How AMG/SOFi Fits Into a sports Concussion Program

How AMG/SOFi Fits Into a sports Concussion Program

Acoustic Myography (AMG), specifically utilized via the SOFi M2™ system, is a non-invasive diagnostic technology designed to measure skeletal muscle function, coordination, and efficiency in real-time while an athlete is in motion. However, it is critical to understand that SOFi AMG is not an approved or primary tool for detecting concussions.

Acoustic myography (AMG) and AMT’s SOFi system can play a powerful, objective role in detecting concussion‑related neuromuscular impairment in athletes — especially when paired with the kind of baseline testing and return‑to‑play structure described in the MSU concussion program.

Concussion | College of Education | Michigan State University   NFL Concussion Protocol & Return-to-Participation Protocol: Overview

Below is the clearest, research‑aligned explanation of how and why AMG/SOFi can detect concussion effects that traditional tools often miss.

How AMG/SOFi Fits Into a sports Concussion Program

Using MSU’s structure as an example (baseline testing, documentation, removal from play, physician clearance), AMG/SOFi can be integrated at three points:

  1. Preseason Baseline

Athletes complete:

  • Cervical stabilization tests
  • Balance tasks
  • Gait cycles
  • Sport‑specific movement patterns

This creates a neuromuscular fingerprint for each athlete.

  1. Post‑Injury Evaluation

Within 24–72 hours:

  • Repeat the same AMG tasks
  • Compare to baseline
  • Identify neuromuscular deficits even if symptoms are mild or denied

This is especially important because athletes often underreport symptoms.

  1. Return‑to‑Play Clearance

AMG confirms:

  • Neck stabilization has normalized
  • Balance‑related muscle activation is symmetrical
  • Reaction‑related muscle firing matches’ baseline

Why AMG/SOFi Can Detect Concussions

A concussion is a brain injury that disrupts neuromuscular control, balance, coordination, reaction timing, and cervical (neck) stabilization — all of which are highlighted in MSU’s concussion education materials (e.g., slowed response time, lack of coordination, balance issues).

Traditional concussion tools (symptom checklists, cognitive tests, BESS, VOMS) measure:

  • Symptoms
  • Balance errors
  • Eye‑movement function
  • Cognitive processing

But none of them measure the actual muscle activation patterns that change after concussion.

AMG/SOFi fills that gap by capturing:

  • Motor unit recruitment
  • Timing of muscle firing
  • Coordination between muscle groups
  • Fatigue patterns
  • Symmetry between left/right sides

These neuromuscular signatures are highly sensitive to concussion, even when symptoms are mild or athletes try to hide them.

How AMG/SOFi Detects Concussion‑Related Changes

  1. Cervical (Neck) Muscle Dysfunction

Neck muscles are the first line of defense in head acceleration. After concussion, athletes often show:

  • Delayed activation
  • Over‑recruitment (protective co‑contraction)
  • Poor stabilization during movement

AMG/SOFi can detect:

  • Slower firing onset
  • Reduced efficiency (E‑score)
  • Altered recruitment patterns (S‑score)

These changes correlate with concussion‑related vestibular and balance dysfunction.

  1. Balance and Postural Control Deficits

MSU’s concussion program lists lack of coordination and balance as key signs of concussion.

AMG/SOFi can measure:

  • Lower‑extremity muscle activation during single‑leg stance
  • Compensatory firing patterns
  • Asymmetry between limbs
  • Delayed stabilization responses

This provides objective evidence of balance impairment beyond what BESS or sway tests can show.

  1. Gait and Movement Pattern Changes

Concussion often alters:

  • Gait timing
  • Muscle sequencing
  • Efficiency during walking, running, or cutting

AMG/SOFi can detect:

  • Irregular stride‑phase activation
  • Fatigue‑related deterioration
  • Side‑to‑side differences
  • Over‑reliance on certain muscle groups

These subtle deficits can persist even when cognitive tests return to baseline.

  1. Reaction‑Time and Coordination Impairment

MSU’s concussion materials list slowed response time as a hallmark symptom .

AMG/SOFi can quantify:

  • How quickly muscles respond to visual or physical stimuli
  • Whether antagonist/agonist muscles fire in proper sequence
  • Whether reaction patterns match preseason baseline

This makes AMG a physiological reaction‑time test, not just a cognitive one.

  1. Fatigue Sensitivity

Concussed athletes often fatigue faster due to impaired neuromotor control.

AMG/SOFi can detect:

  • Declining efficiency across repetitions
  • Increased noise in muscle activation
  • Loss of coordination under load

Acoustic Myography (AMG), specifically utilized via the SOFi M2™ system, is a non-invasive diagnostic technology designed to measure skeletal muscle function, coordination, and efficiency in real-time while an athlete is in motion.

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