Muscle Activation of the Lower Limb in Response to a Medio-lateral Imbalance in Monopodal Stance

NCT05080036 | Completed

• 1 other identifier: 957/2020/SPER/AUSLRE
• Study Type: interventional
• Target: 5
• Locations: 1 country
• Sites: 1

Brief Summary

The "static" single-leg stance has been extensively studied in the literature for its relevance in functional evaluation, therapeutic exercise, sports training and research for fall prevention (particularly for the elderly and patients with neurological diseases). However, the motor strategies of the supporting limb have been investigated only at the ankle level. In particular it is not known, at the hip, how the muscular system reacts to medial and lateral imbalances. Colonna has hypothesized, basing on a myofascial chains approach, that the balance is managed by the front and back spiral chains. The aim of the present study is to perform a preliminary experimental analysis to verify Colonna's hypothesis, testing a method for the investigation of motor strategies underlying equilibrium. Five healthy subjects will be examined by means of electromyographic analysis of the gluteus maximus, gluteus medius, adductor longus, tibialis anterior and peroneus longus. Subjects will undergo perturbations of their monopodal balance.

Conditions

Healthy

Keywords

human balance; monopodal stance; electromyography; myofascial chains

Outcome Measures

Primary Outcomes (2)

• Maximum electrical intensity during early response of muscle activation

  The muscles considered will be, for the anterior spiral chain, the adductor longus and the peroneus longus, for the posterior spiral chain, the glutei (medius and maximus) and the tibialis anterior. For each muscle, the intensity will be normalized to the intensity of the maximal contraction. Muscle activity will be evaluated for 1500ms, 500ms before and 1000ms after the thrust. The early response to the stimulus will be identified in the interval of 100-500ms after the thrust.The thrusts will be performed 10 times towards the medial direction and 10 towards the lateral. The median intensity for each direction will be calculated.

  During the procedure

• Correlation of muscle activity

  Correlation coefficients of the activation intensity between each muscle of the hip and each muscle of the ankle: tibialis anterior-glutei; tibialis anterior-adductor longus; peroneus longus-glutei; peroneus longus-adductor longus. Calculated for each imbalance direction.

  During the procedure

Study Arms (1)

Unbalanced healthy subjects

EXPERIMENTAL

Subjects undergo an external perturbation of their balance

Other: Medio-lateral imbalance

Interventions

Medio-lateral imbalance OTHER

Thrust on the pelvis in the medio-lateral direction in order to create a balance perturbation

Unbalanced healthy subjects

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• All healthy subjects

You may not qualify if:

• skeletal pathologies compromising balance
• neuromotor pathologies compromising balance

Sponsors & Collaborators

• Manusapiens: lead

Study Sites (1)

AUSL-IRCCS di Reggio Emilia

Reggio Emilia, 42122, Italy

Location

Related Publications (2)

• Colonna S., 2012. Le catene miofasciali in medicina manuale - Arto inferiore: Ginocchio, Ed. Martina.

  BACKGROUND

• Morey-Klapsing G, Arampatzis A, Bruggemann GP. Joint stabilising response to lateral and medial tilts. Clin Biomech (Bristol). 2005 Jun;20(5):517-25. doi: 10.1016/j.clinbiomech.2005.01.008.

  PMID: 15836939 BACKGROUND

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: NONE
• Purpose: BASIC SCIENCE
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: August 26, 2021
• First Posted: October 15, 2021
• Study Start: August 1, 2021
• Primary Completion: November 1, 2021
• Study Completion: December 30, 2021
• Last Updated: October 17, 2022

Record last verified: 2021-10

Data Sharing

• IPD Sharing: Will not share

Locations

IT (1)