Shoulder Force Couples

GLENOHUMERAL

MOTION

GLENOHUMERAL

MUSCLES

SCAPULAR MOTION

PERISCAPULAR MUSCLES

Abduction

Deltoid/Supraspinatus initiate.

Subscapularis, Infraspinatus, Teres Minor Compress and Depress humeral head

Upward Rotation

Posterior Tilt

Upper and Lower Trapezius and Serratus Anterior

Adduction

Latissimus Dorsi

Teres Minor

Pectoralis Major

Subscapularis,

Infraspinatus, Teres minor stabilize Humeral Head

Downward

Rotation

Depression

Pectoralis Minor

Rhomboids

Levator Scapula

Flexion

Anterior/Medial

Deltoid

Clavicular Pectoralis

Supraspinatus

Long Head of Biceps

Brachi

Coracobrachialis

Infraspinatus, Teres Minor and Subscapularis

Stabilize Humeral Head

Posterior Tilt

Upward Rotation

Serratus Anterior

Upper and Lower Trapezius

Extension

Latissimus Dorsi

Teres Major

Sternal Pectoralis

Long Head of Triceps

Brachi

Posterior Deltoid

Infraspinatus, Teres Minor and Subscapularis

Stabilize Humeral Head

Anterior Tilt

Downward Rotation

Depression

Pectoralis Minor

Pectoralis Minor,

Rhomboids,

Levator Scapula

Pectoralis Minor

Lower Trapezius

Horizontal Flexion

Internal Rotation

Pectoralis Major

Subscapularis

Protraction

Serratus Anterior

Horizontal Extension

External Rotation

Posterior Deltoid,

Infraspinatus, Teres Minor

Infraspinatus, Teres Minor

Retraction

Mid Trapezius

Rhomboids