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Titolo:
PROJECTIONS FROM THE SUPERIOR OLIVE AND LATERAL LEMNISCUS TO TONOTOPIC REGIONS OF THE RATS INFERIOR COLLICULUS
Autore:
KELLY JB; LISCUM A; VANADEL B; ITO M;
Indirizzi:
CARLETON UNIV,INST NEUROSCI,LAB SENSORY SCI,329 LIFE SCI BLDG,1125 COLONEL DR OTTAWA ON K1S 5B6 CANADA
Titolo Testata:
Hearing research
fascicolo: 1-2, volume: 116, anno: 1998,
pagine: 43 - 54
SICI:
0378-5955(1998)116:1-2<43:PFTSOA>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
VITRO BRAIN SLICE; RUFOUS HORSESHOE BAT; DORSAL NUCLEUS; RESPONSE PROPERTIES; ASCENDING PROJECTIONS; EFFERENT PROJECTIONS; ECHOLOCATING BAT; COCHLEAR NUCLEUS; AUDITORY-SYSTEM; SINGLE NEURONS;
Keywords:
AUDITORY SYSTEM; SOUND FREQUENCY; RETROGRADE TRANSPORT; LATERAL LEMNISCUS; SUPERIOR OLIVARY COMPLEX; INFERIOR COLLICULUS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
79
Recensione:
Indirizzi per estratti:
Citazione:
J.B. Kelly et al., "PROJECTIONS FROM THE SUPERIOR OLIVE AND LATERAL LEMNISCUS TO TONOTOPIC REGIONS OF THE RATS INFERIOR COLLICULUS", Hearing research, 116(1-2), 1998, pp. 43-54

Abstract

The projections to physiologically defined tonotopic regions of the central nucleus of the inferior colliculus (ICC) from the adult rat's superior olivary complex (SOC) and lateral lemniscus were investigated using retrograde tract tracing methods. Iontophoretic injections of the retrograde tracers; Fluoro-Gold (FG) or-horseradish peroxidase (HRP), were made into the ICC through a glass micropipette, which also served as a recording electrode to determine the frequency response at theinjection site. Injections were made into frequency-specific regions based on the best responses of neurons to contralaterally presented tones between 2-25 kHz. In the dorsal nucleus of the lateral lemniscus (DNLL) neurons were labeled both ipsilaterally and contralaterally to the injection site with a larger proportion pi-ejecting to the contralateral side. Th-distribution of labeled cells was concentric, with highfrequencies represented along the outer margin and low frequencies represented centrally within DNLL. The lateral superior olive (LSO) was labeled bilaterally, with high frequencies represented medially and low frequencies laterally along the nuclear axis. The projection from the medial superior olive (MSG) was ipsilateral, with high frequencies represented ventrally and low frequencies dorsally. The projection fromthe superior paraolivary nucleus (SPN) was also largely ipsilateral, with high frequencies represented medially and low frequencies laterally. The intermediate and ventral nuclei of the lateral lemniscus (INLLand VNLL) were also labeled ipsilaterally and exhibited a distribution of tracer that depended on the frequency of the injection site: the low frequency projection was banded but the high frequency projection was more evenly distributed. (C) 1998 Elsevier Science B.V.

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Documento generato il 30/10/20 alle ore 09:52:44