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1935 Jrnl. Physiol. 85 156 An afferent volley, electrically excited or elicited by a tendon tap, depresses for 30–100 msec. the motor discharge to an extensor muscle.

1967 Brain 90 818 Electromyography..showed a predominance of motor unit potentials of low amplitude (< 50 mv.), short duration (< 3 m.sec.), and high frequency.

1999 Network World (Nexis) 4 Jan. 80 Users reported the system was slowing down. Richert starting measuring network response time and found delays were increasing, from between 2 msec and 4 msec to between 40 msec and 50 msec.