<Originals>Middle Latency Cutaneous Reflexes in Intrinsic Human Hand Muscles are Modulated in Badminton Players

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概要

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• The long latency (>50ms) cutaneous reflex was thought to be mediated via transcortical pathways and has been demonstrated to be subject to plastic change while performing a novel task or by motor learning. We hypothesized that the long latency cutaneous reflexes were modulated in skillful badminton players who continue skilful physical training, in particular training of the forearm and hand muscles. Therefore, we compared the organization of long latency cutaneous reflexes in intrinsic hand muscles (first dorsal interosseous muscle; FDI, abductor pollicis brevis; APB and abductor digiti minimi; ADM) following non-noxious electrical stimulation to the digits of the hand (digit 1; D1, digit 2; D2 and digit 5; D5) between control subjects and badminton players. Cutaneous reflexes were elicited while the subjects performed isolated isometric contraction of the APB (D1 abduction), FDI (D2 abduction) and ADM (D5 abduction) muscles. It was found that the magnitude of the excitatory response (latency 〜60ms, E2) in the FDI and APB is significantly larger in normal subjects than in badminton players when the stimulation was applied to an agonist or nearby digit. However, the magnitude of E2 for all muscles was inversely significantly larger in badminton players than in normal subjects when the stimulation was applied to the distal digit. Also, the magnitude of E2 in the APB following D1 stimulation was larger in the right than the left side. These findings suggest that plastic changes in E2 occurred in badminton players to cope with the neural and biomechanical constraints for gripping and swinging a badminton racket.

• 日本運動生理学会の論文

著者

• TAZOE Toshiki

  Division of Health and Sports Education, The United Graduate School of Education, Tokyo Gakugei Univ

• NAKAJIMA Tsuyoshi

  Department of Neurosurgery, Faculty of Medical Sciences, University of Fukui

• Sakamoto Masanori

  Faculty Of Sport Sciences Waseda University

• Komiyama Tomoyoshi

  Chiba University

• Nakajima Tsuyoshi

  Dept. Movement Functions Research Inst. Natl. Rehabil. Ctr.

• Tazoe Toshiki

  Division Of Health And Sports Sciences Faculty Of Education Chiba University

• Tazoe Toshiki

  Division Of Health And Sports Education The United Graduate School Of Education Tokyo Gakugei Univer

• KOMIYAMA Tomoyoshi

  Division of Health and Sports Sciences, Faculty of Education, Chiba University

• TATEMATSU Mikihiro

  Division of Health and Sports Sciences, Faculty of Education, Chiba University

• OMORI Shigeki

  Division of Health and Sports Sciences, Faculty of Education, Chiba University

• Omori Shigeki

  Division Of Health And Sports Sciences Faculty Of Education Chiba University

• Tatematsu Mikihiro

  Division Of Health And Sports Sciences Faculty Of Education Chiba University

• Sakamoto Masanori

  Faculty Of Science Osaka City University

• Nakajima Tsuyoshi

  Department Of Chemistry And Material Engineering Faculty Of Engineering Shinshu University

• Nakajima Tsuyoshi

  Department Of Chemistry And Material Engineering Faculty Of Engineering

• SAKAMOTO Masanori

  Faculty of Education, Kumamoto University

• Nakajima Tsuyoshi

  Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan

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