Abstract: An electrode for continuously stimulating a facial nerve root capable of a stable holding required for an electrode that continuously stimulates a facial nerve root, and an apparatus for monitoring electromyograms of facial muscles using the electrode for continuously stimulating the facial nerve root, are provided. The electrode for continuously stimulating the facial nerve root comprises an electrode unit, a contact unit, a guard unit, an extension unit, and a wire unit. The electrode for continuously stimulating the facial nerve root is held by clamping the extension unit between the facial nerve root and the anterior inferior cerebellar artery or the small artery so that the contact unit closely contacts to the facial nerve root and is fixed.

Abstract: An antenna holder for navigation surgery is provided to be used for a navigation surgery to a subject portion including a temporal bone region and a lateral skull base region of a patient. The antenna holder for navigation surgery comprises a mouth gag (an antenna holder) which is attached to a mouth of the patient and maintains the mouth of the patient opened, and an attachment arm which holds an antenna used for measuring a specific position of the subject portion.

Abstract: A novel monitoring electrode for monitoring dorsal cochlear nucleus action potentials is provided, which has a superior performance in accuracy, adherent property, comprehensiveness, recording sensitivity, and recording specificity. The monitoring electrode is easily inserted through a foramen of Luschka, stably held on a region of the dorsal cochlear nucleus, and clearly records the dorsal cochlear nucleus action potentials. Additionally, a novel monitoring device for monitoring the dorsal cochlear nucleus action potentials using the monitoring electrode thereof is provided.

Abstract: An antenna holder for navigation surgery is provided to be used for a navigation surgery to a subject portion including a temporal bone region and a lateral skull base region of a patient. The antenna holder for navigation surgery comprises a mouth gag (an antenna holder) which is attached to a mouth of the patient and maintains the mouth of the patient opened, and an attachment arm which holds an antenna used for measuring a specific position of the subject portion.

Abstract: An electrode for continuously stimulating a facial nerve root capable of a stable holding required for an electrode that continuously stimulates a facial nerve root, and an apparatus for monitoring electromyograms of facial muscles using the electrode for continuously stimulating the facial nerve root, are provided. The electrode for continuously stimulating the facial nerve root comprises an electrode unit, a contact unit, a guard unit, an extension unit, and a wire unit. The electrode for continuously stimulating the facial nerve root is held by clamping the extension unit between the facial nerve root and the anterior inferior cerebellar artery or the small artery so that the contact unit closely contacts to the facial nerve root and is fixed.

Abstract: A novel monitoring electrode for monitoring dorsal cochlear nucleus action potentials is provided, which has a superior performance in accuracy, adherent property, comprehensiveness, recording sensitivity, and recording specificity. The monitoring electrode is easily inserted through a foramen of Luschka, stably held on a region of the dorsal cochlear nucleus, and clearly records the dorsal cochlear nucleus action potentials. Additionally, a novel monitoring device for monitoring the dorsal cochlear nucleus action potentials using the monitoring electrode thereof is provided.