Palpations

Question 1

Where does the teres major originate and insert?

Answer 1

Origin: Lower, lateral border of the scapula

Insertion: Medial lip of bicipital groove

(innervated by lower subscap nerve)

Question 2

Where does the teres minor originate and insert?

Answer 2

Origin: Lateral border of scapula

Insertion: Greater tubercle of humerus

(innervated by axillary nerve)

Question 3

Where does the trapezius originate and insert?

Answer 3

UPPER
Origin: Occiput and nuchal ligament
Insertion: Posterior lateral 1/3 of scapular spine

MIDDLE
Origin: Spinous process of T1-T4
Insertion: Medial border of acromion

LOWER
Origin: Spinous process of T5-T12
insertion: Inferior middle scapular spine

(innervated by spinal accessory nerve)

Question 4

Where do the lats originate and insert?

Answer 4

Origin: Thoracolumbar fascia, iliac crest

Insertion: medial intertubercular sulcus

(innervated by thoracodorsal nerve)

Question 5

Where does the deltoid originate and insert?

Answer 5

Origin: Lateral 1/3 of cavicle (anterior), Acromion (middle), inferior/posterior scapular spine (posterior)

Insertion: Deltoid tuberosity

(innervated by axillary nerve)

Question 6

Where does the serratus anterior originate and insert?

Answer 6

Origin: Lateral ribs 1-8

Insertion: Medial border of scapula

(innervated by long thoracic nerve)

Question 7

Where does the levator scapula originate and insert?

Answer 7

Origin: Transverse processes of C1-C4

Insert: Superior angle of scap

(innervated by dorsal scapular nerve)

Question 8

Where does the rhomboid minor originate and insert?

Answer 8

Origin: Spinous processes of C7-T1

Insertion: Root of scapular spine

(innervated by dorsal scapular nerve)

Question 9

Where does the rhomboid major originate and insert?

Answer 9

Origin: Spinous processes T2-T5

Insertion: Medial border of scapula

(innervated by dorsal scapular nerve)

Question 10

Where does the subscapularis originate and insert?

Answer 10

Origin: Subscapular fossa

Insertion: Lesser tubercle of humerus

(innervated by upper and lower subscapular nerves)

Question 11

Where does the infraspinatus originate and insert?

Answer 11

Origin: Infraspinous fossa

Insertion: Greater tubercle of humerus

(innervated by suprascapular nerve)

Question 12

Where does the supraspinatus originate and insert?

Answer 12

Origin: Supraspinous process

Insertion: Greater tubercle of humerus

(innervated by suprascapular nerve)

Question 13

Where does long head of bicep originate and insert?

Answer 13

Origin: Supraglenoid tubercle

Insertion: Radial tuberosity

(innervated by musculocutaneous nerve)

Question 14

Where does short head of biceps originate and insert?

Answer 14

Origin: Coracoid process

Insertion: Radial tuberosity

(innervated by musculocutaneous nerve)

Question 15

Where does coracobrachialis originate and insert?

Answer 15

Originate: Coracoid process

Insertion: Mid humerus

(innervated by musculocutaneous nerve)

Question 16

Where does triceps long head originate and insert?

Answer 16

Origin: Infraglenoid tubercle

Insertion: Olecranon process

(innervated by radial nerve)

Question 17

Where does triceps medial head originate and insert?

Answer 17

Origin: Inferior to radial groove (lateral humerus)

Insertion: Olecranon process

(innervated by radial nerve)

Question 18

Where does triceps lateral head originate and insert?

Answer 18

Origin: Superior to radial groove

Insertion: Olecranon process

(innervated by radial nerve)

Question 19

Where does the pronator teres originate and insert?

Answer 19

Origin
- Humeral head: Medial Epicondyle
- Ulnar head: Coronoid process of ulna

Insertion: Lateral surface of the radius

Action: Pronation

(innervation: median nerve)

Question 20

Where does flexor carpi radialis originate and insert?

