20) The structure that prevents hyperextension at the PIP joints of the digits is:

24) Which of the following muscles extend the PIP joint of the long (middle) finger?

12) Your patient had a radical mastectomy to remove the breast and axillary lymph nodes due tocancer. Following surgery, they are unable to protract the scapula and winging of the scapulais observed. What nerve was cut?

54) The lateral supracondylar ridge of the humerus is the origin of which muscle?

46) A patient presents with numbness on both the volar and dorsal surfaces of the fifth digit and half of the fourth. Where is the lesion?

64) For the same patient as in the preceding question, paresthesia in which location would be likely?

74) What muscle attaches to the basilar portion of the occipital bone?

38) In evaluating an athlete who injured their elbow, you detect excessive displacement of the forearm during valgus stress testing. Which of the following structures would you most suspect to be torn?

1) Which of the following ligaments give(s) stability to the acromioclavicular joint?

30) What nerve root supplies the skin overlying the thumb, volar and dorsal?