UE Muscles

Question 1

Pectoralis Major Origin & Insertion

Answer 1

Origin:
Medial half clavicle
Manubrium
Sternum body
1-7 rib cartilage

Insertion:
Humerus greater tubercle

Question 2

Pectoralis Major Function & Innervation

Answer 2

Function:
Shoulder flexion
Shoulder medial/internal rotation
Shoulder adduction
Scapular protraction
Scapular depression

Innervation:
Lateral pectoral n.

Question 3

Pectoralis Minor Origin & Insertion

Answer 3

Origin:
Ribs 2-5

Insertion:
Coracoid process medial border

Question 4

Pectoralis Minor Function & Innervation

Answer 4

Function:
Scapular downward rotation
Scapular protraction
Scapular depression

Innervation:
Medial pectoral n.

Question 5

Serratus Anterior Origin & Insertion

Answer 5

Origin:
Ribs 1-8

Insertion:
Scapula costal surface medial border

Question 6

Serratus Anterior Function & Innervation

Answer 6

Function:
Scapular upward rotation
Scapular protraction
Scapular depression

Innervation:
Long Thoracic n.

Question 7

Trapezius Origin & Insertion

Answer 7

Origin:
External occipital protuberance
Superior nuchal line
Ligamentum nuchae
Spinous processes
Supraspinous liggs C7-T12

Insertion:
Upper- Clavicle lateral 1/3
Middle- Acromion and Scapula upper lip
Lower- Scapula Spine

Question 8

Trapezius Function & Innervation

Answer 8

Function:
Upper- Scapular elevation; Scapular upward rotation
Middle- Scapular retraction
Lower- Scapular depression; Scapular upward rotation

Innervation:
Cranial n XI (Accessory n.)

Question 9

Rhomboid Major & Minor Origin & Insertion

Answer 9

Origin:
Ligamentous nuchae
Spinous processes C7-T5

Insertion:
Scapula medial border

Question 10

Rhomboid Major & Minor Function & Innervation

Answer 10

Function:
Shoulder adduction
Scapular elevation
Scapular downward rotation

Innervation:
Dorsal scapular n.

Question 11

Levator Scapulae Origin & Insertion

Answer 11

Origin:
Transverse process C1-C4

Insertion:
Scapula medial border between superior angle and root of spine

Question 12

Levator Scapulae Function & Innervation

Answer 12

Function:
Scapular elevation
Scapular downward rotation

Innervation:
Ventral rami of spinal nerves C3-C4
Dorsal scapular n.

Question 13

Sternocleidomastoid Origin & Insertion

Answer 13

Origin:
Manubrium
Clavicle medial portion

Insertion:
Mastoid process (temporal bone)

Question 14

Sternocleidomastoid Function & Innervation

Answer 14

Function:
Same side flexion
Ipsilateral side rotation

Innervation:
Cranial n XI (Accessory n.)

Question 15

Latissimus Dorsi Origin & Insertion

Answer 15

Origin:
Spinous processes of T7-T12
Lumbar and sacral fascia
Inferior angle of scapula

Insertion:
Humerus intertubercular groove

Question 16

Latissimus Dorsi Function & Innervation

Answer 16

Function:
Shoulder medial/internal rotation
Shoulder adduction
Shoulder extension

Innervation:
Thoracodorsal n.

Question 17

Deltoid Origin & Insertion

Answer 17

Origin:
Anterior- Clavicle lateral end
Middle- Acromion
Posterior- Scapula spine

Insertion:
Humerus deltoid tuberosity

Question 18

Deltoid Function & Innervation

Answer 18

Function:
Shoulder abduction
Anterior- Shoulder flexion
Posterior- Shoulder extension

Innervation:
Axillary n.

Question 19

Teres Major Origin & Insertion

Answer 19

Origin:
Scapula inferior angle

Insertion:
Humerus lesser tubercle crest

Question 20

Teres Major Function & Innervation

Answer 20

Function:
Shoulder medial/internal rotation
Shoulder extension
Shoulder adduction

Innvervation:
Lower subscapular n.

