What is the Effect of Vision on Movement Control in Anterior Cruciate Ligament Reconstructed Patients 7 Months Post-surgery?

NCT05121857 | Unknown

• 1 other identifier: SSC-ACL-002
• Study Type: observational
• Target: 90
• Locations: 1 country
• Sites: 1

Brief Summary

The anterior cruciate ligament (ACL) is thought to have two main roles within the body: (1) providing a physical restraint to excessive rotation and forwards translation within the knee and (2) providing sensory information to the sensorimotor cortex (contributes to motor planning and motor task execution). Therefore, an ACL injury is thought to be not just a physical injury but also one which affects an individual's ability to plan and execute motor tasks. It has been suggested in previous research that following an ACL injury and even post-ACL reconstruction, individuals may become reliant on the visual-motor system when planning and executing movements. Therefore, this study aims to compare an ACLR population against healthy controls to see if it is possible to identify those who may be visually-motor reliant by accessing movement control in the absence of vision

Conditions

ACL

Outcome Measures

Primary Outcomes (1)

• Time to stability during stepdown task (eyes open versus eyes closed)

  Participants will stepdown from a 20cm box and land on one leg. Participants will be advised to achieve stability as quickly as possible and then to remain in that position for 20 seconds. Participants will complete 3 trials on each leg first with their eyes open and then a further 3 trials on each leg whilst blindfolded. Participants will perform this test in the 3D lab utilising using an eight-camera motion analysis system (200Hz: Bonita-B10, Vicon, UK)

  at 7 months post-ACLR

Secondary Outcomes (13)

• Joint position sense testing

  at 7 months post-ACLR

• single leg balance (eyes closed versus eyes open)

  at 7 months post-ACLR

• Quadriceps and hamstrings strength

  at 7 months post-ACLR

• Countermovement jump- double leg and single leg

  at 7 months post-ACLR

• Drop jump- double leg and single leg

  at 7 months post-ACLR

Study Arms (2)

ACLR group

Individuals who are 7 months post primary ACLR

healthy control group

Healthy uninjured individuals who are actively playing sport and have not sustained any knee injuries, ankle injuries or concussions.

Eligibility Criteria

• Age: 18 Years - 35 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)
• Sampling Method: Non-Probability Sample

Study Population

Patients would be recruited from those undergoing an ACLR under the care of orthopaedic surgeons at the Sports Surgery Clinic (Dublin, Ireland). At present, patients attend the Sports Medicine Department at Sports Surgery Clinic for strength, power and 3D biomechanical analysis at 7 months post-operatively prior to their reviews with their surgeon

You may qualify if:

• Aged 18-35 years old
• Playing club level Gaelic football or hurling
• They must report that they intend on returning to sport at the same or higher level
• Able to give written informed consent and to participate fully in the interventions
• At 7 months biomechanical testing, individuals would need to have 70% symmetry of both quadriceps and hamstring peak torque as measured on our isokinetic dynamometer with the angular velocity set to 60°/s
• Individuals should have already commenced linear running and double leg jumping tasks as part of their rehabilitation
• They are currently attending a gym or can attain gym access for the duration of intervention period

You may not qualify if:

• They have not commenced running or jumping in their rehabilitation
• Revision ACL
• They underwent concurrent meniscal repair, chondral repair or extra-articular augmentation
• Serious medical conditions preventing them from completing high intensity resistance exercise
• Any previous: injuries to the visual system, concussion, head injury, unexplained seizures or epilepsy
• Any previous ankle or knee injuries
• Those who are uncomfortable or do not want to hop with their eyes closed (one of the assessment tasks will involve hopping on one leg with their eyes open and followed by another set in which their eyes are closed

Sponsors & Collaborators

• Sports Surgery Clinic, Santry, Dublin: lead

Study Sites (1)

Sports Surgery Clinic

Dublin, Leinster, Ireland

RECRUITING

Central Study Contacts

Andy D Franklyn-Miller, MBBS

CONTACT

00 353 1 526 2030; afranklynmiller@me.com

Enda A King, BSc, MSc

CONTACT

00 353 1 526 2030; endaking@sportssurgeryclinic.com

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: November 3, 2021
• First Posted: November 16, 2021
• Study Start: December 1, 2021
• Primary Completion: September 1, 2022
• Study Completion: December 1, 2022
• Last Updated: December 15, 2021

Record last verified: 2021-11

Locations

IE (1)