Abstract：
:The aim of the present study was to examine whether the perception of slow body tilts in total darkness was affected by a complete loss of vestibular function. Four blindfolded bilateral labyrinthine-defective subjects (LDs) and 12 normal subjects (Normals) were seated and immobilized with large straps against the back of a rotating L-shaped platform, and were passively displaced from the upright at 0.05 degrees x s(-1) in the pitch and roll dimensions. Subjects were asked to detect the slow change in their body orientation, by indicating as soon as possible the direction of tilt. After a brief period of practice observed for all LDs at the beginning of the session, results showed no significant difference between LDs and Normals in the mean detection threshold recorded for each direction of tilt. The mean perceptual threshold was 4.4 versus 5.1 degrees in the roll dimension, and 6.1 versus 6.1 degrees in the pitch dimension, for the LDs and Normals, respectively. These findings indicate that the accurate perception of body orientation in quasi-static conditions is mainly allowed by somatosensory information rather than by otolithic inputs.
journal_name
Neuropsychologiajournal_title
Neuropsychologiaauthors
Bringoux L,Schmerber S,Nougier V,Dumas G,Barraud PA,Raphel Cdoi
10.1016/s0028-3932(01)00103-8subject
Has Abstractpub_date
2002-01-01 00:00:00pages
367-72issue
4eissn
0028-3932issn
1873-3514pii
S0028393201001038journal_volume
40pub_type
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