9.5 Coordinated Movement Patterns & Motor Control Retraining

9.5 Coordinated Movement Patterns & Motor Control Retraining

Core Clinical Mandate: "Coordinated movement patterns" sits inside Neuromuscular Rehabilitation (11%). Coordination is not strength and it is not flexibility — it is the timing, sequencing, and relative magnitude of muscle activity. A patient can be strong, mobile, and still move badly, and it is the bad movement that keeps reproducing the injury.

---

Feedforward Control: The Timing Problem

In healthy individuals, deep stabilizing muscles activate before the prime mover that will perturb the spine. Raise your arm rapidly and the transversus abdominis and lumbar multifidus fire in advance of the deltoid, in an anticipatory (feedforward) manner that is independent of the direction of arm movement.

In people with chronic low back pain this anticipatory activation is delayed or absent, so the spine is loaded before it is stabilized. Crucially:

• The delay is a timing fault, not a strength fault. The muscle may be perfectly capable of generating force; it simply fires late.
• This is why heavy global trunk strengthening alone frequently fails to resolve recurrent low back pain, and why retraining begins with low-load, precisely cued activation before progressing to load.
• Pain, effusion, and fear all disrupt feedforward timing, and the timing fault can persist after the pain episode resolves — a plausible contributor to recurrence.

Local vs. Global Muscle Systems

The characteristic dysfunction is local inhibition with global substitution: the deep system switches off, the superficial system braces to compensate, and the patient ends up stiff, guarded, and still unstable segmentally.

---

Developmental Kinesiology and Dynamic Neuromuscular Stabilization

Developmental kinesiology observes that the stabilizing patterns an infant acquires in the first year — head control, sagittal stabilization at around 3 months, ipsilateral and contralateral patterns, quadruped, and finally upright locomotion — are genetically determined templates of coordinated movement.

Dynamic Neuromuscular Stabilization (DNS), developed from Vojta's and Kolar's work at the Prague School, uses those developmental positions as exercise positions. Its two central ideas are testable:

• Integrated spinal stabilization requires coordinated function of the diaphragm, pelvic floor, transversus abdominis, and multifidus acting as a pressurized cylinder. Intra-abdominal pressure regulation, not bracing hard, is the objective.
• Breathing pattern is part of stability. A patient who elevates the ribs and shoulders to inhale (an apical or "paradoxical" pattern) cannot generate correct intra-abdominal pressure. Restoring diaphragmatic, lower-rib lateral expansion is often the first intervention, before any exercise is loaded.

Positions such as 3-month supine support, side-lying, quadruped rocking, and the bear position are used to re-establish these patterns with the nervous system in a familiar template.

---

Proprioceptive Neuromuscular Facilitation Patterns

PNF exploits the fact that functional movement is spiral and diagonal, not cardinal-plane. Each pattern combines flexion or extension, abduction or adduction, and rotation simultaneously.

The Upper Extremity Diagonals

Core PNF Techniques

• Rhythmic initiation: passive → active-assisted → active → resisted movement through the pattern. Used when a patient cannot initiate movement or moves with apprehension.
• Repeated contractions: a quick stretch is applied at the point of weakness within the range to facilitate the motor pool and drive the movement through.
• Slow reversals: alternating resisted agonist and antagonist contractions without pause, developing reciprocal coordination and endurance.
• Rhythmic stabilization: alternating isometric resistance in multiple directions with no movement permitted. The single best technique for training co-contraction and joint stability, and the one most likely to be asked about.
• Hold-relax and contract-relax: the range-gaining techniques driven by autogenic inhibition.
• Hold-relax with agonist contraction: adds active contraction of the opposite muscle to recruit reciprocal inhibition on top of autogenic inhibition.

Irradiation (overflow) is the PNF principle that strong resistance applied to an intact, strong segment produces facilitation that spreads to weaker muscles in the same pattern — clinically useful for activating a weak muscle that cannot yet respond to direct resistance.

---

Plyometrics and the Stretch-Shortening Cycle

Plyometric training develops rate of force development by exploiting the stretch-shortening cycle (SSC), which has three phases:

1. Eccentric (loading) phase — the muscle-tendon unit is rapidly lengthened, storing elastic strain energy in the series elastic component and loading the muscle spindles.
2. Amortization phase — the transition from lengthening to shortening. This must be brief. If the amortization phase is prolonged, stored elastic energy dissipates as heat and the spindle contribution is lost, and the movement becomes an ordinary concentric effort.
3. Concentric (unloading) phase — the shortening contraction, now augmented by released elastic energy and by the myotatic reflex.

Prerequisites before prescribing plyometrics:

• Demonstrated eccentric control — a slow, controlled single-leg lowering without valgus collapse or trunk compensation.
• Adequate strength base, commonly expressed as the ability to squat a meaningful multiple of body weight or to demonstrate limb symmetry within roughly 10 to 15% on functional testing.
• Full pain-free range and no effusion.
• Correct landing mechanics first — plyometric progression always begins with teaching absorption (drop and stick) before adding rebound.

Progression: double-leg in place → double-leg with travel → single-leg in place → single-leg with travel → depth jumps and reactive multi-response drills. Volume is counted in foot contacts, with generous recovery between sets, and plyometric sessions are separated by at least 48 hours.

The Sequencing Rule Again: Eccentric control precedes plyometric loading, always. A patient who cannot control a slow single-leg descent has no business performing depth jumps, because the landing is an uncontrolled single-leg descent at several times body weight.

---

Retraining Sequence for Coordinated Movement

1. Restore breathing and intra-abdominal pressure. Teach diaphragmatic, lateral lower-rib expansion in supine before anything is loaded.
2. Isolate the inhibited muscle. Low-load, precisely cued activation of transversus abdominis, multifidus, deep cervical flexors, or gluteus medius, with palpation and biofeedback. Verify the patient can activate it without global substitution.
3. Integrate into a pattern. Add limb loading onto the maintained deep activation — dead bug, bird dog, side bridge progressions — keeping the spine in neutral.
4. Add the developmental and diagonal patterns. Quadruped rocking, bear position, PNF diagonals, chopping and lifting patterns.
5. Load the pattern. Squat, hinge, lunge, push, pull, and carry, with the coordination preserved under progressively heavier load.
6. Add speed, then unpredictability. Rhythmic stabilization, perturbation, reactive cutting and landing.
7. Add dual-task and context. Cognitive load and the real environment, because coordination that survives only in a quiet clinic has not transferred.

Throughout, quality gates progression. The moment the pattern breaks — the ribs flare, the spine loses neutral, the knee collapses medially, the breath is held — the load or speed has exceeded the patient's current motor control and must be reduced.