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Dextrous Manipulation in Microgravity (GRIP)
Principal Investigator
Research Area:
Muscle physiology
Species Studied
Scientific Name: Homo sapiens Species: Human

A stable grip on hand-held objects is of primary importance to lifting and moving actions, particularly when the objects are used as tools. The “precision grip” - holding an object between the thumb and fingertips - is used to study how the brain adapts when handling different kinds of objects during a series of tasks before, during and after space flight. The objectives of this experiment are:

(1)   To study the long-term adaptation of grip-force/load-force coordination to the microgravity environment.
       a.   Effects of weight versus mass
       b.   Optimization of movement kinematics and dynamics
       c.   Grip force during controlled collisions

(2)  To study the interaction between cognitive and proprioceptive cues with respect to control of grip force and movement kinematics for “upward” versus “downward” movements.

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Data Information
Data Availability
Archiving in progress. Data is not yet available for this experiment.

Finger moisture
Grip force
Load force
Manipulandum orientation
Manipulandum position
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Mission/Study Information
Mission Launch/Start Date Landing/End Date Duration
Expedition 42 11/10/2014 03/11/2015 121 days
Expedition 43 03/11/2015 06/10/2015 91 days
Expedition 50 10/28/2016 04/09/2017 164 days
Expedition 51 04/09/2017 06/02/2017 55 days
Expedition 56 06/03/2018 10/04/2018 123 days
Expedition 57 10/04/2018 12/20/2018 77 days
Expedition 60 06/24/2019 10/03/2019 101 days
Expedition 61 10/03/2019 02/06/2020 126 days
Expedition 63 04/17/2020 10/21/2020 187 days
Expedition 64 10/21/2020 In progress

Additional Information
Managing NASA Center
Johnson Space Center (JSC)
Responsible NASA Representative
Johnson Space Center LSDA Office
Project Manager: Pamela A. Bieri
Institutional Support
European Space Agency (ESA)
Proposal Date
Proposal Source