Abstract:
:The intervibrissal fur-evoked activity in the rat somatosensory cortex was investigated using high-resolution optical imaging with a voltage-sensitive dye. The optical imaging revealed that the intervibrissal fur representation forms a U-shaped band around the borders of the posteromedial barrel subfield (PMBSF), and that this representation is characterized by a rostral-to-caudal somatotopic organization. When GABA(A)-mediated inhibition was partially suppressed by treatment with bicuculline, stimulation of the intervibrissal fur elicited spreading of an excitation wave in an area outside the PMBSF. The spreading wave propagated in both directions along the aforementioned U-shaped band of cortex, but barely invaded the center of the PMBSF. These imaging results suggest a distinct subdivision of cortex adjacent to, but outside, the PMBSF in the rat somatosensory cortex; this region receives input from intervibrissal fur, and seems to process its sensory information through well-developed local horizontal connections.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Takashima I,Kajiwara R,Iijima Tdoi
10.1016/j.neulet.2005.02.062keywords:
subject
Has Abstractpub_date
2005-06-24 00:00:00pages
258-63issue
3eissn
0304-3940issn
1872-7972pii
S0304-3940(05)00246-6journal_volume
381pub_type
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