Format

Send to

Choose Destination
Curr Biol. 2013 Apr 8;23(7):620-5. doi: 10.1016/j.cub.2013.03.003. Epub 2013 Mar 21.

Auditory cortex represents both pitch judgments and the corresponding acoustic cues.

Author information

1
Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3PT, UK. j.bizley@ucl.ac.uk

Abstract

The neural processing of sensory stimuli involves a transformation of physical stimulus parameters into perceptual features, and elucidating where and how this transformation occurs is one of the ultimate aims of sensory neurophysiology. Recent studies have shown that the firing of neurons in early sensory cortex can be modulated by multisensory interactions [1-5], motor behavior [1, 3, 6, 7], and reward feedback [1, 8, 9], but it remains unclear whether neural activity is more closely tied to perception, as indicated by behavioral choice, or to the physical properties of the stimulus. We investigated which of these properties are predominantly represented in auditory cortex by recording local field potentials (LFPs) and multiunit spiking activity in ferrets while they discriminated the pitch of artificial vowels. We found that auditory cortical activity is informative both about the fundamental frequency (F0) of a target sound and also about the pitch that the animals appear to perceive given their behavioral responses. Surprisingly, although the stimulus F0 was well represented at the onset of the target sound, neural activity throughout auditory cortex frequently predicted the reported pitch better than the target F0.

PMID:
23523247
PMCID:
PMC3696731
DOI:
10.1016/j.cub.2013.03.003
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Elsevier Science Icon for PubMed Central
Loading ...
Support Center