Excellent work!
I was actually looking for thenar atrophy AND ulnar deviation, but yeah, you're right. And thanks for the reminder about the ulnar nerve innervations in the hand, although I usually don't count it as a forearm flexor.
"Cubital fossa:
Starting laterally and moving medially: Radial Nerve, Biceps Tendon, Brachial Artery, and Median Nerve"
mneumonic to remember this: "Really Need Beer To Be At My Nicest"
"NEXT!
(1) What is the clinical manifestation of an upper brachial plexus injury? DAMN YOU!!!
I'm guessing you meant upper *trunk*? Upper trunk would be C5-C6, giving branches to suprascapular. Suprascapular innervates supraspinatus and infraspinatus. Supraspinatus is responsible for the first 15 degress of abduction of the arm, so the patient would be unable to abduct the arm to this angle. External rotation of the arm would also be hindered (via infraspinatus.) Upper trunk also supplies the musculocutaneous nerve, which innervates all the muscles of the upper arm (coracobrachilais, biceps brachii, brachialis.) If the musculocutaneous nerve is injured, the pt has difficulty in supination of the forearm (ala biceps bracchi,) flexion of the elbow, shoulder adduction. Upper trunk also supplies a cord to the median nerve. Severance of this nerve would result in what we mentioned earlier. Upper trunk also gives rise to the subscapular nerves, which innervate the subscapularis, the levator scapulae and rhomboids major and minor (the last two are from the dorsal part.) Movement of the glenoid fossa downwards and rotation would be hindered if the rhomboids and levator were f*cked with. Upper trunk also gives rise to the axillary nerve, which innervates the deltoid (no lateral/medial rotation of the humerus, no flexion/rotation of the humerus, no shoulder abduction), and teres minor (therefore, no external rotation.) Upper trunk also gives rise to the ulnar nerve, which if disturbed would mean: claw hand, no flexion or extension of digits 4-5, loss of sensory in digits 4-5, no adduction of the thumb (ala adductor pollicus), no flexion of the pinky (flexor caripi ulnaris.)
ARGH.
(3) How might severing the long thoracic nerve during surgery physically present post-operatively?
Long thoracic nerve comes off of C5-C7, and it innervates the serratus anterior, which is responsible for powerful protraction of the scapula (among other things.) Severance of the long thoracic would manifest itself in a syndrome called, "Winged Scapula." whereby the scapula basically sticks out from the back.
(4) Why might a person who has trouble abducting their arm 15 degrees feel pain radiating into the lateral aspect of their forearm? The muscle responsible for the first 15 degrees of arm abduction is the supraspinatus, which is innervated by the suprascapular nerve, which comes off the upper trunk of the brachial plexus (C5-C6). The upper trunk feeds into the median nerve, which innervates the flexors of the forearm (with the aforementioned exceptions.) C6 off the brachial plexus is the dermatome for sensory innervation of the lateral aspect of the forearm.
oops: mid-shaft humeral fracture:
Answer: not sure, but-- axillary, radial, ulnar nerve damage. the ulnar and axillary nerve damage clinical symptoms are above. damage to the radial nerve would mean the pt loses the abilty to extend the forearm (radial innervates the forearm extensors,) loss of elbow extension (via triceps,) loss of forearm supination (via supinator), loss of elbow flexion (via brachioradialis.)
is that right??
(5) What might shortening of the palmar aponeurosis cause? (incidentally, clinically it looks very similar to Hand of Benediction) [/B][/QUOTE] DUPUYTREN'S CONTRACTURE!
NEXT: There are a lot, but they're not nearly as hard/in-depth as yours:
1) Still waiting on the contents of the popliteal fossa?
2) Name the contents of the femoral canal, in order, moving laterally to the medial aspect.
3) The muscles that make up the pes answerina are?
4) Name two muscles that are "optional", one in the forearm, the other in the posterior leg.
5)Name the three ligaments that are commonly tornin a sprained ankle.
6) name the points of attachment for the flexor retinaculum.
7) ulnar nerve is attached to which ligament?
8) name the contents of the tarsal tunnel.
9) waddling gait is caused by trauma to which nerve?
10)to avoid sciatic nerve damage during an intramuscular injection in the right gluteal region, the needle should be inserted where?
sorry for the basic nature of teh questions-- they are all pretty much 1-5 word answer. don't have time ... must CRAM.
later.
