Skills Check WI 2 Neck, shoulder, forearm/hand

Question 1

Trapezius

Answer 1

O: Medial third of superior nuchal line; external occipital protuberance; nuchal ligament; spinous process of C7-T12 vertebrae

I: Lateral third of clavicle; acromion and spine of scapula

N: Spinal accessory nerve; (C3-C4 spinal nerve)

A: Upper -> elevates; Lower -> depresses; Middle -> retracts scapula

Question 2

Levator Scapula

Answer 2

O: Posterior tubercles of transverse processes of C1-C4 (or C2-C6)

I: superior angle of the scapula

N: dorsal scapular nerve (C4-C5)

A: elevates scapula

Question 3

Rectus capitis posterior major

Answer 3

O: spinous process of vertebra C2

I: lateral part of inferior nuchal line of occipital bone

N: suboccipital nerve

A: ipsilateral head rotation; bilateral head extension

Question 4

Rectus capitis posterior minor

Answer 4

O: posterior tubercle C1

I: inferior nuchal line

N: suboccipital nerve

A: ipsilateral head rotation; bilateral head extension

Question 5

obliquus capitis superior

Answer 5

O: transverse process of C1

I: occipital bone between superior and inferior nuchal lines

N: suboccipital nerve

A: lateral head flexion; bilateral extension

Question 6

Obliquus capitis inferior

Answer 6

O: posterior tubercle of posterior arch of C2

I: transverse process of C1

N: Suboccipital nerve

A: ipsilateral head rotation

Question 7

Sternocleidomastoid

Answer 7

O: Manubrium & clavicle

I: Mastoid process

N: CN XI

A: Contralateral head rotation; bilateral head extension; bilateral neck extension & flexion

Question 8

Anterior scalene

Answer 8

O: Transverse process of C3-C6

I: 1st rib

N: cervical spinal nerve

A: neck flexion; rib elevation

Question 9

Middle Scalene

Answer 9

O: Transverse process of C2-C7

I: 1st rib

N: cervical spinal nerves

A: lateral next flexion; rib elevation

Question 10

Posterior Scalene

Answer 10

O: transverse process of C5-C7

I: 2nd rib

N: cervical spinal nerves

A: lateral neck flexion; rib elevation

Question 11

Biceps Brachii Long head

Answer 11

O: supraglenoid tubercle

I: radial tuberosity

N: Musculocutaneous nerve

A: supination & elbow flexion

Question 12

Biceps Brachii Short head

Answer 12

O: coracoid process

I: radial tuberosity

N: musculocutaneous nerve

A: supination & elbow flexion

Question 13

Anterior deltoid

Answer 13

O: lateral clavicle

I: deltoid tuberosity

N: axillary nerve

A: flex & medial rotation of arm

Question 14

Middle deltoid

Answer 14

O: acromion process

I: deltoid tuberosity

N: axillary nerve

A: abducts the arm

Question 15

Posterior deltoid

Answer 15

O: scapular spine

I: deltoid tuberosity

N: axillary nerve

A: extends & laterally rotates arm

Question 16

Latissimus Dorsi

Answer 16

O: spinous process T7-T12; thoracolumbar fascia & iliac crest

I: intertubercular groove

N: thoracodorsal nerve

A: extends, adducts, medial rotates arm

Question 17

Teres minor

Answer 17

O: lateral board of scapula

I: inferior facet of greater tubercle of humerus

N: axillary nerve

A: lateral rotation of arm

Question 18

Subscapularis

Answer 18

O: subscapular fossa

I: lesser tubercle of humerus

N: upper & lower subscapular nerve

A: medially rotates arm

Question 19

Pectoralis major

Answer 19

O: clavicle, sternum, costal cartilage, external oblique aponeurosis

I: intertubercular groove

N: lateral & medial pectoral nerve

A: adduction & medial rotation of arm

Question 20

pectoralis minor

Answer 20

O: ribs 3-5

I: coracoid process

N: medial pectoral nerve

A: scapular stabilization & rib elevation

Question 21

Brachioradialis

Answer 21

O: lateral supracondylar ridge of humerus

I: distal radial shaft

N: radial nerve

A: flexion of forearm

Question 22

Triceps lateral (short) head

Answer 22

O: proximal humeral shaft, superior to radial groove

I: olecranon process

N: radial nerve

A: extension of forearm

Question 23

Triceps long head

Answer 23

O: infraglenoid tubercle

I: olecranon process

N: radial nerve

A: extension of forearm

Question 24

Triceps medial head

Answer 24

O: posterior humeral shaft, inferior to radial groove

I: olecranon process

N: radial nerve

A: extension of forearm

Question 25

Extensor carpi radialis longus (ECRL)

Answer 25

O: lateral supra-epicondylar ridge I: dorsal aspect of 2nd metacarpal N: radial nerve A: extend & abduct hand at wrist

Question 26

Extensor carpi radialis brevis (ECRB)

Answer 26

O: lateral epicondyle I: 3rd metacarpal N: deep branch of radial nerve A: extension & abduction of hand at wrist

Question 27

Extensor carpi ulnaris

Answer 27

O: lateral epicondyle I: 5th metacarpal N: deep branch of radial nerve A: extension & adduction hand at wrist

Question 28

Extensor digitorum

Answer 28

O: lateral epicondyle I: extensor expansions 2-5 N: deep branch of radial nerve A: extends digits 2-5

Question 29

Pronator teres

Answer 29

O: medial epicondyle I: lateral surface of radial shaft N: median nerve A: pronation & flexion of forearm

Question 30

Flexor carpi radialis

Answer 30

O: medial epicondyle I: 2nd metacarpal N: median nerve A: Flexion & abduction hand at wrist

Question 31

Palmaris longus

Answer 31

O: medial epicondyle I: palmar aponeurosis N: median nerve A: flexion of hand at wrist; tenses palmar aponeurosis

Question 32

Flexor carpi ulnaris

Answer 32

O: medial epicondyle I: pisiform, hook of hamate, 5th metacarpal N: ulnar nerve A: flexion & adduction of hand at wrist

Question 33

Teres major

Answer 33

O: inferior angle of scapula (posterior surface) I: intertubercular groove (medial lip) N: lower subscapular nerve A: adducts and medially rotates arm

Question 34

Supraspinatus

Answer 34

O: supraspinous fossa of scapula I: superior facet of greater tubercle of humerus N: suprascapular nerve A: initiates & assists in abduction

Question 35

infraspinatus

Answer 35

O: infraspinous fossa of scapula I: middle facet of greater tubercle of humerus N: suprascapular nerve A: laterally rotates arm