Re: Arm and Cubital Fossa: Learning Objectives and Review Questions - Part 1

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: : Arm and Cubital Fossa: Learning Objectives and Review Questions : True/False - 2011 : 1. The surgical neck of the humerus is distal to the anatomical neck. : T : 2. The anterior and posterior humeral circumflex arteries circle the anatomical neck of the humerus. : F - surgical neck : 3. The glenohumeral joint capsule attaches, in part, along the margin of the surgical neck of the humerus. : T - on the medial side, at most inferior aspect of capsular ligaments : 4. The spiral groove is related superiorily by the lateral head of the triceps and medially by the medial head of the triceps. : T? - if the spiral groove also called the radial groove : 5. The long head of the triceps extends at the elbow and at the glenohumeral joint. : T : 6. The teres major muscle shares a motor nerve with the subscapularis muscle. : T : 7. The teres minor muscle medially rotates at the glenohumeral joint and the teres major muscle laterally rotates at the glenohumeral joint. : F - reverse that. Teres major medially rotates, teres minor laterally rotates the humerus. (Is lateral rotation the same thing as "external rotation"?) : 8. The inferior margin of the teres major contributes the superior border of the quadrangular space. : F - to the inferior border. Teres minor contributes the superior border. : 9. The inferior margin of the teres major contributes the superior border of the triangular interval. : T : 10. The triangular interval marks the location of the spiral (radial) groove of the ulna. : F - spiral (radial?) groove of the humerus. : 11. The superior margin of the teres major muscle contributes the superior border of the triangular space. : F - teres minor is superior border, teres major is inferior border : 12. The long head of the biceps has a tendon of origin partly enveloped by a tendon sheath in the region of the bicipital groove. : T - and does the anterior circumflex humeral artery run through this sheath or inferior to it? : 13. Properly installed door knobs turn in the direction of supination when the door opens toward you. : Depends on if you're turning them with your right or left hand, and whether it's a right or left-hung door and whether it's reverse or normal swing. In any case, the knob should spin so that a mark placed on the superior aspect moves away from the jamb. : 14. The deltoid muscle acts synergistically with every movement available to the glenohumeral joint. : T : 15. The brachialis muscle inserts on the coronoid process of the radius bone. : F - coronoid process and ulnar tuberosity of the ulna : 16. The biceps muscle inserts on the radial tuberosity of the ulna. : F - radial tuberosity of the radius : 17. The lattisimus dorsi muscle contributes to the posterior margin of the intertubercular sulcus and the pectoralis minor contributes to the anterior wall of an osseofibrous canal partly formed by the intertubercular sulcus. : F - the latissimus dorsi inserts on the medial side of the sulcus and the pectoralis major (inserting on the lateral margin) partially forms the anterior surface of an osseofibrous canal incorporating the intertubercular sulcus as a posterior border : 18. The brachioradalis muscle, a flexor of the elbow, is radial nerve innervated and extends the wrist. : F? - Netter appears to have it inserting on the distal styloid of the radius. I'm thinking without crossing at least one of the metacarpals, it can't act at the wrist. It is innervated by the radial nerve. : 19. The subscapularis muscle shares an nerve supply with the teres minor. : F? - teres minor is supplied by axillary nerve, subscapularis is upper/lower subscapular nerve. It shares innervation from the same nerve roots though - C5/C6. : 20. The subscapularis muscle inserts on the lesser tubercle of the humerus. : T : 21. The musculocutaneous nerve enters the arm by passes through the coracobrachialis muscle and then resides on the anterior surface of the brachialis muscle. : T : 22. The basilic vein is a single vein whereas the brachial vein is represented by two veins. : T - brachial vein is vena commitantes : 23. The medial cutaneous vein of the forearm is deep to the brachial fascia and superficial to the antebrachial fascia. : ?? - I could not find a medial cutaneous vein of the forearm. I found a median antebrachial vein that drains into the basilic vein below the cubital fossa. It doesn't go near the brachial fascia. I also found a median cubital vein, but that one appears to be superficial to the bicipetal aponeurosis. Does the bicipetal aponeurosis constitute part of the brachial fascia? In either case, both veins are superficial to both the brachial and antebrachial fascia. : 24. The radial nerve is accompanied by the radial artery as both structures are applied to the radial groove of the humerus. : F - by the profunda brachii artery. : 25. The posterior interosseous artery passes into the posterior compartment of the arm by passing superior to the posterior free edge of the interosseous membrane and inferior to the oblique cord. : T : 26. The radial collateral artery passes through the lateral intermuscular septum of the arm. : T : 27. The superior ulnar collateral artery passes through the medial intermuscular septum of the arm. : F? - it remains anterior to it? : 28. The posterior ulnar artery passes through the heads of origin of the flexor carpi ulnaris muscle. : T? : 29. The interosseous recurrent artery has an anastomosis with the middle collateral artery. : T : 30. The radial nerve and the median nerve are contents of the cubital fossa. : T : 31. The median nerve is medial to the brachial artery within the cubital fossa. : T : 32. The radial reccurrent artery and the radial collateral artery are contents of the cubital fossa. : F? - the superior boundary of the cubital fossa is a line drawn through the epicondyles of the humerus. Netter shows the radial recurrent and the radial collateral anastemosing on the anterior/lateral surface of the capitulum right around there, so I'm guessing one is incorporated in the fossa and one is not? Or, actually, since they anastemose on the lateral surface of the capitulum, are they lateral to the cubital fossa? : 33. The anterior boundary of the cubital fossa is partly formed by the bicipital aponeurosis. : T : 34. The ulnar artery, but not the ulnar nerve, is a content of the cubital fossa. : T - ulnar nerve is too far medial : 35. The inferior ulnar collateral artery passes anterior to the medial epicondyle of the humerus and enters the cubital fossa. : T - it does pass anterior to the medial epicondyle of the humerus, but does it come far enough lateral to be included in the fossa, if the medial boundary of the fossa is pronator teres?

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