Abstract:
:Neurons of the lateral olivocochlear (LOC) system project from the auditory brainstem to the cochlea, where they synapse on radial dendrites of auditory nerve fibers. Selective LOC disruption depresses sound-evoked auditory nerve activity in the guinea pig, but enhances it in the mouse. Here, LOC disruption depressed spontaneous auditory nerve activity in the guinea pig. Recordings from single auditory nerve fibers revealed a significantly reduced proportion of fibers with the highest spontaneous firing rates (SRs) and an increased proportion of neurons with lower SRs. Ensemble activity, estimated using round window noise, also decreased after LOC disruption. Decreased spontaneous activity after LOC disruption may be a consequence of reduced tonic release of excitatory transmitters from the LOC terminals in guinea pigs.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Le Prell CG,Dolan DF,Hughes LF,Altschuler RA,Shore SE,Bledsoe SC Jrdoi
10.1016/j.neulet.2014.08.040subject
Has Abstractpub_date
2014-10-17 00:00:00pages
54-8eissn
0304-3940issn
1872-7972pii
S0304-3940(14)00702-2journal_volume
582pub_type
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