Measurement of a single tendon reflex in conjunction with a myogram - The second manned Skylab mission

A generalized hyperreflexia was observed in Skylab 2 crew members immediately postflight. Duration of the Achilles reflex was significantly shortened. Further shortening was observed on the fourth day after recovery. At the 16th and 29th postrecovery days a lengthening of the reflex was observed in two of the three crew members. The muscle potential intervals were shortened immediately postflight and remained shortened throughout the 29 day postflight evaluation period.