The distribution of cerebral activity related to visuomotor coordination indicating perceptual and executional specialization.

Details

Serval ID
serval:BIB_86245C564D66
Type
Article: article from journal or magazin.
Collection
Publications
Title
The distribution of cerebral activity related to visuomotor coordination indicating perceptual and executional specialization.
Journal
Cognitive Brain Research
Author(s)
de Jong B.M., Frackowiak R.S., Willemsen A.T., Paans A.M.
ISSN
0926-6410 (Print)
ISSN-L
0926-6410
Publication state
Published
Issued date
1999
Volume
8
Number
1
Pages
45-59
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov'tPublication Status: ppublish
Abstract
The distribution of increased regional cerebral blood flow (rCBF) related to visuomotor coordination was studied by means of positron emission tomography (PET) in normal subjects. An experimental condition, in which a vertically presented zigzag figure had to be copied in a horizontal orientation, was compared with a control condition in which the same horizontal drawing was made, guided by a horizontally presented example. Cognitive components dealing with the mismatch in visual orientation resulted in activation of (i) right dorsal premotor cortex, (ii) right posterior parietal cortex, (iii) visual cortex (area V1) and (iv) left fusiform gyrus. In a second experiment, conditions were compared in which the same horizontal zigzag figure was copied in either a vertical or a horizontal orientation. Now, the motor components of the transformation of orientation appeared to be associated only with left premotor cortex activation. The differential distribution of activations is regarded to reflect the selective effort to cope with either the visual or the motor component of spatial incongruity, and indicates specialization for perceptual and executive components in visuomotor control. We propose that the perceptual component of visuomotor transformation in our experiment relates to a realignment of the coordinates of a percept to an internally defined coordinate system. The executive component relates to guidance of movement within an internal representation of space. In a preceding behavioural experiment, a majority of patients with Parkinson's disease (PD) failed on the task in which they had to make a horizontal copy of a vertically presented picture. This finding may suggest a deficit in the maintenance of an internal spatial representation to guide movement.
Keywords
Adolescent, Adult, Cerebrovascular Circulation/physiology, Female, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Motor Cortex/blood supply, Motor Cortex/physiology, Parietal Lobe/blood supply, Parietal Lobe/physiology, Psychomotor Performance/physiology, Tomography, Emission-Computed, Visual Cortex/blood supply, Visual Cortex/physiology, Visual Perception/physiology
Pubmed
Web of science
Create date
12/09/2011 20:47
Last modification date
20/08/2019 14:45
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