Nakata Hiroki, Aoki Mai, Sakamoto Kiwako
Faculty of Human Life and Environment, Nara Women's University, Nara City, Japan.
Faculty of Human Life and Environment, Nara Women's University, Nara City, Japan.
Neurosci Res. 2017 Apr;117:28-34. doi: 10.1016/j.neures.2016.12.002. Epub 2016 Dec 7.
The aim of the present study was to investigate the effects of mastication on somatosensory processing using somatosensory-evoked potentials (SEPs). Fourteen healthy subjects received a median nerve stimulation at the right wrist under two conditions: Mastication and Control. SEPs were recorded in five sessions for approximately seven minutes: Pre, Post 1, 2, 3, and 4. Subjects were asked to chew gum for five minutes after one session in Mastication. Control included the same five sessions. The amplitudes and latencies of P14, N20, P25, N35, P45, and N60 components at C3', frontal N30 component at Fz, and P100 and N140 components at Pz were analyzed. The amplitude of P45-N60 was significantly smaller at Post 1, 2, 3, and 4 than at Pre in Control, but not in Mastication. The latency of P25 was significantly longer at Post 2, 3, and 4 than at Pre in Control, but not in Mastication. The latency of P100 was significantly longer at Post 2 than at Pre in Control, but not in Mastication. These results suggest the significant effects of mastication on the neural activity of human somatosensory processing.
本研究的目的是使用体感诱发电位（SEP）来研究咀嚼对体感加工的影响。14名健康受试者在两种条件下接受右手腕正中神经刺激：咀嚼和对照。在五个时段记录SEP，时长约7分钟：刺激前、刺激后1、2、3和4。在咀嚼条件下，受试者在一个时段后被要求咀嚼口香糖5分钟。对照条件包括相同的五个时段。分析了C3'处P14、N20、P25、N35、P45和N60成分的波幅和潜伏期，Fz处额部N30成分，以及Pz处P100和N140成分。在对照条件下，刺激后1、2、3和4时P45-N60的波幅显著小于刺激前，但在咀嚼条件下并非如此。在对照条件下，刺激后2、3和4时P25的潜伏期显著长于刺激前，但在咀嚼条件下并非如此。在对照条件下，刺激后2时P100的潜伏期显著长于刺激前，但在咀嚼条件下并非如此。这些结果表明咀嚼对人体体感加工的神经活动有显著影响。
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