PMID- 16154452
OWN - NLM
STAT- MEDLINE
DCOM- 20060104
LR  - 20091111
IS  - 0028-3932 (Print)
IS  - 0028-3932 (Linking)
VI  - 43
IP  - 12
DP  - 2005
TI  - Hemispheric asymmetry in a dissociation between the visuomotor and 
      visuoperceptual streams.
PG  - 1763-73
AB  - We have explored the level of interaction between the putative visuoperceptual 
      (VP) and visuomotor (VM) processing streams within each cerebral hemisphere. Six 
      patients with unilateral brain lesions and 26 intact-brain participants were 
      tested. We presented three-dimensional versions of the Mueller-Lyer illusion 
      separately to the left and to the right hemifields of each participant. In one 
      condition, the participant grasped the central shaft of the illusion object 
      between the thumb and forefinger (visuomotor task). In the other, the participant 
      estimated the size of the shaft using the same fingers (visuoperceptual task). We 
      calculated the magnitude of the illusion in each task for each hemifield. 
      Intact-brain participants had a significantly larger illusion in estimation than 
      in grasping in both hemifields. The two patients with right-hemisphere damage 
      showed a large dissociation between grasping and estimation illusions, whereas 
      the four patients with left-hemisphere damage showed no detectable dissociation. 
      These results are consistent with the idea that the visuomotor and 
      visuoperceptual streams are more dissociated in the left hemisphere than in the 
      right.
FAU - Radoeva, Petya D
AU  - Radoeva PD
AD  - Program in Neuroscience and Behavior, Mount Holyoke College, 50 College Street, 
      South Hadley, MA 01075, USA. petya@mail.upenn.edu
FAU - Cohen, Joseph D
AU  - Cohen JD
FAU - Corballis, Paul M
AU  - Corballis PM
FAU - Lukovits, Timothy G
AU  - Lukovits TG
FAU - Koleva, Svetlinka G
AU  - Koleva SG
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Neuropsychologia
JT  - Neuropsychologia
JID - 0020713
SB  - IM
MH  - Aged
MH  - Brain Injuries/etiology/pathology/*physiopathology
MH  - Female
MH  - Functional Laterality/*physiology
MH  - Humans
MH  - Magnetic Resonance Imaging/methods
MH  - Male
MH  - Middle Aged
MH  - Optical Illusions
MH  - Perceptual Disorders/pathology/*physiopathology
MH  - Photic Stimulation/methods
MH  - Psychomotor Performance/*physiology
MH  - Psychophysics/methods
MH  - Reaction Time/physiology
MH  - Space Perception/*physiology
MH  - Time Factors
MH  - Vascular Diseases/complications
MH  - Visual Perception/*physiology
EDAT- 2005/09/13 09:00
MHDA- 2006/01/05 09:00
CRDT- 2005/09/13 09:00
PHST- 2004/06/24 00:00 [received]
PHST- 2005/02/04 00:00 [revised]
PHST- 2005/02/10 00:00 [accepted]
PHST- 2005/09/13 09:00 [pubmed]
PHST- 2006/01/05 09:00 [medline]
PHST- 2005/09/13 09:00 [entrez]
AID - S0028-3932(05)00104-1 [pii]
AID - 10.1016/j.neuropsychologia.2005.02.005 [doi]
PST - ppublish
SO  - Neuropsychologia. 2005;43(12):1763-73. doi: 
      10.1016/j.neuropsychologia.2005.02.005.