Corticomotor Excitability of Gluteus Maximus Is Associated with Hip Biomechanics During a Single-Leg Drop-Jump

Yo Shih; Beth E Fisher; Jo Armour Smith; Christopher M Powers

doi:10.1080/00222895.2020.1723480

Corticomotor Excitability of Gluteus Maximus Is Associated with Hip Biomechanics During a Single-Leg Drop-Jump

J Mot Behav. 2021;53(1):40-46. doi: 10.1080/00222895.2020.1723480. Epub 2020 Feb 24.

Authors

Yo Shih^{1

2}, Beth E Fisher¹, Jo Armour Smith³, Christopher M Powers¹

Affiliations

¹ Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA.
² Department of Physical Therapy, University of Nevada Las Vegas, Las Vegas, NV, USA.
³ Department of Physical Therapy, Crean College of Health and Behavioral Sciences, Chapman University, Orange, CA, USA.

PMID: 32090700
DOI: 10.1080/00222895.2020.1723480

Abstract

The purpose of this study was to determine the association between corticomotor excitability (CME) of gluteus maximus (GM) and hip biomechanics during a single-leg drop-jump task. Thirty-two healthy individuals participated. The slope of the input-output curve (IOC) obtained from transcranial magnetic stimulation was used to assess CME of GM. The average hip extensor moment and peak hip flexion angle during the stance phase of the drop jump task was calculated. The slope of the IOC of GM was found to be a predictor of the average hip extensor moment (r² = 0.18, p = 0.016) and peak hip flexion angle (r² = 0.20, p = 0.01). Our results demonstrate that greater functional use of the hip was associated with enhanced descending neural drive of GM.

Keywords: input-output curve; knee injury; transcranial magnetic stimulation.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adult
Biomechanical Phenomena / physiology
Electromyography
Female
Hip Joint / physiology*
Humans
Leg / physiology*
Male
Motor Activity / physiology*
Motor Cortex / physiology*
Muscle, Skeletal / physiology*
Transcranial Magnetic Stimulation
Young Adult