Abstract:
:Contemporary proposals for the pathophysiology of tinnitus due to cochlear damage underscore increased spontaneous activity of auditory brainstem neurons. One of the several consequences of the cochlear injury is the activation of the ERK pathway, suppression of phosphodiestase E activity, and putatively setting a long-term increase in intracellular levels of cyclic AMP at central auditory neurons. Local application of forskolin also increases intracellular cyclic AMP and spontaneous neural activity. We measured the effects of locally applied forskolin on spontaneous firing rate of isolated neurons in the peri-olivary region of the superior olive complex in anesthetized adult Long Evan rats. Forskolin induced increase in spontaneous neural activity was comparable to supra-threshold tone evoke neural responses. These results are viewed in context of hyperexcitability as a correlate of tinnitus.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Shaikh AG,Finlayson PGdoi
10.1016/j.neulet.2012.10.053subject
Has Abstractpub_date
2012-12-07 00:00:00pages
69-73issue
2eissn
0304-3940issn
1872-7972pii
S0304-3940(12)01434-6journal_volume
531pub_type
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