Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Gallasch, E; Kozlovskaya, I.
Functional testing of space flight induced changes in tonic motor control by using limb-attached excitation and load devices
ACTA ASTRONAUT. 2007; 60(4-7): 295-300.
Doi: 10.1016/j.actaastro.2006.08.017
Web of Science
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- Führende Autor*innen der Med Uni Graz
- Gallasch Eugen
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- Abstract:
- Long term space flights induce atrophy and contractile changes on postural muscles such effecting tonic motor control. Functional testing of tonic motor control structures is a challenge because of the difficulties to deliver appropriate test forces on crew members. In this paper we propose two approaches for functional testing by using limb attached loading devices. The first approach is based on a frequency and amplitude controllable moving magnet exciter to deliver sinusoidal test forces during limb postures. The responding limb deflection is recorded by an embedded accelerometer to obtain limb impedance. The second approach is based on elastic limb loading to evoke self-excited oscillations during arm extensions. Here the contraction force at the oscillation onset provides information about limb stiffness. The rationale for both testing approaches is based on Feldman's lambda-model. An arm expander based on the second approach was probed in a 6-month MIR space flight. The results obtained from the load oscillations, confirmed that this device is well suited to capture space flight induced neuromuscular changes. (c) 2006 Elsevier Ltd. All rights reserved.
- Find related publications in this database (Keywords)
- neuromuscular control
- limb dynamics
- moving mass exciter
- load oscillations
- lambda-model
- motor diagnosis
- microgravity