Abstract：
:Neural responses in early sensory areas are influenced by top-down processing. In the visual system, early visual areas have been shown to actively participate in top-down processing based on their topographical properties. Although it has been suggested that the auditory cortex is involved in top-down control, functional evidence of topographic modulation is still lacking. Here, we show that mental auditory imagery for familiar melodies induces significant activation in the frequency-responsive areas of the primary auditory cortex (PAC). This activation is related to the characteristics of the imagery: when subjects were asked to imagine high-frequency melodies, we observed increased activation in the high- versus low-frequency response area; when the subjects were asked to imagine low-frequency melodies, the opposite was observed. Furthermore, we found that A1 is more closely related to the observed frequency-related modulation than R in tonotopic subfields of the PAC. Our findings suggest that top-down processing in the auditory cortex relies on a mechanism similar to that used in the perception of external auditory stimuli, which is comparable to early visual systems.
journal_name
J Cogn Neuroscijournal_title
Journal of cognitive neuroscienceauthors
Oh J,Kwon JH,Yang PS,Jeong Jdoi
10.1162/jocn_a_00280subject
Has Abstractpub_date
2013-02-01 00:00:00pages
175-87issue
2eissn
0898-929Xissn
1530-8898journal_volume
25pub_type
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