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Titolo:
Discharge properties of single neurons in the dorsal nucleus of the lateral lemniscus of the rat
Autore:
Bajo, VM; Villa, AEP; de Ribaupierre, F; Rouiller, EM;
Indirizzi:
Univ Lausanne, Inst Physiol, Lausanne, Switzerland Univ Lausanne Lausanne Switzerland Inst Physiol, Lausanne, Switzerland Univ Salamanca, Dept Biol Celular & Patol, Salamanca, Spain Univ Salamanca Salamanca Spain t Biol Celular & Patol, Salamanca, Spain Univ Fribourg, Inst Physiol, CH-1700 Fribourg, Switzerland Univ Fribourg Fribourg Switzerland CH-1700 CH-1700 Fribourg, Switzerland
Titolo Testata:
BRAIN RESEARCH BULLETIN
fascicolo: 6, volume: 47, anno: 1998,
pagine: 595 - 610
SICI:
0361-9230(199812)47:6<595:DPOSNI>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
MEDIAL GENICULATE-BODY; SUPERIOR OLIVARY COMPLEX; STEM AUDITORY NUCLEI; KAINIC ACID LESIONS; VITRO BRAIN SLICE; POSTEROVENTRAL COCHLEAR NUCLEUS; BINAURAL EVOKED-RESPONSES; UNIT EXCITATORY RESPONSES; BATS INFERIOR COLLICULUS; RUFOUS HORSESHOE BAT;
Keywords:
auditory physiology; brain stem; extracellular single unit recording; spontaneous activity; acoustic stimulation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
93
Recensione:
Indirizzi per estratti:
Indirizzo: Bajo, VM Univiguelmanca, Dept Biol Celular & Patol, C Alfonso X & Sabio S-N Campus M Univ Salamanca C Alfonso X & Sabio S-N Campus Miguel de Unamuno Salamanca Spain
Citazione:
V.M. Bajo et al., "Discharge properties of single neurons in the dorsal nucleus of the lateral lemniscus of the rat", BRAIN RES B, 47(6), 1998, pp. 595-610

Abstract

The aim of the present study was to characterize the discharge properties of single neurons in the dorsal nucleus of the lateral lemniscus (DNLL) of the rat. In the absence of acoustic stimulation, two types of spontaneous discharge patterns were observed: units tended to fire in a bursting or in anonbursting mode. The distribution of units in the DNLL based on spontaneous firing rate followed a rostrocaudal gradient: units with high spontaneous rates were most commonly located in the rostral part of the DNLL, whereasin the caudal part units had lower spontaneous discharge rates. The most common response pattern of DNLL units to 200 ms binaural noise bursts contained a prominent onset response followed by a lower but steady-state response and an inhibitory response in the early-off period. Thresholds of response to noise bursts were on average higher for DNLL units than for units recorded in the inferior colliculus under the same experimental conditions. TheDNLL units were arranged according to a mediolateral sensitivity gradient with the lowest threshold units in the most lateral part of the nucleus, Inthe rat, as in other mammals, the most common DNLL binaural input type wasan excitatory response to contralateral ear stimulation and inhibitory response to ipsilateral ear stimulation (El type). Pure tone bursts were in general a more effective stimulus compared to noise bursts. Best frequency (BF) was established for 97 DNLL units and plotted according to their spatiallocation. The DNLL exhibits a loose tonotopic organization, where there isa concentric pattern with high BF units located in the most dorsal and ventral parts of the DNLL and lower BF units in the middle part of the nucleus. (C) 1999 Elsevier Science Inc.

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Documento generato il 22/10/20 alle ore 02:45:27