muscles of the upper limb MP

Question 1

Rhomboid major

origin

Answer 1

Spinous processes of the T2 to T5 vertebrae

Question 2

Rhomboid major

Insertion

Answer 2

Medial border of the scapula

Question 3

Rhomboid major

action

Answer 3

Retracts (retract=draw bak) the scapula, rotates it to depress the glenoid cavity.
also fixes the scapula to the thoracic wall.

Question 4

Rhomboid major

INNERVATION

Answer 4

Dorsal

scapular nerve

Question 5

Rhomboid minor

Origin

Answer 5

spinous processes of C7–T1

Question 6

Rhomboid minor

insertion

Answer 6

Medial border of scapula

Question 7

Rhomboid minor

Actions

Answer 7

Retracts and rotates scapula,

fixes scapula to thoracic wall

Question 8

Rhomboid minor

INNERVATION

Answer 8

Dorsal

scapular nerve

Question 9

Levator scapulae

Origin

Answer 9

transverse processes of C1 - C4 vertebrae

Question 10

Levator scapulae

Insertion

Answer 10

Superior part of medial border of scapula

Question 11

Levator scapulae

Actions

Answer 11

Elevates scapula and tilts

its glenoid cavity inferiorly by rotating scapula

Question 12

Levator scapulae

INNERVATION

Answer 12

Dorsal scapular
and cervical
(C3 and C4)
nerves

Question 13

Serratus anterior

Origin

Answer 13

upper 8-9 ribs

Question 14

Serratus anterior

Insertion

Answer 14

medial margin of the scapula

Question 15

Serratus anterior

Actions

Answer 15

Protracts (protract= draw out/lengthen ) and stabilizes scapula
Rotates scapula upward, and
pulls it anterior
toward thoracic wall

Question 16

Serratus anterior

INNERVATION

Answer 16

long thoracic
(C05-C07)

Question 17

Pectoralis minor

Origin

Answer 17

Third to fifth ribs, near their costal cartilages

Question 18

Pectoralis minor

Insertion

Answer 18

coracoid process of the scapula

Question 19

Pectoralis minor

Actions

Answer 19

Depresses scapula

& stabilises it (by drawing it inferiorly and anteriorly against the thoracic wall

Question 20

Pectoralis minor

INNERVATION

Answer 20

Medial pectoral

nerve

Question 21

Subclavius

Origin

Answer 21

Junction of first rib and

costal cartilage

Question 22

Subclavius

Insertion

Answer 22

inferior surface of middle third of clavicle)

Question 23

Subclavius

Actions

Answer 23

depresses clavicle

Question 24

Subclavius

INNERVATION

Answer 24

Nerve to

subclavius

Question 25

Trapezius

Origin

Answer 25

1. external occipital protuberance,
2. nuchal ligament,
3. medial superior nuchal line,
4. spinous processes of vertebrae C7-T12

Question 26

Trapezius

Insertion

Answer 26

1. lateral third of the clavicle,
2. acromion process, and
3. spine of scapula

Question 27

Trapezius

Actions

Answer 27

rotation,
retraction,
elevation,
depression of scapula

Question 28

Trapezius

Innervation

Answer 28

Spinal root of accessory nerve (cranial nerve XI)

and cervical nerves (C3 and C4)

Question 29

Sternocleidomastoid (SCM)

Origin

Answer 29

Manubrium

sterni and medial portion of the clavicle

Question 30

Sternocleidomastoid (SCM)

Insertion

Answer 30

Mastoid process of the temporal bone,

superior nuchal line

Question 31

Sternocleidomastoid (SCM)

Actions

Answer 31

Tilts head to one side, i.e., 
laterally flexes and rotates head 
so face is turned superiorly toward 
opposite side; acting together, 
muscles flex neck

Question 32

Sternocleidomastoid (SCM)

Innervation

Answer 32

Spinal root of cranial nerve CN XI and C2-C3

Question 33

Omohyoid

Origin

Answer 33

Upper border of the scapula

Question 34

Omohyoid

Insertion

Answer 34

inferior border of Hyoid bone

Question 35

Omohyoid

Actions

Answer 35

depresses, move backwards, n fixes hyoid

bone

Question 36

Omohyoid

Innervation

Answer 36

C1-C3 from ansa cervicalis (a loop of nerves that are part of the cervical plexus)

Question 37

Pectoralis major

Origin

Answer 37

4 origins
1. Medial half of clavicle; 
2. sternum; 
3. superior six costal cartilages; 
4. aponeurosis of external abdominal oblique (extra
info on doc)

Question 38

Pectoralis major

Insertion

Answer 38

Intertubercular (bw tubercles) groove of humerus

Question 39

Pectoralis major

Actions

Answer 39

1. Clavicular head: flexes the humerus.
2. Sternocostal head: extends the humerus.
3. As a whole, adducts and medially rotates the humerus.
4. It also draws the scapula anteriorly and inferiorly

Question 40

Pectoralis major

Innervation

Answer 40

Lateral and medial pectoral nerves