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20 Cards in this Set

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