Exam 2

Question 1

scapula and clavicle

Answer 1

• move as a unit

- clavicle’s articulation with sternum is only bony link to axial skeleton

Question 2

shoulder girdle

Answer 2

• scapula moves on the rib cage

- joint motion occurs at sternoclavicular joint and to a lesser amount at the acromioclavicular joint

Question 3

sternoclavicular (SC) joint

Answer 3

(multiaxial) arthrodial classification
- movements= protraction, retraction, elevation, depression
- ligamentous support

Question 4

acromioclavicular (AC) joint

Answer 4

• arthrodial classification
• often injured
• ligamentous support

Question 5

scapulothoracic joint

Answer 5

• not a true synovial joint
• does not have regular synovial features
• movements=abduction, adduction, downward/upward rotation, depression/elevation
• supported dynamically by its muscles
• no ligamentous support

Question 6

abduction (protraction) of shoulder girdle/scapula

Answer 6

scapula moves laterally away from spinal column

Question 7

adduction (retraction) of scapula

Answer 7

scapula moves medially toward spinal column

Question 8

downward rotation of shoulder girdle

Answer 8

returning inferior angle toward spinal column and glenoid fossa to normal position

Question 9

upward rotation of shoulder girdle

Answer 9

turning glenoid fossa upward and moving inferior angle superolaterally away from spinal column

Question 10

depression of shoulder girdle

Answer 10

downward or inferior movement, as in returning to normal position

Question 11

elevation of shoulder girdle

Answer 11

upward or superior movement, as in shrugging your shoulders

Question 12

lateral tilt (outward tilt) of shoulder girdle

Answer 12

• during abduction
• scap rotates about its vertical axis resulting in posterior movement of medial border and anterior movement of lateral border

Question 13

anterior tilt (upward tilt) of scapula

Answer 13

• rotational movement of scap occurring during shoulder hyperextension
• superior border moves anterioinferiorly and inferior angle moves posteriosuperiorsuperiorly

Question 14

posterior tilt (downward) tilt of scapula

Answer 14

• rotational movement during shoulder hyperflexion

- superior border moves posteriorinferiorly and inferior angle moves anterosuperiorly

Question 15

shoulder girdle movements

Answer 15

elevation/depression
adduction/abduction
downward rotation/upward rotation