[Cochlear nerve injuries caused by manipulations in cerebellopontine angle: Part I. Electrophysiological and morphological study in dogs].
Cochlear nerve injuries caused by manipulations in the cerebellopontine angle were electrophysiologically and morphologically investigated using dogs. Compression injuries were developed at the portions of the cochlear nerves that were directly retracted by a retractor. The blood vessels supplying the cochlear nerve trunk easily ruptured and the Schwann-glial junctions of the cochlear nerve were separated, due to traction force derived from the manipulations in the CP angle. From these results, some technical points to preserve hearing during CP angle surgery were discussed.
Sekiya
T
T
University of Pittsburgh School of Medicine, Pennsylvania.
Møller
A R
AR
Jannetta
P J
PJ
D000200:Action Potentials; D000818:Animals; D001933:Brain Stem / Q000503:physiopathology; D002530:Cerebellopontine Angle / Q000601:surgery*; D003056:Cochlear Nerve / Q000098:blood supply / Q000293:injuries* / Q000503:physiopathology; D004285:Dogs; D005072:Evoked Potentials, Auditory; D008854:Microscopy, Electron; D009408:Nerve Compression Syndromes / Q000209:etiology / Q000473:pathology / Q000503:physiopathology