Anatomy Lab 2

Question 1

What innervates Pectoralis Major and Minor?

Answer 1

Lateral and Medial Pectoral Nerve

Question 2

Pectoralis Major Actions

Answer 2

Clavicular Head: Flexes humerus

Sternocostal Head: Adducts humerus

Question 3

Pectoralis Minor Actions

Answer 3

Stabilize Scapula, Raises Ribs

Question 4

What innervates Serratus Anterior (upper ribs, and medial margin of scapula)?

Answer 4

Long Thoracic Nerve of Brachial Plexus

Question 5

Serratus Anterior Actions

Answer 5

Protracts and Stabilize Scapula

Question 6

What innervates Latissimus Dorsi (Spinous process (T7-L5), and intertubercular groove of humerus)?

Answer 6

Thoracodorsal Nerve

Question 7

Latissimus Dorsi Actions

Answer 7

Adducts, extends and rotates arm

Question 8

What innervates the Trapezius(external occipital protuberance/spinal process, and nuchal ligament)?

Answer 8

Accessory and Cervical Spinal Nerves

Question 9

Trapezius Actions

Answer 9

Rotates, retracts, elevate/depress scapula

Question 10

Levator Scapula Innervation (Post tubercles of transverse process, and medial border of scapula)?

Answer 10

Cervical and Dorsal Scapular Nerve

Question 11

Levator Scapulae Actions

Answer 11

Elevates Scapula

Question 12

What innervates the Deltoid (clavicle acromion, spine, and deltoid tuberosity of humerus) and Teres Minor (lateral border of the scapula, and greater tubercle of humerus)?

Answer 12

Axillary Nerve

Question 13

Deltoid Actions

Answer 13

Flex/extends and abducts shoulder

Question 14

Infraspinatus Innervation (infraspinous fossa of scapula, and greater tubercle of humerus)

Answer 14

Suprascapular Nerve

Question 15

Infraspinatus and Teres Minor Actions

Answer 15

Lateral Rotation of arm and stabilize humerus

Question 16

Teres Major Innervation (inferior angle of the scapula, and intertubercular sulcus of the humerus)

Answer 16

Lower Subscapular Nerve

Question 17

Teres Major Actions

Answer 17

Adducts, rotates and extends the humerus,

Question 18

Subscapularis Innervation (subscapularis fossa, and less tubercle of humerus)

Answer 18

Upper and Lower Subscapular Nerve

Question 19

Subscapularis Actions

Answer 19

Internally rotates and adducts humerus, stabilize shoulder

Question 20

Supraspinatus Innervation (supraspinatus fossa of scapula, and greater tubercle of humerus)

Answer 20

Suprascapular Nerve

Question 21

Suprasinatus Actions

Answer 21

Abducts arm and stabilize humerus

Question 22

Rhomboid Major (spinous process of T2-T5 vertebrae, and medial border of scapula) and Rhomboid Minor (nuchal ligaments and spinous process, and medial border of scapula) Innervation

Answer 22

Dorsal Scapular Nerve

Question 23

Rhomboid Major and Minor Actions

Answer 23

Retracts and rotates scapula

Question 24

Biceps Brachii (SH: coracoid process and LH: supraglenoid tubercle, and radial tuberosity) and Coracobrachialis (coracoid process, and humerus) Innervation

Answer 24

Musculocutaneous Nerve

Question 25

Biceps Brachii Actions

Answer 25

Flexes elbow, flex and abducts shoulder, supinate radioulnar joint in forearm

Question 26

Coracobrachialis Actions

Answer 26

Adducts Humerus, flexes arm at glenohumeral joint

Question 27

Triceps Brachii (LH: infraglenoid tubercle LatH: above radial groove MH: below radial grove, and Olecranon process) Innervation

Answer 27

Radial and Axillary Nerve

Question 28

Triceps Actions

Answer 28

Extends forearm and shoulder, adducts arm

Question 29

Brachialis (humerus, and coronoid process and tuberosity of ulna) Innervation

Answer 29

Musculocutaneous and Radial Nerve

Question 30

Brachialis Actions

Answer 30

Elbow flexion

Question 31

Pronator Teres(HH: Medial supracondylar ridge UH: coronoid process) and Flexor Carpi Radialis ( medial epicondyle of humerus, and 2-3 metacarpal bones) and Flexor Digitorum Superficialis (medial epicondyle and radius and ulna, and middle phalanges of 4 fingers) and Flexor Digitorum Profundus (ulna, interosseous membrane, and base of distal phalanges) Pronator Quadratus (medial, anterior surface of ulna, and lateral anterior surface of the radius) Opponens Pollicis (trapezium, and metacarpal bone) Abductor Pollicis (transverse carpal ligament, and scaphoid and trapezium)

