PMID- 2790066
OWN - NLM
STAT- MEDLINE
DCOM- 19891107
LR  - 20190912
IS  - 0340-1200 (Print)
IS  - 0340-1200 (Linking)
VI  - 61
IP  - 5
DP  - 1989
TI  - Selective impairment of visual motion interpretation following lesions of the 
      right occipito-parietal area in humans.
PG  - 347-59
AB  - A group of eighteen patients selected on the basis of the anatomical locus of the 
      lesion, normal visual acuity and the ability to discriminate visual motion, were 
      assessed on the perception of Julesz Random-Dot stereograms and on three tasks of 
      visual motion interpretation: Speed Discrimination, 3D-Structure-from-Motion and 
      2D-Form-from-motion. The results on these experimental tasks demonstrate a double 
      dissociation of deficits on the visual analysis of motion and stereopsis in the 
      patients with lesions to the posterior right hemisphere. The right 
      occipital-parietal (ROP) group failed on the Stereopsis task and showed a 
      dramatic impairment on the Speed Comparison and on the Structure-from-Motion 
      experiments. They performed in the normal range, however, on the 
      2D-Form-from-Motion task. The right occipital-temporal (ROT) group, on the other 
      hand, were severely impaired on the identification of two dimensional forms from 
      motion or stereopsis. In both cases, however, they were able to obtain a coarse 
      segregation of the figure from the background. The ROT group did not present 
      significant deficits on the Speed Discrimination and the Structure-from-Motion 
      tasks. The results are discussed in the light of recent physiological and 
      psychophysical findings, and it is hypothesized that, in the human brain, visual 
      deficits of motion interpretation and of stereopsis are associated with right 
      occipital-parietal lesions.
FAU - Vaina, L M
AU  - Vaina LM
AD  - Biomedical Engineering Department, Boston University, MA.
LA  - eng
GR  - R01 EY007861/EY/NEI NIH HHS/United States
GR  - US-PHS 06209/PH/PHPPO CDC HHS/United States
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, P.H.S.
PL  - Germany
TA  - Biol Cybern
JT  - Biological cybernetics
JID - 7502533
SB  - IM
MH  - Adult
MH  - Aged
MH  - Female
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - Motion Perception/*physiology
MH  - Occipital Lobe/*physiology
MH  - Parietal Lobe/*physiology
MH  - Photic Stimulation
MH  - Visual Pathways/*physiology
EDAT- 1989/01/01 00:00
MHDA- 1989/01/01 00:01
CRDT- 1989/01/01 00:00
PHST- 1989/01/01 00:00 [pubmed]
PHST- 1989/01/01 00:01 [medline]
PHST- 1989/01/01 00:00 [entrez]
AID - 10.1007/BF00200800 [doi]
PST - ppublish
SO  - Biol Cybern. 1989;61(5):347-59. doi: 10.1007/BF00200800.