Extremely rapid response of various components of quadriceps muscle complex and hamstrings are essential for knee stability during rapid acceleration and deceleration as well as activities requiring sudden change of direction. Intra- and intermuscular co-ordination based on proprioceptive feedback from structures in and around knee (including cruciate ligaments) ensure stability of the knee joint during these activities.
ACL tears are the commonest knee injury among active adults and hamstring tendons are commonly sacrificed for ACL reconstruction.
Does the proprioceptive feedback and inter- as well as intra-muscular co-ordination ever reach the pre-injury level after ACL reconstruction, with neurogenic feedback from both ACL and hamstring tendons being not available? If yes, how long does it take? Any objective evidence available for same in form of EMG studies or any other objective criteria?
Would it be safe to allow full athletic activity before complete restoration of proprioception and muscle co-ordination (a lot of surgeons permit athletic activity at 6 months post-op)? What would be the objective criteria for allowing the same depending on proprioceptive and muscle co-ordination activity?
Hi Dr Kumar,
I found two new paper and may it can help you
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6350662/
Article Quadriceps Strength Deficit at 6 Months After ACL Reconstruc...
Dear Dr Hassan,
Thanks for sharing those interesting papers but unfortunately, they are nowhere near providing answers for the questions I have raised.
I do see a lot of research interest in this question in terms of followers of this question. I wonder if a research collaboration is possible to study these questions at our respective centres?
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