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Titolo:
Neuronal basis of the motion aftereffect reconsidered
Autore:
Huk, AC; Ress, D; Heeger, DJ;
Indirizzi:
Stanford Univ, Dept Psychol, Stanford, CA 94305 USA Stanford Univ Stanford CA USA 94305 Dept Psychol, Stanford, CA 94305 USA
Titolo Testata:
NEURON
fascicolo: 1, volume: 32, anno: 2001,
pagine: 161 - 172
SICI:
0896-6273(20011011)32:1<161:NBOTMA>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN VISUAL-CORTEX; CAT STRIATE CORTEX; DIRECTION-SELECTIVE ADAPTATION; POSITRON EMISSION TOMOGRAPHY; AREA MT; ATTENTIONAL MODULATION; FUNCTIONAL MRI; CORTICAL AREAS; SPEED SENSITIVITY; ORTHOGONAL MOTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
88
Recensione:
Indirizzi per estratti:
Indirizzo: Huk, AC Univ Washington, Dept Physiol & Biophys, Box 357290, Seattle, WA 98195 USA Univ Washington Box 357290 Seattle WA USA 98195 ttle, WA 98195 USA
Citazione:
A.C. Huk et al., "Neuronal basis of the motion aftereffect reconsidered", NEURON, 32(1), 2001, pp. 161-172

Abstract

Several fMRI studies have reported MT+ response increases correlated with perception of the motion aftereffect (MAE). However, attention can stronglyaffect MT+ responses, and subjects may naturally attend more to the MAE than control trials without MAE. We found that requiring subjects to attend to motion on both MAE and control trials produced equal levels of MT+ response, suggesting that attention may have confounded the interpretation of previous experiments; in our data, attention accounts for the entire effect. After eliminating this confound, we observed that direction-selective motionadaptation produced a direction-selective imbalance in MT+ responses (and earlier visual areas), and yielded a corresponding asymmetry in speed discrimination thresholds. These findings provide physiological evidence that population level response imbalances underlie the MAE, and quantify the relative proportions of direction-selective neurons across human visual areas.

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Documento generato il 19/01/20 alle ore 09:02:29