Functional role of the human inferior colliculus in binaural hearing

• Published in: Hearing research Vol. 165; no. 1; pp. 177 - 188
• Main Authors: Litovsky, Ruth Y., Fligor, Brian J., Tramo, Mark J.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.03.2002; Elsevier
• Subjects: Acoustic Stimulation; Adult; Binaural; Biological and medical sciences; Cerebral Hemorrhage - physiopathology; Cerebral Hemorrhage - psychology; Discrimination (Psychology); Ear - physiopathology; Ear and associated structures. Auditory pathways and centers. Hearing. Vocal organ. Phonation. Sound production. Echolocation; Evoked Potentials, Auditory, Brain Stem; Functional Laterality; Fundamental and applied biological sciences. Psychology; Hearing; Humans; Inferior Colliculi - blood supply; Inferior Colliculi - physiopathology; Inferior colliculus; Lesion; Localization; Male; Precedence; Psychophysics - methods; Reference Values; Sound Localization; Speech; Speech Intelligibility; Vertebrates: nervous system and sense organs; IC, inferior colliculus; HL, hearing level; BAEP, brainstem auditory evoked potential; Inferior colliculus; SPL, sound pressure level; SRT, speech reception threshold; ITD, interaural time difference; LL, lateral lemniscus; Speech; PE, precedence effect; JND, just noticeable difference; Lesion; Binaural; Precedence; Localization; SRM, spatial release from masking; Human; Stimulus localization; Central nervous system; Electrophysiology; Sound source; Binaural hearing; Acoustic stimulus; Colliculus inferior; Auditory evoked potential; Perception; Auditory pathway; Masking; Brain (vertebrata)

Psychophysical experiments were carried out in a rare case involving a 48 year old man (RJC) with a small traumatic hemorrhage of the right dorsal midbrain, including the inferior colliculus (IC). RJC had normal audiograms bilaterally, but there was a marked decrease in wave V amplitude on click-evo...