Muscles of Upper Extremity

Question 1

Functions of Subclavius muscle

Answer 1

stabilization and projection of sternoclavicular joint, depression

Question 2

Origin and Insertion of Subclavius muscle

Answer 2

O: superior aspect of first rib at its junction wit its costal cartilage
I: Inferior groove in the mid portion of the clavicle

Question 3

Shoulder girdle muscles

Answer 3

trapezius (superficial), rhomboid (deep), levatorscapula, serratus anterior, pectoralis minor (deep)

Question 4

Functions of levator scapulae

Answer 4

elevates the medial margin of the scapula

Question 5

origin and insertion of levator scapulae

Answer 5

O: transverse processes of upper four cervical vertebrae (C1-4)
I: Medial border of scapula above spine

Question 6

functions of trapezius muscle

Answer 6

upper fibers: elevation of scapula, extension of head
middle fibers: elevation, upward rotation and adduction
lower fibers: depression, adduction, and upward rotation

Question 7

origin and insertion of trapezius muscle

Answer 7

O: base of skull, occipital protuberance, posterior ligaments of neck, spinous process of cervical (C7) and all thoracic vertebrae (T1-12)
I: Posterior aspect of lateral third of clavicle, medial border of acromion process/ upper border of scapular spin, triangular base of scapular spine

Question 8

Rhomboid major and minor work….

Answer 8

together

Question 9

functions of rhomboid major and minor

Answer 9

Adduction, downward rotation, elevation

Question 10

Origin and insertion of rhomboid major and minor

Answer 10

O: Spinous process of last cervical (C-7) and first five thoracic vertebrae (T1-5)
I: Medial border of scapula below spine

Question 11

functions of serratus anterior muscle

Answer 11

abduction (protraction), upward rotation

Question 12

Origin and insertion of serratus anterior muscle

Answer 12

O: surfaces of upper nine ribs at side of chest
I: anterior aspect of whole length of medial border of scapula

Question 13

Functions of pectoralis minor

Answer 13

abduction (protraction), downward rotation, depression

Question 14

agonists of scapula abduction

Answer 14

pectoralis minor, serratus anterior

Question 15

agonists of scapula adduction

Answer 15

middle trapezius and rhomboids

Question 16

agonists of scapula elevation

Answer 16

levator scapula, upper trapezius, rhomboid

Question 17

agonists of scapula depression

Answer 17

lower trapezius, pectoralis minor