Auditory filter width affects response magnitude but not frequency specificity in auditory cortex
This is fantastic news on a friday morning: Obleser lab Postdoc Björn Herrmann teamed up with his fellow Postdocs Mathias Scharinger and Molly Henry to study how spectral analysis in the auditory periphery (termed frequency selectivity) relates to processing in auditory cortex (termed frequency specificity; see also Björns paper in J Neurophysiol 2013).
Giving this an ageing and hearing loss perspective and building on the concept of auditory filters in the cochlea (Moore et al.), Björn found that the overall N1 amplitude of listeners, but not their frequency-specific neural adaptation patterns, is correlated with the pass-band of the auditory filter.
This suggests that widened auditory filters are compensated for by a response gain in frequency-specific areas of auditory cortex; the paper is in press and forthcoming in Hearing Research.
Paper is available online.
- Herrmann B, Henry MJ, Scharinger M, Obleser J. Auditory filter width affects response magnitude but not frequency specificity in auditory cortex. Hear Res. 2013 Oct;304:128–36. PMID: 23876524. [Open with Read]