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Functional Magnetic Resonance Imaging Reveals the Neural Substrates of Arm Transport and Grip Formation in Reach-to-Grasp Actions in Humans
Picking up a cup requires transporting the arm to the cup (transport component) and preshaping the hand appropriately to grasp the handle (grip component). Here, we used functional magnetic resonance…
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The role of parietal cortex in visuomotor control: What have we learned from neuroimaging?
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Closely overlapping responses to tools and hands in left lateral occipitotemporal cortex.
TLDR
It is proposed that the functional organization of high-order visual cortex partly reflects the organization of downstream functional networks, such as the fronto-parietal action network, due to differences within visual cortex in the connectivity to these networks.
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Dissociable neural responses to hands and non-hand body parts in human left extrastriate visual cortex.
TLDR
Evidence is provided for a representation of the hand in extrastriate visual cortex that is distinct from the representation of other body parts.
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Is That within Reach? fMRI Reveals That the Human Superior Parieto-Occipital Cortex Encodes Objects Reachable by the Hand
TLDR
Slow event-related functional magnetic resonance imaging (fMRI) findings suggest that neural responses within brain areas coding actions (such as SPOC for reaching) may reflect automatic processing of motor affordances ( such as reachability with the hand).
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Dissociating Arbitrary Stimulus-Response Mapping from Movement Planning during Preparatory Period: Evidence from Event-Related Functional Magnetic Resonance Imaging
TLDR
A clear dissociation is suggested in the preparatory-set period between the more abstract role of left SPL in activating the appropriate S-R associations and the more concrete role played by the SMA, dPM, and ACC in preparing the required motor programs.
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Redundant target effect and intersensory facilitation from visual-tactile interactions in simple reaction time
TLDR
RT to single or dual tactile stimuli was fastest when observers could see the sites of tactile stimulation on their hands both directly and through a mirror at the same time, which can be ascribed to the convergence of tactile and visual inputs onto neural centers which contain flexible multimodal representations of body parts.
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Separate channels for processing form, texture, and color: evidence from FMRI adaptation and visual object agnosia.
TLDR
It is found that areas selective for shape, texture, and color individually were quite distinct from those that respond to all of these features together (shape and texture and color), and appear to correspond to those associated with the perception of complex stimuli such as faces and places.
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FMRI Reveals a Dissociation between Grasping and Perceiving the Size of Real 3D Objects
TLDR
The demonstration of dual coding of an object for the purposes of action on the one hand and perception on the other in the same healthy brains offers a substantial contribution to the current debate about the nature of the neural coding that takes place in the dorsal and ventral streams.
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Does tool-related fMRI activity within the intraparietal sulcus reflect the plan to grasp?
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