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Related Experiment Videos

Visuospatial and motor attention in the monkey.

M E Goldberg, M A Segraves

    Neuropsychologia
    |January 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    Visuospatial attention selects environmental stimuli for processing. Motor attention may similarly select motor signals, with the frontal cortex crucial for choosing which signals initiate movement.

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    Area of Science:

    • Neuroscience
    • Cognitive Neuroscience
    • Motor Control

    Background:

    • Visuospatial attention involves selecting external stimuli for neural processing.
    • The posterior parietal cortex shows attention-related enhancements in visual responses, suggesting a role in visuospatial attention.
    • Motor attention is hypothesized to involve selection among simultaneous upper motor signals, analogous to spatial attention.

    Purpose of the Study:

    • To explore the neural mechanisms underlying visuospatial and motor attention.
    • To investigate the role of the frontal cortex in selecting motor signals.
    • To examine how attention modulates motor output, using the oculomotor system as a model.

    Main Methods:

    • Analysis of neural processing in the posterior parietal cortex related to visuospatial attention.

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  • Postulation of motor attention as a selection process among upper motor signals.
  • Examination of the oculomotor system and frontal eye fields to understand motor signal selection.

    • Main Results:

    • Attention enhances visual responses in the posterior parietal cortex, supporting its role in visuospatial attention.
    • Attentive fixation can modulate the oculomotor system's response to frontal eye field stimulation.
    • The brain generates numerous simultaneous motor signals from sensory inputs.

    Conclusions:

    • The posterior parietal cortex is a likely neural substrate for visuospatial attention.
    • Motor attention likely involves selecting among competing upper motor signals.
    • The frontal cortex plays a key role in elaborating motor programs for purposive movements by selecting appropriate upper motor signals.