Functional development of the inferior colliculus (IQ and its relationship with the auditory brainstem response (ABR) in the tammar wallaby (Macropus eugenii)

Liu, Guang B. and Mark, Richard F. (2001) Functional development of the inferior colliculus (IQ and its relationship with the auditory brainstem response (ABR) in the tammar wallaby (Macropus eugenii). Hearing Research, 157 1-2: 112-123. doi:10.1016/S0378-5955(01)00289-1


Author Liu, Guang B.
Mark, Richard F.
Title Functional development of the inferior colliculus (IQ and its relationship with the auditory brainstem response (ABR) in the tammar wallaby (Macropus eugenii)
Journal name Hearing Research   Check publisher's open access policy
ISSN 0378-5955
1878-5891
Publication date 2001
Sub-type Article (original research)
DOI 10.1016/S0378-5955(01)00289-1
Volume 157
Issue 1-2
Start page 112
End page 123
Total pages 12
Editor Aage R. Moller
Place of publication Amsterdam , The Netherlands
Publisher Elsevier/North-Holland Biomedical Press
Collection year 2001
Language eng
Subject C1
270502 Neurobiology
730111 Hearing, vision, speech and their disorders
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 central IC 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.
Keyword Neurosciences
Otorhinolaryngology
Auditory Brainstem Response
Tammar Wallaby
Inferior Colliculus
Development
Evoked-potentials
Central Nucleus
Stem Responses
Tonotopic Organization
Neuronal Organization
Postnatal Maturation
Dasyurus-hallucatus
Cochlear Nucleus
Spiral Ganglion
Rhesus-monkey
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Physical Sciences Publications
 
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Created: Tue, 14 Aug 2007, 15:15:06 EST