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  • 1
    Electronic Resource
    Electronic Resource
    Cortical networks for visual reaching (1993)
    Springer
    Experimental brain research 97 (1993), S. 361-365 
    Details
    ISSN: 1432-1106
    Keywords: Visuomotor integration ; Parietal and frontal lobes ; Corticocortical connectivity ; Arm movements ; Monkey
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The cortical anatomical substrates by which visual information may influence the frontal areas controlling reaching movements to visual targets were studied in monkeys. A reaching task was employed to characterize the arm-related regions of the frontal lobe. Injections of retrograde tracers into these physiologically defined cortical fields revealed a gradient of parallel corticocortical pathways originating in the superior parietal lobule and impinging upon different frontal regions. These results support the hypothesis that the superior parietal lobule can supply the frontal motor and premotor areas not only with the proprioceptive information but also with the visual input required for the control of reaching.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00228707
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Shift of preferred directions of premotor cortical cells with arm movements performed across the workspace (1990)
    Springer
    Experimental brain research 83 (1990), S. 228-232 
    Details
    ISSN: 1432-1106
    Keywords: Premotor cortex ; Arm movement ; Movement direction ; Coordinate system ; Monkey
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The activity of 156 neurons was recorded in the premotor cortex (Weinrich and Wise 1982) and in an adjoining rostral region of area 6 (area 6 DR; Barbas and Pandya 1987) while monkeys made visually-guided arm movements of similar direction within different parts of space. The activity of individual neurons varied most for a given preferred direction of movement within each part of space. These neurons (152/156, 97.4%) were labeled as directional. The spatial orientation of their preferred directions shifted in space to “follow” the rotation of the shoulder joint necessary to bring the arm into the different parts of the work-space. These results suggest that the cortical areas studied represent arm movement direction within a coordinate system rotating with the arm and where signals about the movement direction relate to the motor plan through a simple invariant relationship, that between cell preferred direction and arm orientation in space.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00232214
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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