Pectoral Girdle

Question 1

what is the pectoral girdle comprised of?

Answer 1

scapula and clavicle

Question 2

what is the connection between the axial skeleton and upper limb?

Answer 2

pectoral girdle

Question 3

does the pectoral girdle have increased mobility or increased stability to the pelvic girdle

Answer 3

increased mobility, but decreased stability

Question 4

the scapula is ______ shaped

Answer 4

triangularly

Question 5

what is the scapula held in place by?

Answer 5

muscles and ligaments

Question 6

why is the clavicle commonly fractured?

Answer 6

because it is subcutaneous

Question 7

what allows the arm to swing freely from the shoulder?

Answer 7

clavicle

Question 8

the clavicle is s shaped - convex _______ medially, convex _______ laterally

Answer 8

convex anteriorly medially, convex posteriorly laterally

Question 9

what does the medial end of the clavicle articulate with?

Answer 9

clavicular notch of the manubrium

Question 10

what does the lateral, flattened end of the clavicle articulate with?

Answer 10

accordion process of the scapula

Question 11

which surface of the clavicle is smooth? which surface is roughened?

Answer 11

superior is smooth, inferior is roughened

Question 12

3 ways to identify the orientation of a scapula

Answer 12

1) posteriorly - spine of scapula
2) inferiorly - inferior angle of scapula
3) laterally - acromion process

Question 13

identifying orientation of the clavicle (3 ways)

Answer 13

1) medially - conical
2) inferiorly - rough
3) anteriorly and medially - convex

Question 14

what articulates at the scapulothoracic joint

Answer 14

the anterior scapula and the posterior rib cage

Question 15

what holds the scapulothoracic joint in place?

Answer 15

muscles

Question 16

True or false: scapular movements are NOT shoulder movements, but neither barely occur in isolation

Answer 16

true

Question 17

3 movements of the scapulothoracic joint

Answer 17

1) Elevation/Depression - raise superiorly/lower inferiorly
2) Protraction/Retraction - move away from/toward vertebral column
3) Upward/Downward Rotation - glenoid fossa moves to face superiorly/inferiorly