Effects of Visual Feedback on Angular Error

NCT07386977 | Active Not Recruiting

• 1 other identifier: LHU-FTR-ZSBD-04
• Study Type: observational
• Target: 120
• Locations: 1 country
• Sites: 1

Brief Summary

With this study is to evaluate knee joint position sense in patients with gonarthrosis under conditions with and without visual input.

Conditions

Knee Osteoarthritis; Gonarthrosis

Keywords

knee osteoarthritis; proprioception; angular error; joint position sense; gonarthrosis

Outcome Measures

Primary Outcomes (1)

• Proprioception Measurement

  During the measurement, the inclinometer was aligned so that its axis passed through the knee joint line, and it was positioned on the proximal one-third of the fibula and secured in place using a strap. Measurements were performed both with visual input and with visual input eliminated. After reaching the target position, the participant maintained the final position for 5 seconds before returning to the starting position.

  Each measurement was repeated three times with 1-minute intervals between trials. A 2-minute rest period was allowed between conditions involving changes in visual input.

Study Arms (2)

1-Knee Joint Position Evaluation with Visual Input

The participant was instructed, in a seated position, to extend the knee from the starting position of 90° knee flexion until reaching the target angle of 30° knee flexion.

2-Knee Joint Position Evaluation without Visual Input

The participant was instructed, in a prone position, to move the knee from the starting position of 90° knee flexion to the target angle of 30° knee flexion.

Eligibility Criteria

• Age: 40 Years - 80 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Participants diagnosed with knee osteoarthritis according to Kellgren-Lawrence grades 1-3 were included in the study.

You may qualify if:

• Age between 40 and 80 years,
• A confirmed diagnosis of knee osteoarthritis,
• Absence of any health condition that could interfere with the measurement procedures.

You may not qualify if:

• Refusal to participate in the study,
• Presence of a diagnosed neurological disorder that could affect the measurements,
• Presence of cardiopulmonary instability that could influence the measurements,
• History of knee-related trauma within the past year,
• Receipt of physiotherapy or rehabilitation treatment within the past year,
• History of knee-related surgery,
• Inability to follow verbal instructions due to insufficient cognitive function.

Sponsors & Collaborators

• Lokman Hekim University: lead

Study Sites (1)

Lokman Hekim University

Ankara, Turkey (Türkiye)

Location

MeSH Terms

Conditions

Osteoarthritis, Knee

Condition Hierarchy (Ancestors)

Osteoarthritis; Arthritis; Joint Diseases; Musculoskeletal Diseases; Rheumatic Diseases

Study Officials

• ZAHİDE SEDA BAKTIR DOĞAN, Assist. Prof

  Lokman Hekim University

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER GOV
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Assist. Prof.

Study Record Dates

• First Submitted: January 28, 2026
• First Posted: February 4, 2026
• Study Start: March 1, 2025
• Primary Completion: May 30, 2026
• Study Completion (Estimated): June 30, 2026
• Last Updated: February 4, 2026

Record last verified: 2026-01

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)