UE Muscles

Question 1

Pectoralis Major

Answer 1

O: Medial half of clavicle,
Manubrium & body of
sternum & cartilages of first
6-7 ribs

I: Crest of greater tubercle of humerus

A: Flexion, medial rotation and
horizontal adduction of shoulder.
Scapular Protraction and Depression

I: Lateral pectoral n.

Question 2

Pectoralis Minor

Answer 2

O: Ribs 2-5

I: Medial border of the coracoid process

A: Downward Rotation of scapula,
Scapular Protraction and Depression

I: Medial pectoral n.

Question 3

Serratus Anterior

Answer 3

O: Ribs 1-8

I: Medial border, costal surface of scapula

A: Upward Rotation of scapula,
Scapular Protraction and Depression

I: Long Thoracic n.

Question 4

Upper Trapezius

Answer 4

O: Superior nuchal line and
external occipital
protuberance, ligamentum
nuchae, spinous processes
and supraspinous ligaments
of C7 and all thoracic
vertebrae

I: Lateral one third of
the clavicle

A: Scapula elevation,

Upper and lower fibers-Upward
rotation of scapula

I: Cranial nerve XI (Spinal
accessory nerve) n.

Question 5

Middle Trapezius

Answer 5

O: Superior nuchal line and
external occipital
protuberance, ligamentum
nuchae, spinous processes
and supraspinous ligaments
of C7 and all thoracic
vertebrae

I: Acromion and upper lip
of the spine of the scapula

A: Scapula Retraction

I: Cranial nerve XI (Spinal
accessory nerve) n.

Question 6

Lower Trapezius

Answer 6

O: Superior nuchal line and
external occipital
protuberance, ligamentum
nuchae, spinous processes
and supraspinous ligaments
of C7 and all thoracic
vertebrae

I: Spine of the scapula

A: Scapula Depression
Upper and lower fibers-Upward
rotation of scapula

I: Cranial nerve XI (Spinal
accessory nerve) n.

Question 7

Rhomboid Major and
Minor

Answer 7

O: Ligamentous nuchae and
spinous processes of C7 to
T5

I: Medial border of scapula

A: Adduction, elevation and downward rotation of scapula

I: Dorsal Scapular n.

Question 8

Levator Scapulae

Answer 8

O: Transverse Processes of C1-4

I: Medial border of scapula between
superior angle and root of spine

A: Scapular Elevation and Downward
Rotation

I: Ventral rami of spinal
nerves (C3-C4) and the
dorsal scapular nerve

Question 9

Sternocleidomastoid

Answer 9

O: Manubrium & medial portion of Clavicle

I: Mastoid process of temporal bone

A: U/L: Same side flexion & opposed side rotation of neck

I: Spinal Accessory nerve
(CN XI)

Question 10

Latissimus Dorsi

Answer 10

O: Spinous processes of
7th through 12th
thoracic vertebrae,
through fascia from the
lumbar and sacral
vertebrae, last three or
four ribs and slip from
inferior angle of scapula

I: Intertubercular groove of
Humerus

A: Medial rotation, adduction and
extension of shoulder joint

I: Thoracodorsal n.

Question 11

Deltoid

Answer 11

O: Anterior part: lateral end of clavicle
Middle part: acromion
Posterior part: spine of the
scapula

I: Deltoid tuberosity of humerus

A: Abduction at shoulder
Anterior fibers: flex the shoulder
Posterior fibers: extend the shoulder

I: Axillary n.

Question 12

Teres Major

Answer 12

O: Inferior angle of scapula

I: Crest of lesser tubercle of Humerus

A: Shoulder medial rotation, extension,
adduction

I: Lower subscapular n.

Question 13

Coracobrachialis

Answer 13

O: Coracoid process of scapula

I: Medial aspect of middle shaft of the
humerus

A: Flexion of arm

I: Musculocutaneous n.

Question 14

Subscapularis

Answer 14

O: Subscapular fossa of scapula

I: Lesser tubercle of humerus

A: Medially rotate shoulder, adduct at shoulder

I: Upper and lower subscapular nerves

Question 15

Supraspinatus

Answer 15

O: Supraspinatus fossa of scapula

I: Upper facet of greater tubercle of
humerus

A: Shoulder Abduction up to 15 degrees

I: Suprascapular n.

Question 16

Infraspinatus

Answer 16

O: Infraspinatus fossa of scapula

I: Middle facet of greater tubercle of
humerus

A: Lateral rotation at shoulder

I: Suprascapular n.

Question 17

Teres Minor

Answer 17

O: Lateral border of scapula

I: Lower facet of greater tubercle of humerus

A: Lateral rotation at shoulder

I: Axillary

Question 18

Long head of Biceps

Answer 18

O: Supraglenoid tubercle of scapula

I: Bicipital tuberosity of the radius

A: Flexion of elbow, supination of
forearm, flexion of shoulder

I: Musculocutaneous n.

Question 19

Short head of biceps

Answer 19

O: Coracoid process of scapula

I: Bicipital tuberosity of the radius

A: Flexion of elbow, supination of
forearm, flexion of shoulder

I: Musculocutaneous n.

Question 20

Brachialis

Answer 20

O: Distal aspect of the anterior
surface of the humerus

I: Coronoid process and tuberosity on
the proximal ulna

A: Flex elbow

I: Musculocutaneous n.

Question 21

Lateral Head of
Triceps

Answer 21

O: Posterior humerus, superior
and lateral to the radial groove

I: Olecranon process of ulna

A: Extend elbow and shoulder

I: Radial n.

Question 22

Long Head of Triceps

Answer 22

O: Infraglenoid tubercle of scapula

I: Olecranon process of ulna

A: Extend elbow and shoulder

I: Radial n.

Question 23

Medial Head of Triceps

Answer 23

O: Posterior humerus, inferior
and medial to the radial groove

I: Olecranon process of ulna

A: Extend elbow and shoulder

I: Radial n.

Question 24

Brachioradialis

Answer 24

O: Upper two thirds of the
lateral supracondylar ridge of the humerus

I: Near styloid process at the distal
radius

A: Elbow Flexion especially in mid-prone position

I: Radial n.

Question 25

Anconeus

Answer 25

O: Posterior side of the lateral epicondyle of the humerus I: Between the olecranon process and proximal surface of the posterior side of the ulna A: Weak elbow extensor I: Radial n.