Etude de la sensibilité auditive d’un Lemurien malgache : Microcebus murinus (J.-F. Miller, 1777)

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Abstract
A study of the auditory sensitivity of the nocturnal and semi-hibernating prosimian M. murinus was carried out using the auditory evoked potential threshold technique at cortical level. This was performed on 11 anesthetized animals of 2 different subspecies M. m. murinus and M. m. rufus ranging in age from 1-7 yr. The auditory curves of the young animals were most often bimodal: the 1st peak appears between 1-2 kHz, the 2nd between 12-14 kHz. Older and prehiberating animals have a flat audiogram because of the disappearance of the 2 kHz peak; in comparison to young animals, their thresholds are 15-27 dB higher.

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