EXSC333 - Upper Extremity Practical

Pectoralis Minor

O: Anterior RIbs 3-5

I: Coracoid Process

A: Scapular abduction (Protraction), Downward rotation, depression

Serratus Anterior

O: Upper 8-9 ribs

I: Medial Boarder of Scapula

A: Scapular Abduction (Protraction), Upward Rotation

Subclavius

O: Inferior Groove of Clavicle

I: 1st Rib @ junction with costal cartilage

A: Clavicle Depression; stabilizes SC Joint

Trapezius (Upper

O: Occipital Bone

I: Posterior border of Clavicle and Acromion

A:Scapular Elevation; extension and rotation of head/neck

Trapezius (Middle)

O: Spinus processes of C7-T3

I: Medial border of Acromion and Scapular Spine

A: Scapular Adduction (retraction), elevation, upward rotation

Trapezius (Lower)

O: Spinous Process of T4-T12

I: Base of Scapular Spine

A: Scapular Depression, Adduction (retraction, Upward Rotation

Levator Scapulae

O: Transverse Process of C1-C4

I: Medial border of Scapula (above spine)

A: Scapular Elevation, Assits downward rotation

Rhomboids

O: Spinous Process of C7-T5

I: Medial border of Scapula (Below spine)

A: Scapualr Adduction (Retraction), downward rotation

Supraspinatus

O: Medial Supraspinus Fossa

I: Greater Tubercle of Humerus

A: Shoulder Abduction, stabilization of humeral head

Infraspinatus

O: Infraspinous Fossa

I: Greater tubercle of Humerus

A: External rotation, Horizontal Abduction, Extension, Humeral head stabilization

Teres Minor

O: Posterior Scapula, Axillary (Lateral) Boarder

I: Greater Tubercle (Inf. to Infraspinatus)

A: External rotation, horizontal abduction, extension, humeral head stabilization

Subscapularis

O: Subscapular Fossa

I: Leser Tubercle

A: Internal Rotation, Adduction, extension, Stabilization of humeral head

Deltoid (Anterior)

O: Anterior/Lateral third of clavicle

I: Deltoid Tuberosity

A: Flexion, Horizontal adduction, internal rotation, abduction

Deltoid (Middle)

O: Acromion Process

I: Deltoid tuberosity

A: Pure Shoulder Abduction

Deltoid (Posterior)

O: Inferior edge of Scapular Spine

I: Deltoid Tuberosity

A: Extension, Horizontal abduction, external rotation, abduction

Coracobrachialis

O: Coracoid Process

I: Humeral Shaft

A: Shoulder Flexion, Adduction, horizontal adduction,

Stabilization when arm hangs freely

Teres Major

O: Lateral Boarder of Scapula

I: (Posterior) Bicipital Groove

A: Shoulder extension, adduction, internal rotation

Pectoralis Major

O: Clavicle and Sternum

I: Bicipital Groove

A: Shoulder Flexion, Horizontal Adduction, Internal Rotation, Extension, Adduction

Latissimus Dorsi

O: Iliac Crest: Sacrum, Spinous process of T7-L5, Lower 3 ribs

I: Bicipital Groove

A: Shoulder extension, adduction, internal rotation, horizontal abduction

Biceps Brachii (Long Head)

O: Supraglenoid Tubercle

I: Radial tuberosity/Bicipital aponeurosis

A: Elbow Flexion, Forearm Supination, (Weak Shoulder Flexion)

Biceps Brachii (Short Head)

O: Coracoid Process

I: Radial Tuberosity/ Bicipital aponeurosis

A: Elbow Flexion, Forearm Supination, (Weak Shoulder Flexion)

Brachialis

O: Anterior Shaft of Humerus

I: Coronoid Process

A: Pure Elbow flexion

Brachioradialis

O: Lateral supracondylar ridge of Humerus

I: Styloid Process (Radius)

A: Elbow Flexion; Pronates from Supination; Supinates from Pronation

Triceps Brachii (Long Head)

O: Infraglenoid Tubercle

I: Olecranon process

A: Elbow Extension; Shoulder , Adduction, Horizontal Abduction

Triceps Brachii (Lateral Head)

O: Posterior Humerus (Above Radial Groove)

I: Olecranon Process

A: Elbow Extension

Triceps Brachii (Medial Head)

O: Posterior Humerus (Below Radial Groove)

I: Olecranon Process

A: Elbow Extension

Anconeus

O: Posterior Lateral epicondyle Humerus

I: Posterior Surface of Ulna Olecranon

A: Assists triceps with elbow extension

Pronator Teres

O: Medial Condyloid ridge of humerus/ Medial Proximal Ulna

I: Lateral Radius

A: Forearm Pronation; Weak Elbow Flexion

Pronator Quadratus

O: Anterior Ulna

I: Anterior Radius

A: Forearm Pronation

Supinator

O: Lateral Epicondyle/Posterior Ulna

I: Lateral Proximal Radius (Below Head)

A: Forearm Supination (Alone during extension, acts w/biceps during flexion)

Scapular Abduction (Protraction)

• Serratus Anterior

• Pectoralis Minor

Scapular Adduction (Retraction)

• Trapezius (Middle Fibers) (Assisted by Lower Fibers)

• Rhomboids (Major and Minor)

Scapular Elevation

• Trapezius (Upper fibers)

• Levator Scapulae

• Rhomboids (Major and Minor)

Scapular Depression

• Trapezius (Lower Fibers)

• Pectoralis Minor

• Assisted by Subclavius

Scapular Upward Rotation

• Serratus Anterior

• Trapezius (Middle Fibers)

• Trapezius (Lower Fibers)

Scapular Downward Rotation

• Rhomboids (Major and Minor)

• Pectoralis Minor

• Levator Scapulae (Assists)

Elbow Flexion

• Biceps Brachii

• Brachialis

• Brachioradialis

• Weak Assistance from Pronator trees

Elbow Extension

• Triceps Brachii

• Anconeus

Forearm Pronation

• Pronator Teres

• Pronator Quadratus

• Brachioradialis

Forearm Supination

• Supinator

• Biceps Brachii

• Brachioradialis

Wrist Flexion

• Flexor Carpi Radialis

• Flexor Carpi Ulnaris

• Palmar’s Longus

• Assisted by finger flexors: Flexor digitourm superficialis, digitorum profundus, pollicis longus

Wrist Extension

• Extensor Carpi Radialis Longus

• Extensor Carpi Radialis Brevis

• Extensor Carpi Ulna’s

• Assisted by finger extensors: Extensor Digitorum, Indicis, digit minima, polls longs, pollicis brevis

Radial Deviation (Wrist Abduction)

• Flexor Carpi Radialis

• Extensor Carpi Radialis brevis

• Assisted by Abductor pollicis longs, Extensor pollicis brevis

Ulnar Deviation (Wrist Adduction)

• Flexor Carpi Ulnaris

• Extensor Carpi Ulnaris