KINE 303 Muscles of the Upper Extremity

Subscapularis Origin

Subscapular Fossa

Subscapularis Insertion

Lesser tubercle of Humerus

Subscapularis Innervation

Subscapular Nerve

Subscapularis Action

Stabilization, medial rotation of humerus

Supraspinatus Origin

Supraspinous fossa

Supraspinatus Insertion

greater tubercle of humerus

Supraspinatus Innervation

suprascapular

Supraspinatus Action

stabiliazion, abduction

Infraspinatus Origin

Infraspinous fossa

Infraspinatus Insertion

greater tubercle of humerus

Infraspinatus Innervation

suprascapular

Infraspinatus Action

stabilization, lateral rotation of the humerus

Teres Minor Origin

Lateral border of scapula

Teres Minor Insertion

greater tubercle of humerus

Teres Minor Innervation

Axillary Nerve

Teres Minor Action

stabilization, lateral rotation of the humerus

Pectoralis Major Origin

Medial Clavicle, sternum, cartilage of ribs 2-6

Pectoralis Major Insertion

Lateral lip of intertubecular groove

Pectoralis Major Innervation

Medial and lateral pectoral nerve

Pectoralis Major Action

Horizontal adduction/flexion, shoulder flexion/extension, medial rotation of humerus, adduction

Biceps Brachii Origin

SH: Corocoid Process LH: Supraglenoid Tubercle

Biceps Brachii Insertion

Radial tuberosity and bicipital aponeurosis

Biceps Brachii Innervation

Musculocutaneous nerve

Biceps Brachii Action

Horizontal Adduction, LH: Abduction, SH: Adduction, Shoulder/elbow flexion, supination

Coracobrachialis Origin

Corocoid process

Coracobrachialis Insertion

Medial shaft of humerus

Coracobrachialis Innervation

Musculocutaneous nerve

Coracobrachialis Action

Horizontal adduction, flexion, adduction

Anterior Deltoid Origin

Lateral Clavicle

Anterior Deltoid Insertion

Deltoid Tuberosity

Anterior Deltoid Innervation

Axillary Nerve

Anterior Deltoid Action

Horizontal Adduction, Shoulder Flexion, Medial Rotation, Abduction (all sections)

Latissimus Dorsi Origin

Spinous processes of lower thoracic and lumber vertebrae, lumbodorsal fascia, and ribs 8-12

Latissimus Dorsi Insertion

Floor of intertubecular groove

Latissimus Dorsi Innervation

Thoracodorosal Nerve

Latissimus Dorsi Action

Extension, Adduction, Horizontal Adduction, Medial Rotation

Teres Major Origin

Inferior angle of scapula

Teres Major Insertion

Medial lip of intertubecular groove

Teres Major Innervation

Lower sub scapular nerve

Teres Major Action

Horizontal abduction, extension, adduction, medial rotation

Triceps Brachii Long Head Origin

infraglenoid tubercle of scapula

Triceps Brachii Long Head Insertion

Olecranon process of ulna

Triceps Brachii Long Head Innervation

Radial Nerve

Triceps Brachii Long Head Action

Horizontal abduction, shoulder/elbow extension, adduction

Posterior Deltoid Origin

Spine of scapula

Posterior Deltoid Insertion

Deltoid tuberosity

Posterior Deltoid Innervation

Axillary

Posterior Deltoid Action

Horizontal abduction, extension, lateral rotation, abduction (all sections)

Middle Deltoid Origin

Acromion

Middle Deltoid Insertion

Deltoid Tuberosity

Middle Deltoid Innervation

Axillary nerve

Middle Deltoid Action

Abduction

Serratus Anterior Origin

Anterior surface of ribs 1-9

Serratus Anterior Insertion

medial border of scapula

Serratus Anterior Innervation

Long thoracic

Serratus Anterior Action

Protraction, upward rotation

Subclavius Origin

medial 1st rib

Subclavius Insertion

lateral clavicle

Subclavius Innervation

Subclavian nerve

Subclavius Action

Protraction, downward rotation

Pectoralis Minor Origin

Ventral surfaces of ribs 3-5

Pectoralis Minor Insertion

Coronoid process of scapula

Pectoralis Minor Innervation

Medial Pectoral Nerve

Pectoralis Minor Action

Protraction, depression, downward rotation, anterior tilt, and forced inspiration

Trapezius Origin

Occipital bone, Spinous processes of cervical and thoracic vertebrae

Trapezius Insertion

I: clavicle, II: acromion, III: spine of scapula, IV: medial portion of spine of scapula

Trapezius Innervation

Accessory Nerve (CN XI)

Trapezius Action

Upward rotation, elevation (1+2), depression (3+4), adduction, extension of neck

Rhomboid Major Origin

Spinous processes of upper thoracic vertebrae

Rhomboid Major Insertion

Vertebral border of scapula below spine

Rhomboid Major Innervation

Dorsal Scapular

Rhomboid Major Action

Adducts and downward rotation

Rhomboid Minor Origin

Spinous Processes of C7-T1 vertebrae

Rhomboid Minor Insertion

Vertebral border of scapula near spine

Rhomboid Minor Innervation

Dorsal Scapular

Rhomboid Minor Action

Adducts and downward rotation

Levator Scapulae Origin

Transverse processes of C1-C4

Levator Scapulae Insertoin

Superior Angle of Scapula

Levator Scapulae Innervation

Cervical nerves C3-C4 and Dorsal Scapular (C5)

Levator Scapulae Action

Elevates scapula, downward rotation

Brachialis Origin

Anterior Distal surfaces of of humerus

Brachialis Insertion

Ulnar tuberosity

Brachialis Innervation

Musculocutaneous

Brachialis Action

Elbow flexion

Brachioradialis Origin

Lateral supracondylar ridge of humerus

Brachioradialis Insertion

Styloid process of radius

Brachioradialis Innervation

Radial

Brachioradialis Action

Elbow flexion, radial supination, and protonation

Triceps Brachii, Lateral Head Origin

Superior lateral surface of humerus

Triceps Brachii, Lateral Head Insertion

Olecranon process of ulna

Triceps Brachii, Lateral Head Innervation

Radial

Triceps Brachii, Lateral Head Action

Elbow extension

Triceps Brachii, Medial Head Origin

Posterior Distal Surface of Humerus

Triceps Brachii, Medial Head Insertion

Olecranon process

Triceps Brachii, Medial Head Innervation

Radial

Triceps Brachii, Medial Head Action

Elbow extension

Anconeus Origin

Lateral epicondyle of humerus

Anconeus Insertion

Lateral surface of olecranon process

Anconeus Innervation

Radial

Anconeus Action

Stabilization and elbow extension