| Popis: |
Pitch pursuit auditory tracking tests have been used to verify that there is an asymmetry between ears reflected by a change in tracking performance when stimulus and response signals are interchanged between ears. The asymmetry is shown to manifest itself differently when the tracking motor response is provided by (a) speech articulator muscles, and (b) non-articulator muscles. This dissociation between articulator and non-articulator muscles may indicate the existence of a specialized, speech-related centre for integration of auditory and sensorimotor activity. Analysis of tracking error signals suggests, however, that two separate physiological mechanisms may contribute to the asymmetry between ears: (i) the superior ability of the right hemisphere to analyse non-speech sounds, and (ii) the possible existence of a speech-related, auditory-sensorimotor integration centre. |
