore, selective electrical stimulation allows the identification of individual cranial nerves. Although intraoperative monitoring of electromyographic potentials of ocular muscles can decrease the probability of neur…