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Titolo:
Single-unit responses in the inferior colliculus of decerebrate cats I. Classification based on frequency response maps
Autore:
Ramachandran, R; Davis, KA; May, BJ;
Indirizzi:
Johns Hopkins Univ, Dept Otolaryngol HNS, Baltimore, MD 21205 USA Johns Hopkins Univ Baltimore MD USA 21205 ol HNS, Baltimore, MD 21205 USA Johns Hopkins Univ, Dept Biomed Engn, Baltimore, MD 21205 USA Johns Hopkins Univ Baltimore MD USA 21205 d Engn, Baltimore, MD 21205 USA Johns Hopkins Univ, Ctr Hearing & Balance, Baltimore, MD 21205 USA Johns Hopkins Univ Baltimore MD USA 21205 alance, Baltimore, MD 21205 USA
Titolo Testata:
JOURNAL OF NEUROPHYSIOLOGY
fascicolo: 1, volume: 82, anno: 1999,
pagine: 152 - 163
SICI:
0022-3077(199907)82:1<152:SRITIC>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
DORSAL COCHLEAR NUCLEUS; SUPERIOR OLIVARY COMPLEX; INTERAURAL TIME DELAYS; LATERAL LEMNISCUS; AUDITORY-CORTEX; BINAURAL INTERACTION; GABAERGIC PROJECTION; MEMBRANE-PROPERTIES; DISCHARGE PATTERNS; PERIPHERAL AXOTOMY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
86
Recensione:
Indirizzi per estratti:
Indirizzo: May, BJ Johns Hopkins Univ, Dept Otolaryngol HNS, 720 Rutland Ave,505 Traylor Res Bldg, Baltimore, MD 21205 USA Johns Hopkins Univ 720 Rutland Ave,505 Traylor Res Bldg Baltimore MD USA 21205
Citazione:
R. Ramachandran et al., "Single-unit responses in the inferior colliculus of decerebrate cats I. Classification based on frequency response maps", J NEUROPHYS, 82(1), 1999, pp. 152-163

Abstract

Single-unit responses in the inferior colliculus of decerebrate cats. I. Classification based on frequency response maps. J. Neurophysiol. 82. 152-163, 1999. This study proposes a classification system for neurons in the central nucleus of the inferior colliculus (ICC) that is based on excitation and inhibition patterns of single-unit responses in decerebrate cats. The decerebrate preparation allowed extensive characterization of physiological response types without the confounding effects of anesthesia. The tone-driven discharge rates of individual units were measured across a range of frequencies and levels to map excitatory and inhibitory response areas for contralateral monaural stimulation. The resulting frequency response maps can begrouped into the following three populations: type V maps exhibit a wide V-shaped excitatory area and no inhibition; type I maps show a more restricted I-shaped region of excitation that is flanked by inhibition at lower andhigher frequencies; and type O maps display an O-shaped island of excitation at low stimulus levels that is bounded by inhibition at higher levels. Units that produce a type V map typically have a low best frequency (BF: themost sensitive frequency), a low rate of spontaneous activity, and monotonic rate-level functions for both BF tones and broadband noise. Type I and type O units have BFs that span the cat's range of audible frequencies and high rates of spontaneous activity. Like type V units, type I units are excited by BF tones and noise at all levels, but their rate-level functions maybecome nonmonotonic at high levels. Type O units are inhibited by BF tonesand noise at high levels. The existence of distinct response types is consistent with a conceptual model in which the unit types receive dominant inputs from different sources and shows that these functionally segregated pathways are specialized to play complementary roles in the processing of auditory information.

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Documento generato il 27/09/20 alle ore 13:41:40