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joints

level 3

QuestionAnswer
Q Where is the origin of the brachialis m. in relation to the deltoid tuberosity? Also, what is the insertion of this m.? A The brachialis originates just inf/ant to the deltoid tube. on the humerus, and inserts into the CORONOID process/tube of the ulna.
Q What m. is the primary flexor of the elbow at any position? A Brachialis
Q What is the innervation of the brachialis m.? A musculocutaneous (becomes the lat antebrachial cutaneous), and could have some radial as well
NOTE the brachialis forms part of the floor of the cubital fossa N431, 447 NOTE the ulnar n. is medial to the ulnar a. N448
Q What structure divides the origins of the lat/short heads of the triceps brachii? A The musculospiral groove of the humerus. The lat head originates sup, and the short is inf N432
Q T/F the 3 heads of the triceps m. insert on the olecranon process of the radius. A F, it's the olecranon process of the ULNA
Q There is a septum that divides the ant/pos compartments of the arm. What m. are found on each side of this septum? *** A He never specified, but he did say this would be on the practical. It looks like the brachialis = ant, and the short & lat heads of the triceps = pos. See N435, middle slice.
Q The radial n. passes between which heads of the triceps m.? A Between the lat/short heads of the triceps m. and into the musculospiral groove of the humerus
Q The radial n. passes between the lat/short heads of the triceps m., and into the musculospiral groove of the humerus. What other vessel accompanies it? A The deep a. of the arm. Note this is a branch off the brachial a. N434
Q What is the space called that is found between the lat/long heads of the triceps m., and the teres major? A The "triangular interval", note that this is where the radial n. and the deep brachial a. pass
Q Where is the triangular interval in relation to the quad space? What separates these two areas? A Inf., separated by the teres major
Q What are the prox/distal borders of the brachial a.? A The teres major = prox, to the cubital fossa = dist
Q As the brachial a. travels down the arm, on which side of it is the radial n. found? A The radial n. travels medially to the brachial a.
Q The brachial a. sticks to the med portion of the arm, and gives rise to what 3 branches? A First, the deep brachial a., then the sup (2nd) and inf (3rd) ulnar collateral aa. N434
Q What is the fate of the sup/inf ulnar collateral aa. that branch off the brachial a? A They become the ant (from inf) and pos (from sup) ulnar recurrent aa. and eventually anastamose w/ the ulnar a. N434
Q What is the fate of the deep brachial a. after it branches off the brachial a.? *** A It becomes the radial collateral a., then the radial recurrent, and then hence the names anastamoses w/ the radial a. ***
Q The deep veins of the arm are small and a waste of time. There are two larger superficial veins though of importance. What are they and where do they go. Remember, veins are going back to heart A The cephalic, which enters the deltopectoral triangle, and the basilic which is more medial. Both enter into the axillary vein.
Q At the distal end of the arm, there is a vein that connects the cephalic and basilic vv., what is it? *** A The median cubital v., found running over the cubital fossa ***
Q Trace the lat antebrachial cutaneous n. back to the brachial plexus. It's not as hard as it sounds A let antebrachial cutaneous n. into the musculocutaneous n. (through coracobrach m.) and then into the lat cord N474
Q The notes say that the radial n. gives off the pos. antebrachial cutaneous n. at the level of the lat epicondyle of the humerus. N 477 looks a lot higher. The name is self explanatory. What is the function of this n.? A sensory to pos forearm
Q What are the terminal branches of the radial n.? Where do these branch off? A The sup terminal branch and the deep terminal branch split off the radial n. after it passes through the lat intermuscular septum. superficial is sensory, and deep is motor
Q This n. in the arm is formed by contributions from both lat/med cords and doesn't do much above the elbow. A Median n.
Q What n. innervates the flexors of the forearm, AND pierces the pronator teres m.? A median n. Remember the difference between pronator teres syndrome and carpal tunnel syndrome N 475
Q Of the three major nn. of the arm/forearm, which passes pos to the elbow on it's way down? A The ulnar, it passes pos to the med epicondyle of the humerus N476
Q What m. does the ulnar n. travel below on it's way to the hand? A The flexor carpi ulnaris m. N476
Q The ulnar a. branches off the brachial. a. What n. does this BV travel with in the forearm, and how/where does it enter the hand? A The ulnar a. travels with the ulnar n. in the forearm, and these enter the hand through a separate (from the carpal tunnel) tunnel made by the hamate/pisiform N448, 476
Q What are the lat/med borders of the cubital fossa? A brachioradialis = lat, and pronator teres = med.
Q What part of the cubital fossa does the bicipital aponeurosis of the biceps brachii m. form? A roof
Q What mm. form the floor of the cubital fossa? A insertion of brachialis m. and supinator
Q Superficial to the cubital fossa is a vein. What is it? *** A median cubital v. ***
Q Make sure and find the separation of the radial/ulnar aa. in the arm. Remember that the ulnar a. gives off ant/pos recurrent aa., and the radial branches off the radial recurrent a., all of which travel back up to the brachial a.
Q Aside from the recurrent aa. that branch off the ulnar a., what is an important branch to remember? *** A The common interosseous a.***
Q The common interosseous a. branches off the ulnar a., and then splits. Where do it's branches travel?*** A The ant/pos interosseous aa. travel on both sides of the interosseous membrane in the forearm.***
NOTE there will be 1 question on the anatomy of the ulna on the practical pg 14 in notes NOTE there will also be 1 question on the radius, also pg 14 in notes
Q What type of joint is the elbow? A hinge, diarthrotic, synovial
Q What shape are the rad/lat and ulnar/med collateral lig's of the elbow in? A Well, the notes say the radial is V shaped and the ulnar is a triangle. That equates to the same thing to me. Check out the attachments on pg 15 of the notes. N 438
Q What two bursae are associated with the olecranon? A The subcutaneous olecranon bursa between the skin and olecranon, and the subtendinous olecranon bursa between the olecranon and the tendon of the triceps m. N438
Q What are the 3 origins of the supinator m.? *** A The lat epicondyle of humerus, annular lig of the radius, and supinator fossa of the ulna N 440
Q What m. separates the radial n. into deep/sup branches? A supinator m.
Q This m. has two heads. One originates from the medial epicondyle of the humerus, and the other from the med aspect of the coronoid process of the ulna A The pronator teres m.
Q What n. passes through the two heads of the pronator teres m.? A median n.
Q What m. holds the distal ends of the radius and ulna together? A the pronator quadratus m.
Q The mm. of the ant compartment of the forearm/superficial group all attach to what structure? A Med epicondyle of the humerus
Q The flexor carpi radialis m. inserts into the base of which metacarpal? A 2 N450
Q This flexor of the forearm has a small m. mass and a long tendon. It does not insert into a bone in the hand, but passes over the flexor retinaculum, and into the palmar aponeurosis. A palmaris longus N446
Q The palmaris longus is useful for locating which n. at it's distal aspect? A The median n., where it splits at the retinaculum
Q This m. forms most of the med forearm, and innervated by the ulnar n. Note, it is useful to find the ulnar a./n. A flexor carpi ulnaris m. N446
TA-DAAAA!!! FINALLY DONE! Well, I am at least.
This joint allows movement and there are 5 types Synovial
Created by: GrossAnatomy2