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Connections
between Inferotemporal Cortex and Superior Temporal Sulcus
Laboratory for Neural
Architecture |
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Dr. K.S. Saleem,
and his colleagues in the Laboratory for Neural Architecture and Laboratory for
Cognitive Brain Mapping have shown the differential connections of anterior inferotemporal
cortex (areas TEad and TEav, respectively) with the superior temporal sulcus regions
(STS) in the macaque monkey (Saleem et al., 2000). Anterior inferotemporal cortex
of the macaque monkey is an extrastriate visual cortical area, which is thought
to be important for object vision, i.e., discrimination and recognition of visual
images of objects. A clear dichotomy in the connections of the rostral part of
STS has been demonstrated in the present study: the TEad is strongly connected
with the upper bank of rostral STS, whereas TEav is strongly connected with the
lower bank and fundus of the rostral STS (see Figure). These results revise the
classical view (in the literature) that the lower bank of rostral STS is connected
with inferotemporal cortex (area TEad) whereas the upper bank of rostral STS is
connected with the parietal, prefrontal and superior temporal regions. The upper
bank of the rostral STS is called the superior temporal polysensory area (STP;
see Figure), since it was previously found that neurons there respond to auditory,
somatosensory and/or visual stimuli. The present results thus suggest that the
polymodal representation in STP interacts more with information processing in
TEad than TEav. The results also suggested that the information processing in
the lower bank of the rostral STS is distinct from that in TEad, and the former
more directly interacts with TEav than TEad. |
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Saleem,
K. S., Suzuki, W., Tanaka, K., Hashikawa, T. Connections between anterior inferotemporal
cortex and superior temporal sulcus regions in the macaque monkey. J Neurosci
20, pp5083-5101 (2000)
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