Human auditory cortical responses to pitch and to pitch strength

Neuroreport. 2011 Feb 16;22(3):111-5. doi: 10.1097/WNR.0b013e328342ba30.

Abstract

Pitch is a fundamental auditory sensation, underlying both music and speech perception. This study was designed to explore pitch coding in human auditory cortex by testing whether activity in pitch-responsive regions covaries as a function of pitch salience (pitch strength). A psychophysical paradigm was used to confirm three levels of pitch salience for two different pitch-evoking stimuli. The location and magnitude of the response to these stimuli were measured using functional magnetic resonance imaging. A pitch response was found in planum temporale, close to the posterolateral border of Heschl's gyrus. However, the response was not sensitive to pitch salience. One interpretation is that pitch-sensitive regions are maximally responsive to the presence or absence of pitch and not to pitch salience.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acoustic Stimulation / methods
  • Adult
  • Auditory Cortex / physiology*
  • Brain Mapping / methods
  • Evoked Potentials, Auditory / physiology
  • Female
  • Humans
  • Loudness Perception / physiology*
  • Magnetic Resonance Imaging / methods
  • Male
  • Middle Aged
  • Pitch Perception / physiology*
  • Young Adult