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NCT Number: NCT05513781

Investigation of Factors Causing Knee Hyperextension During Walking in Chronic Stroke Patients

In this study, it is aimed to examine the factors that cause knee hyperextension in chronic stroke patients. Although the presence of weakness or spasticity in the quadriceps muscle, weakness or spasticity in the plantar flexors, and weakness of the dorsiflexors, hamstrings and gastrocnemius muscle are shown in the literature as the cause of hyperextension of the affected knee in hemiplegic patients, there is a comprehensive study that shows the effect of both muscle strength and spasticity in the lower extremity muscles. there are no studies.

The hypotheses of the study are:

Hypothesis 1:

H0: There is no relationship between knee hyperextension in the stance phase of gait and lower extremity muscle strength in stroke patients.

H1: There is a relationship between knee hyperextension in the stance phase of gait and lower extremity muscle strength in stroke patients.

Hypothesis 2; H0: There is no relationship between knee hyperextension in the stance phase of gait and lower extremity spasticity in stroke patients.

H1: There is a relationship between knee hyperextension in the stance phase of gait and lower extremity spasticity in stroke patients.

Hypothesis 3; H0: There is no relationship between knee hyperextension and electromyographic muscle activations in chronic stroke patients.

H1: There is a relationship between knee hyperextension and electromyographic muscle activations in chronic stroke patients.

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Key information

Conditions

Stroke Brain Diseases Cardiovascular Diseases Central Nervous System Diseases Cerebrovascular Disorders Nervous System Diseases Vascular Diseases

Age range

40 year–65 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Hacettepe University

Altındağ, Ankara, 06100, Turkey (Türkiye)

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Being between the ages of 40-65
  • At least 6 months have passed since the stroke
  • Ambulation with or without a walking aid (walker, cane, or tripod)
  • Being between 0-3 points according to the Modified Rankin Score
  • Getting a score of 24 or higher on the Mini Mental Test
  • Presence of hyperextension in the stance phase of gait
  • Volunteering to participate in the study

Exclusion criteria

  • Having a history of more than one stroke
  • Known presence of dementia
  • Having a known orthopedic, psychiatric or other neurological disease
  • Having a situation that prevents communication
  • Having a history of surgery involving lower extremities and gait

Treatment and study plan

Primary outcomes

  1. Movement Analysis

    Time frame: Baseline

    Reflective signs will be placed at certain anatomical points of the participants. Participants will be asked to walk a distance of 5 meters. The three-dimensional positions of these reflective marks will be recorded with the 8-camera Vicon motion capture system. Then it will be examined in computer environment using Blade software.

  2. Electromyographic Measurements

    Time frame: Baseline

    Electromyography (EMG) is frequently used in the literature for motion analysis evaluations. It shows the amplitude of the electrical activity of the muscles. In this study, 8-channel Delsys Bagnoli desktop cable electromyography system (Delsys (Delsys Inc., USA)) will be used. EMG; It shows whether the muscles are active during movement, when they are active and how active they are. In this study, the muscles to be measured by EMG: tibialis anterior, medial gastrocnemius, medial hamstrings, rectus femoris, gluteus medius and the lower part of the latismus dorsi are planned.

Secondary outcomes

  1. Muscle Strength Evaluation

    Time frame: Baseline

    Manual muscle testing will be performed on patients' hip flexors, hip extensors, hip abductors, hip adductors, knee flexors, knee extensors, dorsiflexors, and plantar flexors. A score between 0 and 5 will be given according to the manual muscle test, the ability of the muscles to move against gravity in certain positions, and the resistance of the movement against gravity.

  2. Spasticity Evaluation

    Time frame: Baseline

    The spasticity of the lower extremity muscles (quadriceps, hip extensors, hip adductors, hip internal retractors and plantar flexors) will be evaluated according to the Modified Ashworth Scale. The spasticity assessment will be scored between 0 and 4 according to the resistance of the muscles to passive movement.

Sponsors and collaborators

Lead sponsor

Hacettepe University

Other

Collaborators

  • Atılım University

Registry information

Official study title

Investigation of Factors Causing Knee Hyperextension During Walking in Chronic Stroke Patients by Electromyographic Method

Important dates

Study start
2022
Primary completion
2023
Study completion
2023
First posted
Aug 24, 2022
Registry last updated
Feb 28, 2024

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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