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Titolo:
Functional development of the inferior colliculus (IQ and its relationshipwith the auditory brainstem response (ABR) in the tammar wallaby (Macropuseugenii)
Autore:
Liu, GB; Mark, RF;
Indirizzi:
Univ Queensland, Vis Touch & Hearing Res Ctr, St Lucia, Qld 4067, Australia Univ Queensland St Lucia Qld Australia 4067 St Lucia, Qld 4067, Australia Australian Natl Univ, Res Sch Biol Sci, Dev Neurobiol Grp, Canberra, ACT 2601, Australia Australian Natl Univ Canberra ACT Australia 2601 rra, ACT 2601, Australia
Titolo Testata:
HEARING RESEARCH
fascicolo: 1-2, volume: 157, anno: 2001,
pagine: 112 - 123
SICI:
0378-5955(200107)157:1-2<112:FDOTIC>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVOKED-POTENTIALS; CENTRAL NUCLEUS; STEM RESPONSES; TONOTOPIC ORGANIZATION; NEURONAL ORGANIZATION; POSTNATAL MATURATION; DASYURUS-HALLUCATUS; COCHLEAR NUCLEUS; SPIRAL GANGLION; RHESUS-MONKEY;
Keywords:
auditory brainstem response; tammar wallaby; inferior colliculus; development;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
71
Recensione:
Indirizzi per estratti:
Indirizzo: Liu, GB Univ Queensland, Vis Touch & Hearing Res Ctr, St Lucia, Qld 4067, Australia Univ Queensland St Lucia Qld Australia 4067 , Qld 4067, Australia
Citazione:
G.B. Liu e R.F. Mark, "Functional development of the inferior colliculus (IQ and its relationshipwith the auditory brainstem response (ABR) in the tammar wallaby (Macropuseugenii)", HEARING RES, 157(1-2), 2001, pp. 112-123

Abstract

To discover the developmental relationship between the auditory brainstem response (ABR) and the focal inferior colliculus (IC) response, 32 young tammar wallabies were used, by the application of simultaneous ABR and focal brainstem recordings, in response to acoustic clicks and tone bursts of seven frequencies. The ic or the tammar wallaby undergoes a rapid functional development from postnatal day (PND) 114 to 160. The earliest (PND 114) auditory evoked response was recorded from the rostral IC. With development, more caudal parts of the IC became functional until age about PND 127, when all parts of the IC were responsive to sound. Along a dorsoventral direction, the duration of the IC response decreased, the peak latency shortened, while the amplitude increased, reaching a maximum value at the central IC, then decreased. After PND 160, the best frequency (BF) of the ventral IC was the highest, with values between 12.5 and 16 kHz, the BF of the dorsal IC was the lowest, varying between 3.2 and 6.4 kHz, while the BF of the centralIC was between 6.4 and 12.5 kHz. Between PND 114 and 125, the IC response did not have temporal correlation with the ABR. Between PND 140 and 160, only the early components of the responses from the ventral and central IC correlated with the P4 waves of the ABR. After PND 160, responses recorded from different depths of the IC had a temporal correlation with the ABR. (C) 2001 Published by Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 10:34:57