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1 Psychological and Brain Sciences, Dartmouth College, 03755, New Hampshire, United States
2 Hanover, New Hampshire, United States; Psychological and Brain Sciences, Dartmouth College, 03755, New Hampshire, United States
3 Dartmouth College, Lebanon, New Hampshire, United States; Psychological and Brain Sciences, Dartmouth College, 03755, New Hampshire, United States
* To whom correspondence should be addressed. E-mail: yec{at}dartmouth.edu.
The neural computations that underlie the processing of auditory-stimulus identity are not well understood, especially how information is transformed across different cortical areas. Here, we compared the capacity of neurons in the superior temporal gyrus (STG) and the ventrolateral prefrontal cortex (vPFC) to code the identity of an auditory stimulus; these two areas are part of a ventral processing stream for auditory-stimulus identity. Whereas the responses of neurons in both areas are reliably modulated by different vocalizations, STG responses code significantly more vocalizations than those in the vPFC. Together, these data indicate that the STG and vPFC code auditory identity but between these two areas there is substantial information processing, a result consistent with the hypothesis that these areas are part of a functional circuit for auditory-identity analysis.
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