Maillou P, Cadden S W
Oral Physiology and Gerontology Research Group, Dental School, University of Dundee, Park Place, Scotland, UK.
Arch Oral Biol. 1997 Apr;42(4):323-7. doi: 10.1016/s0003-9969(97)00023-x.
The effects on a inhibitory jaw reflex of activating deep somatic afferent nerves in a remote part of the body (the arm) were studied in 13 humans. Electromyographic recordings were made from the active masseter of the long-latency (mean 42.0 +/- 1.1 ms) inhibitory reflex evoked by electrical stimulation of the upper lip. Immediately after a 1-min conditioning period during which the participants compressed a hand-held spring once a second while ischaemia was produced in the arm with an inflated pneumatic cuff, the magnitude of the inhibitory reflex decreased significantly (by 43%). The reflex recovered within 5 min to a magnitude that was not significantly different from its pre-conditioning value. The arm exercise or the ischaemia alone produced no significant changes in the reflex. Furthermore, neither of these last two conditions was reported to be painful, whereas the ischaemic exercise produced pain in all but one participant. It is concluded that activation of remote nociceptive, but not non-nociceptive, deep somatic nerves can modulate jaw reflexes in man.
在13名受试者中研究了激活身体远端部位（手臂）的深部躯体传入神经对抑制性下颌反射的影响。通过电刺激上唇诱发长潜伏期（平均42.0±1.1毫秒）抑制性反射，从主动收缩的咬肌进行肌电图记录。在1分钟的条件刺激期内，参与者每秒压缩一次手持弹簧，同时用充气的气动袖带使手臂产生缺血，在此之后，抑制性反射的幅度显著降低（降低了43%）。反射在5分钟内恢复到与条件刺激前的值无显著差异的幅度。单独的手臂运动或缺血对反射没有显著影响。此外，据报告，这后两种情况都不会引起疼痛，而缺血性运动除一名参与者外，在所有参与者中都会引起疼痛。结论是，激活远端伤害性而非非伤害性深部躯体神经可以调节人类的下颌反射。
