Saccades and reaches to auditory targets are coded in eye-centered reference frames in the lateral intraparietal cortex (LIP) and in parietal reach region (PRR). However, the location of a sound is computed based on head-centered information in the early stages of the auditory pathway. A coordinate transformation from a head-centered reference frame to an eye-centered one likely occurs as auditory signals ascend from early auditory areas to parietal areas.
We recorded auditory responses from temporo-parietal auditory association cortex (Tpt) in an awake monkey. Our results suggest that Tpt may be intermediate between cells in the primary auditory cortex and posterior parietal cortex (PPC) in the process of coordinate transformation.