KINES 262 Lab Exam 3: Anterior Muscles

Name

Sternocleidomastoid

Sternocleidomastoid Actions

Neck flexion and Contralateral cervical rotation

Sternocleidomastoid Origin

Sternal end of clavicle and manubrium

Sternocleidomastoid Insertion

Mastoid Process

Sternocleidomastoid Innervation

CN XI and (C2-C3)

Name

Scalenes

Scalenes Actions

Elevates ribs, flexion and lateral flexion of the neck, contralateral rotation of head (anterior only), and ipsilateral rotation (mid and posterior)

Scalenes Origin

Transverse and costal processes of C2-C7

Scalenes Insertion

Superior surface of first 2 ribs

Scalenes Innervation

Cervical Spinal Nerves

Name

Subclavius

Subclavius Action

Stabilize the clavicle

Subclavius Origin

1st rib

Subclavius Insertion

Inferior border of clavicle

Subclavius Innervation

(C5-C6)

Name

Pectoralis Minor

Pectoralis Minor Actions

Depression, elevates ribs, protraction, and downward rotation

Pectoralis Minor Origin

Ribs 3-5

Pectoralis Minor Insertion

Coracoid Process

Pectoralis Minor Innervation

Medial Pectoral Nerve (C8,T1)

Name

Pectoralis Major

Pectoralis Major Actions

Flexion of shoulder, adduction of shoulder, and internal rotation of shoulder

Pectoralis Major Origin

Ribs 2-6, Sternum, and infero-medial clavicle

Pectoralis Major Insertion

Greater tubercle and lateral lip of bicipital groove

Pectoralis Major Innervation

Pectoral Nerve (C5-T1)

Name

Anterior Deltoid

Anterior Deltoid Actions

Abduction of shoulder and flexion of shoulder

Anterior Deltoid Origin

Clavicle and scapula

Anterior Deltoid Insertion

Deltoid Tuberosity

Anterior Deltoid Innervation

Axillary Nerve (C5-C6)

Name

Coracobrachialis

Coracobrachialis Actions

Flexion of shoulder and adduction of shoulder

Coracobrachialis Origin

Coracoid process

Coracobrachialis Insertion

Medial margin of shaft of humerus

Coracobrachialis Innervation

Musculocutaneous Nerve (C5-C7)

Name

Biceps Brachii

Biceps Brachii Actions

Flexion of elbow, supination, and flexion of shoulder

Biceps Brachii Long Head Origin

Supraglenoid tubercle

Biceps Brachii Short head Origin

Coracoid process

Biceps Brachii Insertion

Radial Tuberosity

Biceps Brachii Innervation

Musculocutaneous Nerve (C5-C6)

Name

Brachialis

Brachialis Action

Flexion of the elbow

Brachialis Origin

Anterior and distal portion of humerus

Brachialis Insertion

Ulnar tuberosity

Brachialis Innervation

Musculocutaneous nerve and radial nerve (C5-C8)

Name

Pronator Quadratus

Pronator Quadratus Action

Pronates forearm

Pronator Quadratus Origin

Antero-medial surface of distal ulna

Pronator Quadratus Insertion

Antero-lateral surface of distal radius

Pronator Quadratus Innervation

Median Nerve (C8-T1)

Name

Pronator Teres

Pronator Teres Action

Pronates forearm

Pronator Teres Origin

Medial Epicondyle of humerus & coronoid process of ulna

Pronator Teres Insertion

Middle of lateral surface of radius

Pronator Teres Innervation

Median Nerve (C6-C7)

Name

Flexor carpi radialis

Flexor carpi radialis Actions

Flexion of wrist and abduction of wrist

Flexor carpi radialis Origin

Medial epicondyle of humerus

Flexor carpi radialis Insertion

Bases of 2nd and 3rd metacarpals

Flexor carpi radialis Innervation

Median Nerve (C6-C7)

Name

Palmaris longus

Palmaris longus Action

Flexion of wrist

Palmaris longus Origin

Medial epicondyle of humerus

Palmaris longus Insertion

Palmar aponeurosis and flexor retinaculum

Palmaris longus Innervation

Median nerve (C6-C7)

Name

Flexor carpi ulnaris

Flexor carpi ulnaris Actions

Flexion of wrist and adduction of wrist

Flexor carpi ulnaris Origin

Medial epicondyle of humerus

Flexor carpi ulnaris Insertion

Pisiform bone, hamate bone, and base of the 5th metacarpal

Flexor carpi ulnaris Innervation

Ulnar Nerve (C8-T1)

Name

Flexor digitorum superficialis

Flexor digitorum superficialis Actions

Flexion of digits 2-5 and wrist flexion

Flexor digitorum superficialis Origin

Medial epicondyle of humerus

Flexor digitorum superficialis Insertion

Mid-portion of middle phalanxes of digits 2-5

Flexor digitorum superficialis Innervation

Median nerve (C7-T1)

Name

Flexor digitorum profundus

Flexor digitorum profundus Actions

Flexion of fingers and wrist flexion

Flexor digitorum profundus Origin

Postero-medial surface of ulna and interosseous membrane

Flexor digitorum profundus Insertion

Bases of distal phalanxes of digits 2-5

Flexor digitorum profundus Innervation

Anterior Interosseous nerve and Ulnar nerve (C8-T1)

Name

Flexor pollicis longus

Flexor pollicis longus Actions

Flexion of thumb, flexion of wrist, and abduction of wrist

Flexor pollicis longus Origin

Anterior shaft of radius and interosseous membrane

Flexor pollicis longus Insertion

Base of distal phalanx of thumb

Flexor pollicis longus Innervation

Median Nerve (C8-T1)

Name

Adductor Brevis

Adductor Brevis Actions

Flexion of hip and adduction of hip

Adductor Brevis Origin

Inferior ramus of pubis

Adductor Brevis Insertion

Linea aspera of femur

Adductor Brevis Innervation

Obturator nerve (L3-L4)

Name

Adductor Longus

Adductor Longus Actions

Adduction of hip and flexion of hip

Adductor Longus Origin

Inferior ramus of pubis

Adductor Longus Insertion

Linea aspera of femur

Adductor Longus Innervation

Obturator Nerve (L3-L4)

Name

Adductor Magnus

Adductor Magnus Action

Adduction of hip

Adductor Magnus Origin

Inferior ramus of pubis and ischial tuberosity

Adductor Magnus Insertion

Linea aspera of femur and adductor tubercle