Kinesiology 361 Chapter : Shoulder

Muscles, ligaments, and joints of the shoulder With Ogrins and Insertions, along with motions each one produces

Glenohumeral Joint

“Shoulder Joint”
Type: Ball and Socket
Three Axis
Movements: Flexion/Extension, Abduction/adduction, Internal/External Rotation, Circumduction

Acromioclavicular joint

Type: Planar
One Axis
Movements: Protraction/Retraction, Elevation/Depression, External/Internal Rotation

Sternoclavicular joint

Type: Saddle Joint
Two Axis
Movements: Protraction/Retraction, Elevation/Depression

Scapulothoracic Articulation

Type: Not a true anatomic joint
Motions: Elevation - Depression
External and Internal Rotation

Movements of the Scapula

1. Protraction/Retraction

2. Elevation/Depression

3. Upward/Downward Rotation

4. Anterior/ Posterior Tilt

Upper Trapezius

Origin(s): Occipital bone and upper c-spine spinous processes

Insertion: Outer third of clavicle, acromion

Movements: Elevation and Adduction

Middle Trapezius

Origin(s): Spinous process C7-T3

Insertion: Spine of scapula

Movements: Adduction and Retraction

Lower Trapezius

Origin(s): Spinous processes mid-lower thoracic

Insertion: Base of scapular spine

Movements: Depression and Adduction

Rhomboid Major / Minor

Origin(s): C7-T5

Insertion: Medial border scapula

Movements: Adduction and Elevation

Anterior Deltoid

Origin(s): Lateral 3^rd of clavicle

Insertion: Deltoid tuberosity

Movements: Flexion

Middle Deltoid

Origin(s): Acromion process

Insertion: Deltoid tuberosity

Movements: Abduction

Posterior Deltoid

Origin(s): Spine of scapula

Insertions: Deltoid tuberosity

Movements: Extension

Levator Scapulae

Origin(s): Transverse processes C1-4

Insertion: Medial border at superior angle

Movements: Elevation

Serratus Anterior

Origin(s): Lateral surface of upper 8 ribs

Insertion: Medial scapular border, anterior

Movements: Abduction

Latissimus Dorsi

Origin(s): Spinous process T7-L5, posterior sacrum, iliac crest, and lower 3 ribs

Insertion: Inferior angle of scapula and Medial floor of bicipital groove

Movements: Extension and Adduction

Pectoralis Minor

Origin(s): Anterior ribs 3-5

Insertion: Coracoid process

Movements: Anterior Tilt

Pectoralis Major

Origin(s): Medial 3^rd of clavicle, sternum, and cartilage of ribs 1-6

Insertion: Lateral edge of bicipital groove

Movements: Flexion, adduction, horizontal adduction

Rotator Cuff Muscles

1. Supraspinatus

2. Infraspinatus

3. Teres Minor

4. Subscapularis

Supraspinatus

Origin(s): Supraspinous fossa

Insertion: Greater tubercle

Movements: Abduction and stabilizes

Infraspinatus

Origin(s): : Infraspinous fossa

Insertion: Greater tubercle

Movements: External Rotation and stabilizes

Teres Minor

Origin(s): Lateral border scapula

Insertion: Greater tubercle

Movements: External rotation and stabilizes

Subscapularis

Origin(s): Subscapular fossa

Insertion: Lesser tubercle

Movements: Internal rotation and stabilizes

Teres Major

Origin(s): Lateral border, inferior angle

Insertion: below lesser tubercle

Movements: Adduction and Extension

Coracobrachialis

Origin(s): Coracoid process

Insertion: Medial surface of mid humerus

Movements: Flexion and Adduction