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Titolo:
Optic flow is used to control human walking
Autore:
Warren, WH; Kay, BA; Zosh, WD; Duchon, AP; Sahuc, S;
Indirizzi:
Brown Univ, Dept Cognit & Linguist Sci, Providence, RI 02912 USA Brown Univ Providence RI USA 02912 Linguist Sci, Providence, RI 02912 USA
Titolo Testata:
NATURE NEUROSCIENCE
fascicolo: 2, volume: 4, anno: 2001,
pagine: 213 - 216
SICI:
1097-6256(200102)4:2<213:OFIUTC>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
INDUCED MOTION; EYE-MOVEMENTS; MST NEURONS; PERCEPTION; MONKEY; LOCOMOTION; DIRECTION; AREA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Warren, WH Brown Univ, Dept Cognit & Linguist Sci, Providence, RI 02912 USA Brown Univ Providence RI USA 02912 i, Providence, RI 02912 USA
Citazione:
W.H. Warren et al., "Optic flow is used to control human walking", NAT NEUROSC, 4(2), 2001, pp. 213-216

Abstract

How is human locomotion visually controlled? Fifty years ago, it was proposed that we steer to a goal using optic flow, the pattern of motion at the eye that specifies the direction of locomotion. However, we might also simply walk in the perceived direction of a goal. These two hypotheses normallypredict the same behavior, but we tested them in an immersive virtual environment by displacing the optic flow from the direction of walking, violating the laws of optics. We found that people walked in the visual direction of a lone target, but increasingly relied on optic flow as it was added to the display. The visual control law for steering toward a goal is a linear combination of these two variables weighted by the magnitude of flow, thereby allowing humans to have robust locomotor control under varying environmental conditions.

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Documento generato il 31/03/20 alle ore 15:51:11