title: Tectal plate gliomas. Part III: Apparent lack of auditory consequences of unilateral inferior collicular lesion due to localized glioma surgery.
abstract: The authors present one of their cases operated on for intrinsic tectal plate glioma. The complete resection of the right inferior colliculus (I.C.) had no apparent auditory consequences. The pre- and post-operative tonal and vocal auditory tests were normal. The brain-stem auditory evoked potentials (BAEPs) and middle latency potentials (MLPs) were recorded pre-, post- and intraoperatively. At the end of surgery all waves were present with a marked delay of wave V and a slight delay of the Pa component. The dichotic test showed a significant right ear extinction but admittedly much less important than expected. The role of inferior colliculus (I.C.) in hearing is discussed.
authors.affiliation: Department of Neurosurgery, Hospital Pierre Wertheimer of Lyon, France.
authors.forename: L
authors.initials: L
authors.lastname: Bognar
authors.forename: C
authors.initials: C
authors.lastname: Fischer
authors.forename: F
authors.initials: F
authors.lastname: Turjman
authors.forename: F
authors.initials: F
authors.lastname: Michel
authors.forename: E
authors.initials: E
authors.lastname: Villanyi
authors.forename: C
authors.initials: C
authors.lastname: Mottolese
authors.forename: J
authors.initials: J
authors.lastname: Guyotat
authors.forename: C
authors.initials: C
authors.lastname: Lapras
mesh_terms: D001254:Astrocytoma / Q000503:physiopathology / Q000601:surgery*; D001932:Brain Neoplasms / Q000503:physiopathology / Q000601:surgery*; D001933:Brain Stem / Q000503:physiopathology; D002648:Child; D004007:Dichotic Listening Tests; D004292:Dominance, Cerebral / Q000502:physiology; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology; D005260:Female; D006313:Hearing Loss, Central / Q000175:diagnosis / Q000503:physiopathology*; D006320:Hearing Tests; D006801:Humans; D007245:Inferior Colliculi / Q000503:physiopathology / Q000601:surgery*; D008279:Magnetic Resonance Imaging; D016343:Monitoring, Intraoperative; D011183:Postoperative Complications / Q000175:diagnosis / Q000503:physiopathology*; D011930:Reaction Time / Q000502:physiology; D003336:Tectum Mesencephali / Q000503:physiopathology / Q000601:surgery*