Manual Nerve Mobilization Therapy May Help Resolve Ankle Pain and Instability

 Manual Nerve Mobilization Therapy May Help Resolve Ankle Pain and Instability Blog

Chronic Ankle Instability

Ankle sprains are common sports injuries that occur when the ankle rolls in a lateral motion, doing damage to muscle and connective tissue. Forty percent of patients suffering a lateral ankle sprain develop chronic ankle instability (CAI), which can impede performance, cause ongoing foot and ankle pain, and lead to more injuries down the road.

A suspected catalyst for CAI is peripheral nerve damage that occurs with a lateral ankle sprain. Inflammation and scar tissue at the injury site can reduce the space around a nerve structure, putting pressure on the nerve and interfering with optimal neural function. Remember that your nerves send and receive information to and from your brain, telling your muscles what to do, so a compressed or damaged nerve can undermine normal joint movement and cause instability.

Manual Nerve Mobilization

Manual nerve mobilization is a therapeutic technique applied to the injury site to increase space around an entrapped neural structure, relieving pressure to restore optimal function and reduce foot and ankle pain. Nervous tissue is sensitive and must be mobilized gently. When done correctly, manual nerve mobilization can enhance the outcomes of traditional therapies by helping entrapped nerves function freely.

Combining Exercise with Manual Therapy

Traditional therapy for CAI includes strengthening and balance exercises, along with proprioceptive training. A 2016 study by Plaza-Manzano et al. sought to test the efficacy of manual nerve mobilization treatment when added to conventional therapies.

Fifty-six physically active subjects with CAI were randomly assigned to one of two groups. One group of 28 subjects received a progressive balance program and a progressive strengthening program of the ankle evertors over the course of four weeks. The second group of 28 received the same balance and strengthening programs, but also received manual therapy consisting of grade 3 joint mobilizations and peroneal nerve mobilizations.

Subjects were assessed before and at the end of the four week intervention, and again after one month of treatment. A battery of assessment instruments was used to assess pain, ankle stability, joint range of motion and strength. While both groups improved in all assessment categories, the researchers observed greater improvement in the group who received manual therapy.

The results of this study make a compelling case for the inclusion of manual peroneal nerve mobilization therapy in rehab protocols in the treatment of ankle pain caused by CAI. Combined with therapeutic strengthening and balance exercises, manual nerve mobilization can be a powerful tool to improve ankle stability and relieve foot and ankle pain.

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In this instance, an athlete was originally diagnosed with minor quadriceps muscle strain and was treated for four weeks, with unsatisfactory results. When he came to our clinic, the muscle was not healing, and the patients’ muscle tissue had already begun to atrophy.

Upon examination using MSUS, we discovered that he had a full muscle thickness tear that had been overlooked by his previous provider. To mitigate damage and promote healing, surgery should have been performed immediately after the injury occurred. Because of misdiagnosis and inappropriate treatment, the patient now has permanent damage that cannot be corrected.

The most important advantage of Ultrasound over MRI imaging is its ability to zero in on the symptomatic region and obtain imaging, with active participation and feedback from the patient. Using dynamic MSUS, we can see what happens when patients contract their muscles, something that cannot be done with MRI. From a diagnostic perspective, this interaction is invaluable.

Dynamic ultrasonography examination demonstrating
the full thickness tear and already occurring muscle atrophy
due to misdiagnosis and not referring the patient
to proper diagnostic workup

Demonstration of how very small muscle defect is made and revealed
to be a complete tear with muscle contraction
under diagnostic sonography (not possible with MRI)

image

Complete tear of rectus femoris
with large hematoma (blood)

image

Separation of muscle ends due to tear elicited
on dynamic sonography examination

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