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20 Cards in this Set
- Front
- Back
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VIP neurons are selective for
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direction, speed, orientation
some are selective for distance especially near |
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Are VIP neurons bimodal or unimodal
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all are bimodal
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Somatosensory and visual RF of VIP neurons match in
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size, location, direction preference
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what do foveal visual RF's match
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mouth somatosensory RF's
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Ultranear neurons
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could signal stimuli that can be acquired by reaching with mouth
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Trajectory neurons
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selective for anticipated point of contact and operate in head centered coordinate
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VIP lesion
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impairs ability to reach with mouth
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VIP neurons can have RFs that include
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hand and face
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What is the possible role of VIP neurons
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may have a special role in hand, eye and mouth coordination, may encode targets in terms of how they can be acquired by reaching with mouth
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Describe MIP neurons
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bimodal, visual and somatosensory
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Multiple sensory and motor signals that can be carried by MIP neurons
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1. visual - sight of target and sight of hand
2. somatosensory - cutaneous and proprioceptive 3. hand movement - reachning and grasping 4. eye movement - saccade to target and tracking of hand |
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Visual responses are modulated by
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motor intention
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Modification of visual receptive fields
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is rapid, implies that connections are there all along
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AIP neurons are involved in
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sensory to motor transformations necessary for hand manipulation
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Primary evidence is
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AIP neurons selectivity for specific objects across different conditions - manipulation in light, dark, vision of object
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5 types of AIP neurons
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motor dominant, visual and motor (object or non-object), and visual dominant (object or non-object)
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Motor neurons encode
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hand action associated with object
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Non object type visual and V V+M neurons represent
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spatial characteristics of movement, including sight of hand movement
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Object type visual and V+M neurons represent
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spatial characteristics of object
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Object type V+M neurons
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help match hand movement to spatial characteristics of object to be manipulated
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