Influence of Gravity on Dexterity, Hand-eye Coordination and Perception of Orientation and Distances

Not Applicable

• Conditions: Healthy Volunteers
• Interventions: Other: Parabolic flight; Other: movements of the upper limb, the gripping force, muscle activity and eye-cephalic subject movement measurements

• Registration Number: NCT02563249
• Lead Sponsor: University Hospital, Caen

Brief Summary

If investigators know that the anticipatory mechanisms involved in precision grip take into account the gravity, however it is unclear how they adapt to changes in the gravitational level. The objectives of this study are to study and model the movement control and the mechanisms underlying learning and adapting to the condition of weightlessness. Specifically, i) investigators will determine if a change in the level of gravity is taken into account when controlling grip force and ii) investigators will examine the effects of gravity change on hand-eye coordination.

Detailed Description

Not available

Study Timeline

• Study Start: 2012-05
• Study First Submitted: 2015-07-23
• Status Verified: 2015-09
• Study First Submitted QC: 2015-09-28
• Last Update Submitted: 2015-09-28
• Study First Posted: 2015-09-30
• Last Update Posted: 2015-09-30
• Primary Completion: 2015-12

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 90

Inclusion Criteria

• Healthy volunteers, male or female
• 18 to 65 years
• Affiliated with a Social Security plan or holder of a European Health Insurance Card (EHIC - European Health Insurance Card - EHIC).
• Having an aeronautical medical certificate of fitness for flight personnel unprofessional functions in civil aviation.
• Agreeing to participate in the study
• Having given informed consent

Exclusion Criteria

• person not affiliated to a Social Security Inssurance,
• person who participated in a clinical trial within the trial below the exclusion period,
• person with a medical history or any acute or chronic condition that can affect the test results, or by running a risk on during the protocol, especially topics: past or present history of neurological disease, rheumatologic or otologic (hearing or equilibration) OR person with a corrected visual acuity of less than 5 / 10th.
• pregnant women.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Dexterity, Coordination,Perception measurements	Parabolic flight	Dexterity, Hand-eye Coordination and Perception of Orientation and Distances
Dexterity, Coordination,Perception measurements	movements of the upper limb, the gripping force, muscle activity and eye-cephalic subject movement measurements	Dexterity, Hand-eye Coordination and Perception of Orientation and Distances

Primary Outcome Measures

Name	Time	Method
Gravity induced changes in grip strength (newton) exerted between the fingers measured with strain gauges	baseline
Gravity induced changes in oculo-manual coordination measured by the latency (ms) of anticipatory eye movement measurement with videooculography	baseline

Trial Locations

Locations (1)

Umr Ucbn/Inserm U1075 Comete; 🇫🇷 Caen CEDEX, Basse-Normandie, France