03/09/2026
When the ACL tears, the brain pulls the emergency brake. So relevant after many forms of acute trauma to a human.
There’s a phenomenon called arthrogenic muscle inhibition (AMI): the nervous system, sensing joint trauma, reflexively shuts down the surrounding musculature to prevent further damage. In the case of an ACL reconstruction, the quadriceps are often the first to go offline. It’s not weakness (even though it feels and looks like it.) It’s protection!
AMI… which honestly feels a bit like my nervous system asking: “Am I really safe?” Sweet body, trying to protect me.
Which means ACL rehabilitation is both rebuilding strength and re-establishing trust between the brain and the body for stability and spontaneous movements.
One of the most powerful tools in early ACL recovery is neuromuscular electrical stimulation (NMES). By sending small, controlled electrical signals into the muscle, we create a safe environment for the nervous system to practice contraction again, essentially bypassing the inhibition pattern and reminding the tissue it’s allowed to fire. Funnily enough you need more stimulation the more connected the brain is to the quad because it’s like, you can’t fool me. I know when I need to turn on! I thought it would be the opposite! So how we rehab- first stim, then I push my knee down and activate my quad more and then I hold it until the stim stops. Tada!
“The threat has passed.
You can come back online.”
Today I practiced walking without crutches!
Each step right now is less about strength and more about rebuilding the neurological pathways that allow the brain and body to move together again.
Rehab, at its core, is a conversation. Let me build back the confidence from accumulating evidence during rehabilitation with expert guides.
