- CConnexion
RééDOC
75 Boulevard Lobau 54042 NANCY cedex Christelle Grandidier Documentaliste 03 83 52 67 64 0
|
Differential effects of ambivalent visual-vestibular somatosensory stimulation on the perception of self-motion
PROBST T; STRAUBE A; BLES W
BEHAV BRAIN RES , 1985, vol. 16, n° 1, p. 71-79 Doc n°: 100085 Localisation : Documentation IRR Descripteurs : AD3 - MOTRICITE The direction of perceived self-motion was determined as a function of combined visual-vestibular and vestibulo-somatosensory stimulations about the earth's vertical z-axis by means of a rotary chair and drum system. The predominant influence of concurrent antagonistic vestibular stimulation on circular vection (CV) even at small accelerations has been demonstrated by several studies in the past. The results of the present paper do not confirm the generally assumed influence of the vestibular system on exocentric motion perception, but instead produce evidence of the dominance of the visual channel even at high acceleration levels. Using a joystick to indicate perceived self-motion, we found the following: Constant CV (visual stimulus velocity: 40 degrees/s) could only be cancelled by vestibular stimulations at oppositely directed mean angular accelerations of 26.9 +/- 9.1 degrees/s2. Smaller accelerations led merely to an acceleration level-related decrease in the perceived velocity of CV. Despite a clear decision with respect to the direction of the perceived motion, subjects (Ss) reported dizziness or even strong motion sickness symptoms. Similar results were obtained with vestibulo-somatosensory interactions. Langue : ANGLAIS Tiré à part : OUI Identifiant basis : 2001216025 |
0
|