Answer 31

Median Nerve

Question 32

Pronator Teres Actions

Answer 32

Pronates forearm, flexes elbow

Question 33

Flexor Carpi Radialis Actions

Answer 33

Flex and Abducts wrist

Question 34

Flexor Carpi Ulnaris ( medial epicondyle and olecranon of ulna, and Pisiformis, hook of hamate, and base of 5th metacarpal bone) Innervation and Actions

Answer 34

Ulnar Nerve | Flex and Adducts wrist

Question 35

Flexor Digitorum Superficialis Actions

Answer 35

Flex fingers

Question 36

Pronator Quadratus Actions

Answer 36

Pronates forearm

Question 37

Flexor Digitorum Profundus Actions

Answer 37

Flex hand and interphalangeal joints

Question 38

Brachioradialis (lateral supracondylar ridge of humerus, and radial styloid process) and Extensor Carpi Radialis Longus (lateral supracondylar ridge, and 2nd metacarpal) Innervation

Answer 38

Radial Nerve

Question 39

Brachioradialis Actions

Answer 39

Flex elbow

Question 40

Extensor Carpi Radialis Longus Action

Answer 40

Extends wrist joints, abducts hand at the wrist

Question 41

Extensor Carpi Radialis Brevis (humerus, and base of 3rd metacarpal), and Extensor Carpi Ulnaris (HH: lateral epicondyle of the humerus UH: olecranon, and 5th metacarpal) and Supinator (lateral epicondyle, and lateral proximal radial shaft) Innervation

Answer 41

Deep branch of the radial nerve

Question 42

Extensor Carpi Radialis Brevis Actions

Answer 42

Extends and abducts hand at wrist

Question 43

Extensor Carpi Ulnaris Actions

Answer 43

Extends and adducts wrist

Question 44

Extensor Digitorum (lateral epicondyle, and middle and distal phalanges of 2-5 fingers) Innervation

Answer 44

Posterior Interosseous Nerve

Question 45

Extensor Digitorum Actions

Answer 45

extends hand, wrist, and fingers

Question 46

Supinator Actions

Answer 46

Supinates forearm

Question 47

Opponens Pollicis and Flexor Pollicis Brevis Actions

Answer 47

Flex thumb

Question 48

Flexor Pollicis Brevis (trapezium, and thumb) and Lumbricals (flexor digitorum profundus, and extensor expansion) Innervation

Answer 48

Median and Ulnar Nerves

Question 49

Lumbricals Actions

Answer 49

Flexes metacarpophalangeal joints, extend interphalangeal joints

Question 50

Adductor Pollicis and Abductor Digiti Minimi and Flexor Digiti Minimi and Opponens Digiti Minimi and Dorsal Interossei and Palmar Interossei Innervation

Answer 50

Ulnar Nerve

Question 51

Adductor Pollicis Actios

Answer 51

Adducts thumb

Question 52

Abductor Digiti Minimi Actions

Answer 52

Abducts pinky

Question 53

Flexor Digiti Minimi Brevis Actions

Answer 53

Flexes pinky

Question 54

Dorsal Interossei Actions

Answer 54

Abducts 2-4 fingers

Question 55

Palmar Interossei Acctions

Answer 55

Adducts 2, 4, and 5 fingers

Question 56

Sternocleidomastoid Innervation

Answer 56

Spinal Accessory Nerve

Question 57

Sternocleidomastoid Actions

Answer 57

Unilaterally: contralateral cervical rotation, ipsilateral flexion Bilaterally: cervical flexion, elevates sternum

Question 58

Anterior, Middle, and Posterior Scalene Innervation

Answer 58

Cervical Nerves

Question 59

Anterior, Middle, and Posterior Scalene Actions

Answer 59

Flex neck, and elevates 1st, 2nd ribs

Question 60

Splenius Capitis Innervation

Answer 60

Posterior ramus of Spinal Nerves

Question 61

Splenius Capitis Actions

Answer 61

Extends, and laterally flex head

Question 62

Rectus Capitis Lateralis and Rectus Capitis Anterior Actions

Answer 62

C1 and C2 Spinal Nerves

Question 63

Rectus Capitis Lateralis Actions

Answer 63

Flex, and stabilize head

Question 64

Longus Colli Innervations

Answer 64

C2-C6 Spinal Nerves

Question 65

Longus Colli Actions

Answer 65

Flexes neck and head

Question 66

Longus Capitis Innervations

Answer 66

C1-C3 Spinal Nerves

Question 67

Longus Capitis Actions

Answer 67

Flex neck