Question 21

Coracobrachialis Origin & Insertion

Answer 21

Origin:
Scapula coracoid process

Insertion:
Humerus medial aspect of middle shaft

Question 22

Coracobrachialis Function & Innervation

Answer 22

Function:
Elbow flexion

Innervation:
Musculocutaneous n.

Question 23

Subscapularis Origin & Insertion

Answer 23

Origin:
Scapula subscapular fossa

Insertion:
Humerus lesser tubercle

Question 24

Subscapularis Function & Innervation

Answer 24

Function:
Shoulder medial/internal rotation
Shoulder adduction

Innervation:
Upper subscapular n.
Lower subscapular n.

Question 25

Supraspinatus Origin & Insertion

Answer 25

Origin: Scapula supraspinatus fossa Insertion: Humerus upper facet of greater tubercle

Question 26

Supraspinatus Function & Innervation

Answer 26

Function: Shoulder abduction (0-15 degrees) Innervation: Suprascapular n.

Question 27

Infraspinatus Origin & Insertion

Answer 27

Origin: Scapula infraspinatus fossa Insertion: Humerus middle facet of greater tubercle

Question 28

Infraspinatus Function & Innervation

Answer 28

Function: Shoulder lateral/internal rotation Innervation: Suprascapular n.

Question 29

Teres Minor Origin & Insertion

Answer 29

Origin: Scapula lateral border Insertion: Humerus lower facet of greater tubercle

Question 30

Teres Minor Function & Innervation

Answer 30

Function: Shoulder lateral/external rotation Innervation: Axillary n.

Question 31

Long Head Biceps Origin & Insertion

Answer 31

Origin: Scapula supraglenoid tubercle Insertion: Radius bicipital tuberosity

Question 32

Long Head Biceps Function & Innervation

Answer 32

Function: Elbow extension Shoulder extension Innervation: Musculocutaneous n.

Question 33

Short Head Biceps Origin & Insertion

Answer 33

Origin: Scapula coracoid process Insertion: Radius bicipital tuberosity

Question 34

Short Head Biceps Function & Innervation

Answer 34

Function: Elbow flexion Supination Shoulder flexion Innervation: Musculocutaneous n.

Question 35

Brachialis Origin & Insertion

Answer 35

Origin: Humerus distal aspect of anterior surface Insertion: Proximal ulna coronoid process and tuberosity

Question 36

Brachialis Function & Innervation

Answer 36

Function: Elbow flexion Innervation: Musculocutaneous n.

Question 37

Lateral Head Triceps Origin & Insertion

Answer 37

Origin: Posterior humerus Superior and lateral to radial groove Insertion: Ulna olecranon process

Question 38

Long Head Triceps Origin & Insertion

Answer 38

Origin: Scapula infraglenoid tubercle Insertion: Ulna olecranon process

Question 38

Lateral Head Triceps Function & Innervation

Answer 38

Function: Elbow extension Shoulder extension Innervation: Radial n.

Question 39

Long Head Triceps Function & Innervation

Answer 39

Function: Elbow extension Shoulder extension Innervation: Radial n.

Question 40

Medial Head Triceps Origin & Insertion

Answer 40

Origin: Posterior humerus Inferior and medial to radial groove Insertion: Ulna olecranon process

Question 41

Medial Head Triceps Function & Innervation

Answer 41

Function: Elbow extension Shoulder extension Innervation: Radial n.

Question 42

Brachioradialis Origin & Insertion

Answer 42

Origin: Humerus upper 2/3 lateral supracondylar ridge Insertion: Distal radius near styloid process

Question 43

Brachioradialis Function & Innervation

Answer 43

Function: Elbow flexion (especially mid-prone position) Innervation: Radial n.

Question 44

Anconeus Origin & Insertion

Answer 44

Origin: Humerus posterior side of lateral epicondyle Insertion: Between olecranon process and proximal surface of posterior ulna

Question 45

Anconeus Origin & Insertion

Answer 45

Origin: Elbow extension (weak) Innervation: Radial n.