Phase-locked responses to pure tones in guinea pig auditory cortex.
Phase-locked responses to pure tones are a characteristic of most auditory cells at the level of the brain stem and allow sophisticated analyses based on coincidence detection. Phase-locking to tones has not previously been shown at the level of the auditory cortex in single unit studies. We have now identified phase-locked responses in 10% of low-frequency (< 1 kHz) units in the ventrorostral belt, a strip of cortex immediately ventral to the primary auditory area. All of these units showed phase-locking in their response to binaural tone pips of 60-200 Hz and showed narrow band pass characteristics within this range.
Wallace
M N
MN
MRC Institute of Hearing Research, University Park, Nottingham, UK.
Rutkowski
R G
RG
Shackleton
T M
TM
Palmer
A R
AR
D000161:Acoustic Stimulation; D000200:Action Potentials / Q000502:physiology*; D000818:Animals; D001303:Auditory Cortex / Q000166:cytology / Q000502:physiology*; D001307:Auditory Perception / Q000502:physiology*; D006168:Guinea Pigs; D009474:Neurons / Q000166:cytology / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology