Ulnar nerve adaptation in baseball pitchers

碩士 === 國立陽明大學 === 物理治療暨輔助科技學系 === 100 === Background and purpose: Repeated high stress during pitching may cause adaptive change in the throwing arm. These adaptive changes could improve throwing performance, but they might ultimately lead to injuries. Neural tissues have been suggested to be well e...

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Main Authors: Yu-Tang Wang, 王昱棠
Other Authors: Wen-Yin Chen
Format: Others
Language:zh-TW
Published: 2012
Online Access:http://ndltd.ncl.edu.tw/handle/57278460319761470070
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spelling ndltd-TW-100YM0055950072015-10-13T21:22:39Z http://ndltd.ncl.edu.tw/handle/57278460319761470070 Ulnar nerve adaptation in baseball pitchers 棒球投手尺神經的適應性改變 Yu-Tang Wang 王昱棠 碩士 國立陽明大學 物理治療暨輔助科技學系 100 Background and purpose: Repeated high stress during pitching may cause adaptive change in the throwing arm. These adaptive changes could improve throwing performance, but they might ultimately lead to injuries. Neural tissues have been suggested to be well equipped to tolerate mechanical forces generated during sport activities, but there is no studies exploring if nerve adaptation occurs in pitchers. The purpose of the study is to investigate if ulnar nerve adaptation would occur at the throwing arm with alteration of the mechanosensitivity of the ulnar nerve. Method: This is a single-group repeated-measure study. Twenty six healthy adult baseball pitchers were recruited from amateur or college baseball teams. The mechanosensitivity of the ulnar nerve was denoted by the elbow flexion angle as the subject first experiences sensation of nerve tension (P1), which was measured by the electrogoniometer. Contralateral cervical side bending was used to increase nerve tension while activation of the triceps and pectoralis major muscles was simultaneously monitored with surface electromyography. Two-way analysis of variance with repeated measures was employed to compare the mechanosensitivity of the ulnar nerve and muscles activation between different arms and under different nerve tension conditions. Results: There was a significant side-by-tension condition interaction (p<0.001) ; the average elbow flexion angle decreased 3.7 ± 2.4゚ and 11.3 ± 7.5゚ (p<0.001) in the throwing and non-throwing arm, respectively, after the nerve tension was increased. Muscle activation level of triceps and pectoralis was not different in either side or tension condition. Conclusions: The decrease of the elbow flexion of the throwing arm was significantly smaller than that of the non-throwing arm as the ulnar nerve tension was increased. This difference was unrelated to muscle activation, this results indicates the mechanosensitivity of the ulnar nerve was reduced in the baseball pitchers’ throwing arm. Clinical Relevance: The mechanosensitivity of the ulnar nerve in the throwing arm is lower than that in the non-throwing arm, this nerve adaptive change may improve throwing performance but can also lead to potential injuries. Wen-Yin Chen 陳文英 2012 學位論文 ; thesis 75 zh-TW
collection NDLTD
language zh-TW
format Others
sources NDLTD
description 碩士 === 國立陽明大學 === 物理治療暨輔助科技學系 === 100 === Background and purpose: Repeated high stress during pitching may cause adaptive change in the throwing arm. These adaptive changes could improve throwing performance, but they might ultimately lead to injuries. Neural tissues have been suggested to be well equipped to tolerate mechanical forces generated during sport activities, but there is no studies exploring if nerve adaptation occurs in pitchers. The purpose of the study is to investigate if ulnar nerve adaptation would occur at the throwing arm with alteration of the mechanosensitivity of the ulnar nerve. Method: This is a single-group repeated-measure study. Twenty six healthy adult baseball pitchers were recruited from amateur or college baseball teams. The mechanosensitivity of the ulnar nerve was denoted by the elbow flexion angle as the subject first experiences sensation of nerve tension (P1), which was measured by the electrogoniometer. Contralateral cervical side bending was used to increase nerve tension while activation of the triceps and pectoralis major muscles was simultaneously monitored with surface electromyography. Two-way analysis of variance with repeated measures was employed to compare the mechanosensitivity of the ulnar nerve and muscles activation between different arms and under different nerve tension conditions. Results: There was a significant side-by-tension condition interaction (p<0.001) ; the average elbow flexion angle decreased 3.7 ± 2.4゚ and 11.3 ± 7.5゚ (p<0.001) in the throwing and non-throwing arm, respectively, after the nerve tension was increased. Muscle activation level of triceps and pectoralis was not different in either side or tension condition. Conclusions: The decrease of the elbow flexion of the throwing arm was significantly smaller than that of the non-throwing arm as the ulnar nerve tension was increased. This difference was unrelated to muscle activation, this results indicates the mechanosensitivity of the ulnar nerve was reduced in the baseball pitchers’ throwing arm. Clinical Relevance: The mechanosensitivity of the ulnar nerve in the throwing arm is lower than that in the non-throwing arm, this nerve adaptive change may improve throwing performance but can also lead to potential injuries.
author2 Wen-Yin Chen
author_facet Wen-Yin Chen
Yu-Tang Wang
王昱棠
author Yu-Tang Wang
王昱棠
spellingShingle Yu-Tang Wang
王昱棠
Ulnar nerve adaptation in baseball pitchers
author_sort Yu-Tang Wang
title Ulnar nerve adaptation in baseball pitchers
title_short Ulnar nerve adaptation in baseball pitchers
title_full Ulnar nerve adaptation in baseball pitchers
title_fullStr Ulnar nerve adaptation in baseball pitchers
title_full_unstemmed Ulnar nerve adaptation in baseball pitchers
title_sort ulnar nerve adaptation in baseball pitchers
publishDate 2012
url http://ndltd.ncl.edu.tw/handle/57278460319761470070
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