Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Defective auditory recognition after small hemorrhage in the inferior colliculi
Autore:
Johkura, K; Matsumoto, S; Hasegawa, O; Kuroiwa, Y;
Indirizzi:
YokohamaaCity Univ, Urafane Hosp, Dept Neurol, Minami Ku, Yokohama, Kanagaw Yokohama City Univ Yokohama Kanagawa Japan 232 nami Ku, Yokohama, Kanagaw Higashimatsudo Municipal Hosp, Dept Neurol, Matsudo, Chiba, Japan Higashimatsudo Municipal Hosp Matsudo Chiba Japan Matsudo, Chiba, Japan Yokohama City Univ, Sch Med, Dept Neurol, Yokohama, Kanagawa 232, Japan Yokohama City Univ Yokohama Kanagawa Japan 232 ohama, Kanagawa 232, Japan
Titolo Testata:
JOURNAL OF THE NEUROLOGICAL SCIENCES
fascicolo: 1, volume: 161, anno: 1998,
pagine: 91 - 96
SICI:
0022-510X(19981126)161:1<91:DARASH>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
MIDDLE-LATENCY RESPONSES; PURE WORD DEAFNESS; EVOKED-POTENTIALS; BRAIN-STEM; LESIONS; COMPONENTS; LOCALIZATION; AGNOSIA; CORTEX; HUMANS;
Keywords:
auditory agnosia; inferior colliculus; contusion; brainstem auditory evoked potential; middle latency auditory evoked potential;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Johkura, K Yokohama City Univ, Urafane Hosp, Dept Neurol, Minami Ku, 3-46 Urafune Cho, Yokohama City Univ 3-46 Urafune Cho Yokohama Kanagawa Japan 232
Citazione:
K. Johkura et al., "Defective auditory recognition after small hemorrhage in the inferior colliculi", J NEUR SCI, 161(1), 1998, pp. 91-96

Abstract

We report the case of a male patient with a traumatic small hemorrhage partially involving the bilateral inferior colliculi without evidence of a temporal lobe lesion. He was unable to comprehend spoken words although he hadintact speech production, reading and writing abilities. Comprehension of environmental sounds was also affected. Among the receptive musical abilities, discrimination of intensity, tone and rhythm were preserved, while recognition of melody was impaired. Audiometry showed normal thresholds for pure tone. Waves I-IV of brainstem auditory evokedpotentials were elicited normally, whereas the wave V was elicited with reduced amplitude and prolongedlatencies on both sides. The main component of middle latency auditory evokedpotentials, which is evoked over both hemispheres by monaural stimulation to either side in normal subjects, was elicited only over the hemisphere contralateral to the ear receiving stimulation. Our patient's auditory findings were similar to those usually found in generalized auditory agnosia. Auditory agnosia is usually considered as a sign of a bitemporal cortical orsubcortical disorder, but, in our patient, a brainstem disorder caused a disturbance of auditory recognition similar to auditory agnosia due to a bitemporal lesion. Our patient's auditory findings may belong to the category of a brainstem auditory-processing disorder brought on by a small hemorrhage in the inferior colliculi. In addition, the impairment in our patient implies that, in the neural processing of musical parameters, the decoding of intensity, tone and rhythm is accomplished at the level of inferior colliculus, whereas further cortical processing is necessary for the appropriate recognition of melody. (C) 1998 Elsevier Science BN. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 18:38:42