Adaptation of Neural Common Drive to Motor Units of the Wrist Extensor Agonists in Chronic Lateral Epicondylitis.
Purpose: Chronic lateral epicondylitis (CLE) arises from overuse and repetitive strain on the extensor carpi radialis brevis (ECRB), particularly prevalent among racquet sport athletes. Methods: Given the compensatory workload on a weakened ECRB, this study specified how CLE influences muscle synerg...
| Publicado en: | Medicine & Science in Sports & Exercise Vol. 58; no. 8; pp. 1703 - 1713 |
|---|---|
| Autores principales: | , , , , |
| Formato: | pictorial research tables/charts tracings Journal Article |
| Publicado: |
Lippincott Williams & Wilkins
Aug2026
|
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=195364095&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 195364095 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01959131 4DP jtl: Medicine & Science in Sports & Exercise issn: 01959131 maglogo: N pubinfo: dt: Aug2026 vid: 58 iid: 8 pid: 433 pub: Lippincott Williams & Wilkins place: Baltimore, Maryland artinfo: ui: 195364095 195364095 195364095 10.1249/MSS.0000000000003993 195364095 ppf: 1703 ppct: 10 formats: tig: atl: Adaptation of Neural Common Drive to Motor Units of the Wrist Extensor Agonists in Chronic Lateral Epicondylitis. aug: au: CHEN, YI-CHING CHEN, YUEH WU, CHIA-CHAN HU, CHIA-LING HWANG, ING-SHIOU affil: Department of Physical Therapy, College of Medical Science and Technology, Chung Shan Medical University, Taichung City, TAIWAN sug: subj: Chronic Disease Tennis Elbow Physiopathology Adaptation, Physiological Evaluation Neural Conduction Evaluation Motor Unit Physiopathology Wrist Joint Physiopathology Extension Muscle, Skeletal Physiopathology Muscle, Skeletal Innervation Human Male Female Adult Middle Age Funding Source Task Performance and Analysis Questionnaires Visual Analog Scaling Electromyography Pressure (Physiology) Unpaired T-Tests Comparative Studies Paired T-Tests Pearson's Correlation Coefficient Post Hoc Analysis Association (Research) Descriptive Statistics Correlational Studies Adult: 19-44 years Middle Aged: 45-64 years Male Female ab: Purpose: Chronic lateral epicondylitis (CLE) arises from overuse and repetitive strain on the extensor carpi radialis brevis (ECRB), particularly prevalent among racquet sport athletes. Methods: Given the compensatory workload on a weakened ECRB, this study specified how CLE influences muscle synergy through the neural common drive to motor units (MUs) in both the ECRB and extensor carpi radialis longus (ECRL). Eighteen patients with CLE (49.5 ± 9.2 yr) and eighteen healthy participants (48.8 ± 10.4 yr) took part in the study. The force dynamics and discharge characteristics of MUs in the agonists were compared between the patient and control groups during a graded force-increasing task. Results: Patients with CLE showed significantly greater task errors (P = 0.005) with smaller mean frequency (MF) of force fluctuations (P = 0.006) than healthy controls. In addition to reduced maximal voluntary contraction, patients exhibited a lower common drive index (CDI) within the ECRB (P = 0.001) and between the ECRB and ECRL (P = 0.007), with no significant difference observed in the CDI within the ECRL (P > 0.05). The coefficient of variation of the CDI among MU pairs was significantly lower in the patient group for both within the ECRB (CV-CDIECRB) (P < 0.001) and between the ECRB and ECRL (CV-CDIECRB-ECRL) (P = 0.004). Functionally, the size of task errors was negatively correlated with CV-CDIECRB and CV-CDIECRB-ECRL (P < 0.05), while mean frequency of force fluctuations was positively correlated with CV-CDIECRB. Conclusions: Impaired force control in CLE is associated with altered variability and coordination of common synaptic input, highlighting the relevance of coordination-focused rehabilitation strategies. pubtype: Academic Journal doctype: pictorial research tables/charts tracings Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|