Pattern vision in the grey squirrel after visual cortex ablation.
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E Wagor
Publications and source records attributed to E Wagor.
Cortical projections of posterior parietal cortex in owl monkeys.
Efferent cortical projections of posterior parietal cortex were determined by degeneration and autoradiographic methods in owl monkeys. Intraregional connections were to the immediate surround of the injection or lesion site, and to distinct foci within the posterior parietal region. The extraregional ipsilateral connections were with (1) previously established subdivisions of visual association cortex (the Dorsomedial Area, the Medial Area, the Dorsolateral Area, and the Middle Temporal Area), (2) other locations in caudal neocortex, and (3) frontal cortex. The callosal projections were to separate foci in posterior parietal cortex of the contralateral cerebral hemisphere. The separate foci of both ipsilateral and contralateral terminations in posterior parietal cortex raise the possibility that this region contains more than one functional subdivision. The connections with visual association cortex suggest a role for parietal cortex in visual behavior. Other foci in caudal neocortex indicate the possible locations of additional subdivisions of association cortex.
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Some cortical projections of the dorsomedial visual area (DM) of association cortex in the owl monkey, Aotus trivirgatus.
Efferent projections from the dorsomedial visual area (DM) in the owl monkey to other portions of visually responsive cortex were determined by degeneration and autoradiograhic methods of demonstrating axon pathways. The most prominent ipsilateral pathway was to posterior parietal cortex (PP) just medial to the terminal portion of the Sylvian fissure. Other ipsilateral projections were to subdivisions of the temporal lobe, the middle temporal visual area (MT) and the surrounding dorsolateral crescent (DL), to regions just rostral to area 18 on the medial wall of the cerebral hemisphere, and to the upper bank of the Sylvian fissure. The callosal projections of DM were to DM, PP, and MT of the opposite cerebral hemisphere. The results support the notion that visual association cortex consists of a number of separate, but complexly interrelated, subdivisions. The efferents to posterior parietal cortex suggest the possibility of an area for the integration of somatosensory and visual information.
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