Two techniques for the measurement of the latent times of the Achilles and the patellar tendon reflexes have become more or less standardized in recent years. These are: (1) the recording of the currents of action from the executant muscle; and (2) the recording of the thickening of the muscle itself.
Proceedings of the Iowa Academy of Science
©1933 Iowa Academy of Science, Inc.
Nystrom, Clarence L.
"Are the Response Latencies of the Achilles and Patellar Reflex Responses as Recorded by the Action Current and Muscles Thickening Techniques Comparable?,"
Proceedings of the Iowa Academy of Science, 40(1), 171-174.
Available at: https://scholarworks.uni.edu/pias/vol40/iss1/95