The Cosmos 2229 neurovestibular hardware measures vestibular nuclei response (VNR) and direction and velocity of primate head movement, driven by rotational and oscillating devices and the associated neurovestibular response due to microgravity exposure.
Subsystems
Angular Rate Sensors: These sensors, one each for pitch and yaw, measure head motion velocity (HMV) and are mounted on the outside of the Cranial Cap.
HMV Signal Conditioner: The conditioner receives input from the HMV sensors and provides output voltage levels proportional to the pitch and yaw angular rates. The pitch and yaw outputs are then routed to the Russian Final Amplifier Box.
Amplifiers and Preamplifiers: Supplied in the form of hybrid integrated circuits, the amplifiers and preamplifiers include a multiplexing VNR amplifier, which preconditions a total of seven signals; two logic signals, which control a multiplexer in selecting among four serially switched inputs (for recording on a Russian recorder channel); and an EEG/EOG hybrid, which conditions electroencephalogram (EEG) and electrooculogram (EOG) signals.
Specifications
Dimensions: N/A
Weight: N/A
Power: 27 VDC
Data Acquisition
Head motion velocity (pitch and yaw), vestibular nuclei response
Related Ground-Based Hardware
Four-axis Vestibular and Optokinetic Rotators: The rotators are used pre- and postflight to present neurovestibular stimuli.
Multi-axis Rotator: The rotator is used for pre- and postflight studies of primate eye position, VNR, and vestibular primary afferent response.
Portable Linear Sled (PLS): The PLS is used pre- and postflight for measurements during horizontal oscillations of specified frequency and sinusoidal acceleration.
Ground Test Unit-1 (GTU-1): The GTU-1 is used pre- and postflight for equipment testing and data recording.
• Connolly, J.P., M.G. Skidmore, and D.A. Helwig: Final Reports of the U.S. Experiments Flown on the Russian Biosatellite Cosmos 2229. NASA TM-110439, 1997, pp. 37, 40–41.
Missions Flown 1991-1995
Bion 10/Cosmos 2229
