Neuroscience 2001 Abstract
| Presentation Number: | 511.20 |
|---|---|
| Abstract Title: | CALCARINE AREA V1 AS A MULTIMODAL CONVERGENCE AREA. |
| Authors: |
Rockland, K. S.*1
; Ojima, H.1
1Lab Cortical Org & Systematics, Brain Sci Inst, RIKEN, Saitama, Japan |
| Primary Theme and Topics |
Sensory Systems - Vision -- Striate visual cortex: Attention and cognition |
| Session: |
511. Multisensory I Poster |
| Presentation Time: | Tuesday, November 13, 2001 11:00 AM-12:00 PM |
| Location: | Exhibit Hall Y-3 |
| Keywords: | auditory parabelt, peripheral vision, prostriata, layer 1 |
Area V1 in the calcarine fissure has been rather under-investigated, but, given its peripheral field representation, it is likely to be specialized for other functions is than foveal V1. Recent investigations (Rockland, SFN 2000) in fact demonstrated direct connections from several parietal regions to calcarine V1. In this report, we identify additional connections from several auditory parabelt regions. In one monkey (M. fuscata), an injection of Fluororuby in area Tpo (dorsal lip of the STS) resulted in moderate but widespread projections to layer 1 of V1 in its anterior 3.0mm. There were also some terminations, and retrogradely labeled neurons, in a small region of dorsally adjoining V2. In the same animal, an injection of BDA in area Tpt resulted in connections to area V2 and, very sparsely, to V1. The connections to V2 were denser than those from Tpo and occurred mainly in layers 1-3, with involvement of other layers. Retrogradely labeled neurons occurred in V2 in layers 3 and 5. The injection in Tpo, but not in Tpt resulted in mainly retrograde label anterior to V1, in area Prostriata. Sparse retrograde label also occurred, after a gap, in the caudomedial lobule. These data provide further evidence for nonretinal inputs to calcarine V1, perhaps related to visuospatial or attentional processes.
Supported by RIKEN BSI
Sample Citation:
[Authors]. [Abstract Title]. Program No. XXX.XX. 2001 Neuroscience Meeting Planner. San Diego, CA: Society for Neuroscience, 2001. Online.
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