Muscle tightness causing Chest Pain or Shortness of Breath?

Anatomy of pectoralis minor

Pectoralis minor is a small & deep muscle.
Spasm mechanism of this muscle will limit the ability of the rib cage to expand, resulting in Shortness of Breath, spasm pain.

In BENPHYSIO^TM, we believe that when pectoralis minor is involved, we will look into the short head biceps (SHBiceps) and levator scapulae as well (coupling muscles group).
This is because the SHBiceps is attached to coracoid process of scapula.
Both muscles’ contraction can caused scapula protraction.
Besides that, we will look into levator scapulae as this muscle responsible for scapula upward rotation.
We believe that rounded shoulders not only involving scapula protraction but also scapula upward rotation due to the coupling muscles.

Origin: Front 3rd to 5th ribs, close to costal cartilage (Variations in the origin of this muscle in common)

Insertion: Superior - Medial border of coracoid process of scapula

Nerve innervation: Medial pectoral nerve (C8-T1)

Function:

Draws the scapula downward and forward into rib cage
Elevate ribs during abnormal breathing patterns or respiratory distress

Symptoms of pec minor spasm:

Deep chest pain
Unable to elevate shoulder, reaching forward and upward
Numbness through the inner arm, elbow, into wrist, hand and 4th and 5th fingers
Shoulder locked in “Guarding” position
Same side neck rotation pain
Breathing difficulty

Mechanism:

Paradoxical breathing (chest breathing) during respiratory distress.
Overuse of pectoralis major (excessive push up exercise)
Pectoralis minor tightness can be due to poor posture presented with rounded shoulder.

Risk factor:

Scoliosis
Poor shoulder / posture
Chest breathing
Excessive exercise - push up

Pec Minor Tightness Test

Lie down on bed, measure the distance between Tip of Shoulder from bed.

Pec Minor Stretch

Method 1:

Stand at the wall corner (as shown), put both palms on the wall and elbow in 90 degrees.

Move your body forward close to the corner.

Hold for 15s, repeat 3 reps, or more.

Method 2:

Holding both hands together at your back, and stretch it as far back as possible.

Hold for 10-15s, repeat 3 reps, or more.

Can do it in walking, standing or sitting position.

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May 07,2021