Neuroplasticity associated with anterior cruciate ligament reconstruction
journal of orthopaedic & sports physical therapy, 2017•jospt.org
Study Design Controlled laboratory study. Background Anterior cruciate ligament (ACL)
injury may result in neuroplastic changes due to lost mechanoreceptors of the ACL and
compensations in neuromuscular control. These alterations are not completely understood.
Assessing brain function after ACL injury and anterior cruciate ligament reconstruction
(ACLR) with functional magnetic resonance imaging provides a means to address this gap
in knowledge. Objective To compare differences in brain activation during knee …
injury may result in neuroplastic changes due to lost mechanoreceptors of the ACL and
compensations in neuromuscular control. These alterations are not completely understood.
Assessing brain function after ACL injury and anterior cruciate ligament reconstruction
(ACLR) with functional magnetic resonance imaging provides a means to address this gap
in knowledge. Objective To compare differences in brain activation during knee …
Study Design
Controlled laboratory study.
Background
Anterior cruciate ligament (ACL) injury may result in neuroplastic changes due to lost mechanoreceptors of the ACL and compensations in neuromuscular control. These alterations are not completely understood. Assessing brain function after ACL injury and anterior cruciate ligament reconstruction (ACLR) with functional magnetic resonance imaging provides a means to address this gap in knowledge.
Objective
To compare differences in brain activation during knee flexion/extension in persons who have undergone ACLR and in matched controls.
Methods
Fifteen participants who had undergone left ACLR (38.13 ± 27.16 months postsurgery) and 15 healthy controls matched on age, sex, height, mass, extremity dominance, education level, sport participation, and physical activity level participated. Functional magnetic resonance imaging data were obtained during a unilateral knee motor task consisting of repeated cycles of knee flexion and extension.
Results
Participants who had undergone ACLR had increased activation in the contralateral motor cortex, lingual gyrus, and ipsilateral secondary somatosensory area and diminished activation in the ipsilateral motor cortex and cerebellum when compared to healthy matched controls.
Conclusion
Brain activation for knee flexion/extension motion may be altered following ACLR. The ACLR brain activation profile may indicate a shift toward a visual-motor strategy as opposed to a sensory-motor strategy to engage in knee movement.
Level of Evidence
Cohort, level 3. J Orthop Sports Phys Ther 2017;47(3):180–189. Epub 5 Nov 2016. doi:10.2519/jospt.2017.7003
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