Pectoral Girdle

Question 1

what is the function of the pectoral girdle

Answer 1

attach the upper limb to the trunk and also to stabilise the shoulder and provide movement

Question 2

what 2 bones make up the pectoral girdle

Answer 2

scapula, clavicle

Question 3

name some muscles that make up the pectoral girdle

Answer 3

Trapezius, subclavius, pectoralis Major and Minor, serratus anterior, deltoid, levator Scapulae, Rhomboid minor, rhomboid major, subscapularis

Question 4

name the actions, origin, and insertion of the Descending Limb of the Trapezius

Answer 4

Origin: external occipital protuberance
Insertion: posterior 1/3 of clavicle
Function: elevation, retraction, upwards rotation

Question 5

name the actions, origin, and insertion of the Ascending Limb of the Trapezius

Answer 5

Origin: T5-12
Insertion: medial end of spine of scapula
Function: depression, retraction, upward rotation

Question 6

name the actions, origin, and insertion of the Transverse Limb of the Trapezius

Answer 6

Origin: C7-T4
Insertion: acromion of scapula
Function: retraction

Question 7

name the actions, origin, and insertion of the Levator Scapulae

Answer 7

Origin: C1-C4
Insertion: superior angle of scapula
Function: elevation and downward rotation

Question 8

name the actions, origin, and insertion of the Rhomboid Major

Answer 8

Origin: spinous processes T2-T5
Insertion: medial border of scapula
Function: retracts and downward rotation

Question 9

name the actions, origin, and insertion of the Rhomboid Minor

Answer 9

Origin: Nuchal ligament
Insertion: medial border of scapula
Function: retraction and downward rotation

Question 10

name the actions, origin, and insertion of the Subclavius Muscle

Answer 10

Origin: costal end of of first rib
Insertion: middle 1/3 clavicle
Function: stabilises clavicle

Question 11

name the actions, origin, and insertion of the Pectoralis Major

Answer 11

Origin: clavicular head,
Insertion: crest of greater tubercle of humerus
Function: adducts, medially rotates, transversely adducts, flexes shoulder

Question 12

name the actions, origin, and insertion of the Pectoralis Minor

Answer 12

Origin: anterior ends, 3rd to 5th ribs
Insertion: coracoid process of scapula
Function: protraction and downward rotation

Question 13

name the actions, origin, and insertion of the Serratus Anterior

Answer 13

Origin: 1st to 9th ribs
Insertion: medial border of scapula
Function:protraction and upward rotation