Answer 20

Origin: Medial Epicondyle

Insertion: Bases of 2nd and 3rd metacarpal bones

Action: Wrist flexion, radial deviation

(innervation: median nerve)

Question 21

Where does flexor carpi ulnaris originate and insert?

Answer 21

Origin: Medial epicondyle/olecranon

Insertion: Pisiform; Hook of the hamate; Base of
the 5th metacarpal

Action: Wrist flexion, ulnar deviation

(innervation: ulnar nerve)

Question 22

Where does palmaris longus originate and insert?

Answer 22

Origin: Medial epicondyle

Insertion: Palmar aponeurosis and flexor
retinaculum of the hand

Action: Wrist flexion

(innervation: median nerve)

Question 23

Where does flexor pollicis longus originate and insert?

Answer 23

Origin: Anterior and middle surfaces of the radius, interosseous membrane of the forearm

Insertion: base of the distal phalanx of the thumb

Action: Thumb flexion

(innervation: anterior interosseus nerve)

Question 24

Where does extensor carpi radialis longus originate and insert?

Answer 24

Origin: Lateral supracondylar ridge
of humerus

Insertion: Posterior surface of the base of the 2nd metacarpal

Action: Wrist extension and radial deviation

(innervation: radial nerve)

Question 25

Where does extensor carpi radialis brevis originate and insert?

Answer 25

Origin: Lateral epicondyle

Insertion: Posterior surface of the base of the 3rd metacarpal

Action: Wrist extension and radial deviation

(innervation: deep branch of the radial
nerve)

Question 26

Where does extensor digitorum originate and insert?

Answer 26

Origin: Lateral epicondyle

Insertion: Extensor hood (dorsal II‐V)

Action: Wrist extension; MP, DIP, & PIP extension

(innervation: posterior interosseous
nerve)

Question 27

Where does extensor carpi ulnaris originate and insert?

Answer 27

Origin: Lateral epicondyle

Insertion: 5th metacarpal

Action: Wrist extension and ulnar deviation

(innervation: posterior interosseous nerve)

Question 28

Where does extensor pollicis longus originate and insert?

Answer 28

Origin: Middle third of posterior surface of
ulna, interosseous membrane

Insertion: Distal phalanx

Action: Extension of thumb at CMC, MP, and
IP joints; wrist extension and radial
deviation

(innervation: posterior interosseus nerve)

Question 29

Where does extensor pollicis brevis originate and insert?

Answer 29

Origin: radius and the interosseous
membrane

Insertion: proximal phalanx

Action: extension of MP and CMC joint; wrist
extension and radial deviation

(innervation: posterior interosseus nerve)

Question 30

Where does abductor pollicis longus originate and insert?

Answer 30

Origin: Ulna (medial midpoint), radius, Interosseous membrane

Insertion: 1st Metacarpal

Action: abduction and extension of thumb at
CMC joint, wrist radial deviation

(innervation: posterior interosseus nerve)

Question 31

What are the boundaries of the anatomic snuffbox?

Answer 31

Lateral: Extensor Pollicis Brevis

Medial: Extensor Pollicis Longus

Floor: Scaphoid bone

Question 32

Which muscles of the anterior compartment are superficial? deep?

Answer 32

Superficial:
- Pronator teres
- Flexor carpi radialis
- Palmaris longus
- Flexor carpi ulnaris

Intermediate:
- Flexor digitorum superficialis

Deep:
- Flexor digitorum profundus
- Flexor pollicis longus
- Pronator quadratus

Question 33

Which muscles of the posterior compartment are superficial? deep?

Answer 33

Superficial:
- Anconeus
- brachialis
- Extensor carpi radialis longus
- Extensor carpi radialis brevis
- Extensor digitorum
- Extensor digiti minimi
- Extensor carpi ulnaris

Deep:
- Supinator
- Extensor pollicis brevis
- Abductor pollicis longus
- Extensor pollicis longus
- Extensor indicis