MUSCULAR SYSTEM & SENSORY MOTOR CONTROL (SOMATIC PERSPECTIVE)

Somatic yoga views the muscular system not only as a collection of tissues responsible for movement but as a dynamic neuromuscular network controlled by the brain. The focus is on how muscles contract, release, coordinate, and adapt based on patterns learned through life experiences, posture, emotions, and habits.

1. Tonic vs Phasic Muscles

In somatic theory, muscles are generally categorized into two functional groups: Tonic Muscles

• Designed for postural support and endurance
  • Work at low levels for long periods
  • Resist gravity
  • Often become shortened and overactive due to habit or stress
  • Examples: psoas, erector spinae, quadratus lumborum, upper trapezius, hamstrings Phasic Muscles
  • Designed for movement and rapid response
  • Contract powerfully but fatigue easily
  • Often become weakened or inhibited when tonic muscles dominate
  • Examples: gluteus maximus, lower trapezius, rhomboids, abdominal stabilizers Somatic Insight

Most posture and movement dysfunctions arise when tonic muscles become chronically contracted and phasic muscles fail to engage properly. Somatic yoga restores balance by releasing the tonic system and reawakening phasic muscles through slow, mindful movement.

• Muscle Holding Patterns

Muscle holding patterns are habitual contractions maintained unconsciously. Causes

• Repetitive daily activities
  • Emotional stress or trauma
  • Poor posture
  • Injury compensation
  • Long-term stress responses (fight/flight/freeze) Nature of Holding Patterns
  • They occur below conscious awareness

• They become the body’s “default” tone
  • They restrict mobility, breath, and sensory accuracy
  • They create distorted movement patterns Somatic Approach

Through slow movement, breath awareness, and mindful sensing, students learn to identify their holding patterns—neck, jaw, shoulders, lower back, hips—and gradually release them.

• Chronic Muscular Contraction

Chronic contraction occurs when muscles remain partially or fully contracted even when they should be resting.

Characteristics

• Persistent tightness
  • Loss of joint mobility
  • Fatigue and pain
  • Decreased blood flow
  • Reduced sensory clarity
  • Increased stress load on the nervous system Why It Happens

The brain “forgets” how to relax these muscles due to:

• Long-term stress
  • Ongoing posture habits
  • Injury patterns
  • Emotional guarding Somatic View

Chronic contraction is not solved by stretching, because stretching often fights the contraction. Instead, somatics uses pandiculation—a conscious contraction followed by slow release—which resets the muscle’s resting length in the brain.

• Sensory-Motor Amnesia (SMA)

A core concept in somatic education, SMA describes the loss of voluntary control over certain muscle groups due to habituated patterns.

What SMA Means

• The brain loses full sensory awareness of the muscle
  • The brain loses full motor control of that muscle
  • The muscle stays stuck in contraction
  • The person believes they are “tight” or “stiff,” but the issue is neurological Common Signs of SMA
  • Difficulty feeling or isolating a movement
  • Feeling “frozen” or restricted
  • Pain when trying to move normally
  • Postural distortions (ex: swayback, rounded shoulders, tilted pelvis) Sources of SMA
  • Trauma
  • Repetitive work patterns
  • Emotional suppression
  • Sedentary lifestyle
  • Protective reflexes (startle, withdrawal, fight-flight) Somatic Solution

Pandiculation, slow awareness-based movement, and sensory reintegration exercises restore voluntary control and break the cycle of SMA.

• Releasing Habitual Tension Through Awareness

Somatics teaches that muscular tension cannot be eliminated by force; it dissolves through sensory clarity, control, and nervous system recalibration.

How Awareness Releases Tension

1. Brings the unconscious into consciousness
   1. Students feel tension they didn’t know they were holding.
2. Interrupts automatic patterns
   1. Awareness breaks the loop of habitual contraction.
3. Improves sensory feedback
   1. The brain senses the real state of the muscle, enabling voluntary release.
4. Activates parasympathetic response
   1. Softens bracing and guarding instinctively.
5. Reeducates the motor cortex
   1. Movement becomes smoother, more efficient, and pain-free.

Somatic Practices to Release Tension

• Pandiculation
  • Slow, small, mindful movements
  • Pausing to sense the body after movement
  • Breath-focused release
  • Body scanning
  • Micro-movements around joints
  • Exploring movement without force or goals

Somatic release restores freedom, reduces pain, and helps students inhabit their bodies with greater clarity and ease.