PMID- 37245346
OWN - NLM
STAT- MEDLINE
DCOM- 20230801
LR  - 20230801
IS  - 1873-5711 (Electronic)
IS  - 1050-6411 (Linking)
VI  - 71
DP  - 2023 Aug
TI  - Impact of the contraction of medial forearm muscles during grip tasks in 
      different forearm positions on medial support at the elbow joint.
PG  - 102783
LID - S1050-6411(23)00042-1 [pii]
LID - 10.1016/j.jelekin.2023.102783 [doi]
AB  - We measured the medial joint distance (MJD), activity of muscles involved in 
      medial elbow-joint support, and grip strength, aiming to examine the 
      supportfunction of muscles. MJD was measured in supinated and pronated positions 
      of the forearm of 10 participants under three conditions: at rest (R), under 
      valgus load on the elbow joint (L), and under valgus load on the elbow joint 
      during the grip task (L-grip). Under the L-grip condition, electromyography was 
      performed on flexor digitorum superficialis (FDS), pronator teres (PT), flexor 
      carpi radialis (FCR), and flexor carpi ulnaris (FCU); subsequently, normalized 
      integrated electromyograms (NIEMG) were calculated. Under the L-grip condition, 
      MJD was shorter in the pronated position than in the supinated position (p < 
      0.001); however, grip strength was lower in the pronated position. NIEMG of FDS 
      was 90% in both positions, and those of FCR and FCU were low at 10%. However, 
      that of PT was 3.6% in the supinated position and 40.9% in the pronated position, 
      showing higher NIEMG in the pronated position (p < 0.001). Medial support during 
      grip tasks was higher in the pronated position probably because PT activity 
      compensates for the decreased FDS activity.
CI  - Copyright (c) 2023. Published by Elsevier Ltd.
FAU - Koizumi, Hiroaki
AU  - Koizumi H
AD  - Graduate School of Health and Welfare, Niigata University of Health and Welfare, 
      Niigata, Japan; Tominaga Kusano Hospital, Niigata, Japan.
FAU - Oyama, Mineo
AU  - Oyama M
AD  - Graduate School of Health and Welfare, Niigata University of Health and Welfare, 
      Niigata, Japan. Electronic address: oyama@nuhw.ac.jp.
FAU - Odagiri, Masahiro
AU  - Odagiri M
AD  - Niigata Hand Surgery Foundation, Niigata, Japan.
FAU - Shioda, Noriyuki
AU  - Shioda N
AD  - Niigata Hand Surgery Foundation, Niigata, Japan.
FAU - Fujime, Chihiro
AU  - Fujime C
AD  - Graduate School of Health and Welfare, Niigata University of Health and Welfare, 
      Niigata, Japan.
FAU - Kusano, Nozomu
AU  - Kusano N
AD  - Tominaga Kusano Hospital, Niigata, Japan.
LA  - eng
PT  - Journal Article
DEP - 20230522
PL  - England
TA  - J Electromyogr Kinesiol
JT  - Journal of electromyography and kinesiology : official journal of the 
      International Society of Electrophysiological Kinesiology
JID - 9109125
SB  - IM
MH  - Humans
MH  - *Elbow Joint/physiology
MH  - Forearm/physiology
MH  - Muscle, Skeletal/physiology
MH  - Elbow
MH  - Hand Strength/physiology
MH  - Electromyography
OTO - NOTNLM
OT  - Electromyography
OT  - Flexor-pronator muscles
OT  - Forearm position
OT  - Grip
OT  - Medial elbow-joint support
COIS- Declaration of Competing Interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2023/05/29 00:42
MHDA- 2023/08/01 06:44
CRDT- 2023/05/28 18:04
PHST- 2023/01/19 00:00 [received]
PHST- 2023/05/11 00:00 [revised]
PHST- 2023/05/17 00:00 [accepted]
PHST- 2023/08/01 06:44 [medline]
PHST- 2023/05/29 00:42 [pubmed]
PHST- 2023/05/28 18:04 [entrez]
AID - S1050-6411(23)00042-1 [pii]
AID - 10.1016/j.jelekin.2023.102783 [doi]
PST - ppublish
SO  - J Electromyogr Kinesiol. 2023 Aug;71:102783. doi: 10.1016/j.jelekin.2023.102783. 
      Epub 2023 May 22.