In "Neurophysiological effects of spinal manipulation" written by Joel G. Pickar, numerous studies suggested that spinal manipulation __________ pain tolerance and __________ pain threshold.

In "Neurophysiological effects of spinal manipulation" written by Joel G. Pickar, numerous studies suggested that spinal manipulation __________ pain tolerance and __________ pain threshold. 





(a) decrease ; decrease
(b) increase ; decrease
(c) decrease ; increase
(d) increase ; increase
(e) no change in both









Answer: D


Science

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