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  • Title: Intraoperative electrooculographic monitoring of oculomotor nerve function during skull base surgery. Technical note.
    Author: Fukaya C, Katayama Y, Kasai M, Kurihara J, Yamamoto T.
    Journal: J Neurosurg; 1999 Jul; 91(1):157-9. PubMed ID: 10389898.
    Abstract:
    Intraoperative monitoring techniques for protecting the integrity of the oculomotor nerves during skull base surgery have been reported by several investigators, all of which involved the use of electromyographic responses to extraocular muscles. However, these techniques have not yet become popular because of the complexity of the procedures. The authors report an extremely simple and far more reliable technique in which electrooculographic (EOG) monitoring is used. The oculomotor nerves were stimulated with a monopolar electrode during skull base exposure. The polarity of the EOG responses recorded with surface electrodes placed on the skin around the eyeball yielded precise information concerning the location and function of the oculomotor and abducent nerves. In addition, with the aid of continuous EOG monitoring that detected transient changes in the background waves, surgical procedures that might impinge on oculomotor nerve function could be avoided. The present technique has been used in eight patients with skull base tumors and with it, the authors have achieved excellent results.
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