Abstract:OBJect Restoration of cranial nerve functions during acoustic neuroma (AN) surgery is crucial for good outcome. The effects of minimizing the injury period and maximizing the recuperation period were investigated in 89 patients who consecutively underwent retrosigmoid unilateral AN surgery. MetHODS Cochlear nerve and facial nerve functions were evaluated during AN surgery by use of continuous auditory evoked dorsal cochlear nucleus action potential monitoring and facial nerve root exit zone-elicited compound m… Show more
“…In the 2010s, a novel form of intraoperative monitoring for hearing function was developed, that is dorsal cochlear nucleus action potential (DNAP) monitoring. 5 In DNAP monitoring, the detection prove is set on the dorsal cochlear nucleus of the brainstem. The action potential of the dorsal cochlear nucleus will be detected by this prove.…”
“…In the 2010s, a novel form of intraoperative monitoring for hearing function was developed, that is dorsal cochlear nucleus action potential (DNAP) monitoring. 5 In DNAP monitoring, the detection prove is set on the dorsal cochlear nucleus of the brainstem. The action potential of the dorsal cochlear nucleus will be detected by this prove.…”
“…Regarding identification methods for nerves, the facial nerve was identified by the presence of facial muscle action potentials elicited by direct facial nerve fascicle stimulation at 0.1-0.2 mA. With regard to the cochlear nerve, we used our unique invention, electric stimuli elicited dorsal cochlear nucleus action potential (ESE-DNAP) monitor-ing, 16 to identify the specific direct connection of the specific nerve fascicle with the dorsal cochlear nucleus by intraoperative electrical stimulation at 0.2-0.4 mA (Video 1). Multifused CE-FIESTA, however, suggests that one low-intensity area is an artery (arrowheads).…”
Section: Verification Of Predicted Results By Dtt and Multifused Ce-fmentioning
By using a combination of DTT and multifused CE-FIESTA, the authors were able to increase the number of vestibular schwannoma patients for whom predicted results corresponded with the courses of both the facial and cochlear nerves, a result that has been considered difficult to achieve by use of a single modality only. Although the 3D image including these prediction results helped with comprehension of the 3D operative anatomy, the reliability of prediction remains to be established.
“…We measured human facial muscle contraction by electromyography in response to 10 repetitive EPS of facial nerves at 20 different currents in three human patients during intraoperative neurophysiological monitoring (Figures 6A and S6A). We calculated the peak-to-peak amplitude of the electromyogram (Figure S6B), a measure of muscle contraction (Amano et al, 2011;Nakatomi et al, 2015;Figures 6B-6D and S6C-S6F).…”
Section: Information Transmission Of Human Facial Muscle Contractionmentioning
Highlights d Intracellular variation is small, and intercellular variation is large d Intercellular variation can improve the information transmission of a tissue d Intercellular variation can increase the gradualness of the responses of a tissue
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