Temporal resolution of the Florida manatee (Trichechus manatus latirostris) auditory system.

Authors :: Mann DA
Colbert DE
Gaspard JC
Casper BM
Cook ML
Reep RL
Bauer GB
Source :: Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology [J Comp Physiol A Neuroethol Sens Neural Behav Physiol] 2005 Oct; Vol. 191 (10), pp. 903-8. Date of Electronic Publication: 2005 Sep 29.
Publication Year :: 2005
Abstract: Auditory evoked potential (AEP) measurements of two Florida manatees (Trichechus manatus latirostris) were measured in response to amplitude modulated tones. The AEP measurements showed weak responses to test stimuli from 4 kHz to 40 kHz. The manatee modulation rate transfer function (MRTF) is maximally sensitive to 150 and 600 Hz amplitude modulation (AM) rates. The 600 Hz AM rate is midway between the AM sensitivities of terrestrial mammals (chinchillas, gerbils, and humans) (80-150 Hz) and dolphins (1,000-1,200 Hz). Audiograms estimated from the input-output functions of the EPs greatly underestimate behavioral hearing thresholds measured in two other manatees. This underestimation is probably due to the electrodes being located several centimeters from the brain.

Subjects :: Acoustic Stimulation
Animals
Auditory Threshold physiology
Conditioning, Operant
Electrodes, Implanted
Evoked Potentials, Auditory physiology
Food
Male
Reward
Time Factors
Hearing physiology
Trichechus physiology

Language :: English
ISSN :: 0340-7594
Volume :: 191
Issue :: 10
Database :: MEDLINE
Journal :: Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology
Publication Type :: Academic Journal
Accession number :: 16001184
Full Text :: https://doi.org/10.1007/s00359-005-0016-2

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