Brief Title
What is the Effect of Vision on Movement Control in Anterior Cruciate Ligament Reconstructed Patients 7 Months Post-surgery?
Official Title
What is the Effect of Vision on Movement Control in Anterior Cruciate Ligament Reconstructed Patients 7 Months Post-surgery?
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
Detailed Description
This study will compare a male ACLR cohort against matched healthy controls. The study
population will be between 18-35 year old males who are competing multi-directional field
sport. The ACLR cohort will be 7 months post-surgery. The main outcome measure will be time
to stability during the stepdown task (from a 20cm step). The stepdown task will be completed
first with their eyes open and then with their eyes closed, thereby allowing for the creation
of an index reporting how time to stability changes following the obstruction of vision.
Strength and lower limb power measures will be collected as potential confounding factors.
The testing battery that participants complete are:
- visual processing ability via a sensory station which contains neurocognitive and visual
acuity testing
- 3D biomechanical tests:
1. double leg countermovement jump
2. single leg countermovement jump
3. double leg drop jump
4. single leg drop jump
5. stepdown test (eyes open and eyes closed)
6. joint position sense test
7. single leg balance (eyes open and eyes closed)
- isokinetic strength testing of quadriceps and hamstrings at 60deg/sec. 3 sets of 5
- questionnaires:
1. international knee documentation committee
2. tampa scale of kinesiophobia
3. ACL- return to sport after injury
Study Type
Observational
Primary Outcome
Time to stability during stepdown task (eyes open versus eyes closed)
Secondary Outcome
Joint position sense testing
Condition
ACL
Study Arms / Comparison Groups
ACLR group
Description: Individuals who are 7 months post primary ACLR
Publications
* Includes publications given by the data provider as well as publications identified by National Clinical Trials Identifier (NCT ID) in Medline.
Recruitment Information
Estimated Enrollment
90
Start Date
December 2021
Completion Date
December 2022
Primary Completion Date
September 2022
Eligibility Criteria
Inclusion Criteria:
- 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
Exclusion Criteria:
- 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
Gender
Male
Ages
18 Years - 35 Years
Accepts Healthy Volunteers
Accepts Healthy Volunteers
Contacts
, 00 353 1 526 2030, [email protected]
Location Countries
Ireland
Location Countries
Ireland
Administrative Informations
NCT ID
NCT05121857
Organization ID
SSC-ACL-002
Responsible Party
Sponsor
Study Sponsor
Sports Surgery Clinic, Santry, Dublin
Study Sponsor
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Verification Date
November 2021