title: [Effect of a real and simulated weightlessness on characteristics of the static torsional otolith-cervical-ocular reflex].
abstract: To determine the role of the support-proprioceptive factor in the functioning of the vestibular system, in particular the static torsional otolith-cervical-ocular reflex (OCOR), comparative OCOR studies with videooculography recording were performed after a 7-day "dry" horizontal immersion (16 immersion subjects) and after a prolonged (126 to 195 days) exposure to weightlessness (14 ISS cosmonauts). For the first time it was demonstrated that minimization of the support and propripceptive afferentation may results in an inversion or absence of the static torsional OCOR and the development of a positional nystagmus with an inverted reflex. A comparative OCOR data analysis of cosmonauts and immersion subjects has revealed similarity of responses. However, changes in OCOR after immersion were noted in only 60% of subjects, while after space fight, 90% of cosmonauts showed them. Post-flight changes were more frequent, marked and long-lasting.
authors.forename: L N
authors.initials: LN
authors.lastname: Kornilova
authors.forename: I A
authors.initials: IA
authors.lastname: Naumov
authors.forename: S M
authors.initials: SM
authors.lastname: Makarova
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D012018:Reflex; D013026:Space Flight; D013997:Time Factors; D014722:Vestibule, Labyrinth; D014893:Weightlessness