neurovasculature tracings

Question 1

trace the radial artery

Answer 1

• branch of brachialis
• deep to brachioradialis with superficial branch of radial nerve
• > recurrent branch near brachial bifurcation
  
  • goes between brachioradialis and brachialis
  • meets with radial collateral a. from profunda brachii a.
• > branches in distal forearm to make superficial palmar branch
  
  • goes through thenar eminence
• main radial a goes posteriolaterally at wrist through the anatomical snuffbox
• enters hand dorsally b/t first dorsal interosseous muscle
• <=>splits to
  
  • deep palmar arch b/t adductor pollicis and interosseous muscles toward ulnar side and goes to 3 palmar metacarpal a.
  • recurrent branch to scaphoid

Question 2

trace the ulnar artery

Answer 2

• branch of brachial artery
• > quickly branches to common interosseous
  
  • <=> splits into anterior and posterior interosseous
  • anterior interosseous travels with anterior interosseous nerve (branch of median n.)
  • posterior interosseous goes through I/O
  • they are terminal branches
  • • goes deep to the pronator teres and posterior to median nerve
• > branches to anterior ulnar recurrent a. going back medially to inferior ulnar collateral within the cubital fossa
• > branches to posterior ulnar recurrent a. slightly more distal and going back to the superior ulnar collateral a.
• distally, ulnar a. continues b/t FDP and FCU
• enters hand lateral to ulnar nerve
• through Guyon’s canal
• > branches at the pisiform, gives rise to deep palmar arch
• becomes superficial palmar arch
  
  • goes to 3 common palmar digital a. and paired proper palmar digital a

Question 3

trace the ulnar nerve

Answer 3

• from the medial cord
• goes posterior elbow joint via cubital tunnel
• enters anterior compartment of the forearm b/t heads of FCU
• > provides dorsal cutaneous branch in distal forearm - to dorsal hand
• bifurcates near or within Guyon’s canal
  
  • superficial branch -goes superficially toward digits 4-5
  • deep branch - pierces hypothenar eminence to then arch laterally rhough deep palm on the anterior surfaces of teh interossi muscles then ending in the adductor pollicis

Question 4

trace the median nerve

Answer 4

• from combo of lateral and medial cords of brachial plexus
• enters the anterior compartment of the forearm b/t the two heads of the pronator teres
• goes deep surface of FDS via the tendonous arch of the FDS
• > anterior interosseous n.
• > superficial palmar branch prior to carpal tunnel
• goes through carpal tunnel anteriorly and laterally
• > recurrent branch just distal to carpal tunnel
  
  • goes over FPB then pierces b/t FPB and APB to access OP
• <=> divides into common palmar digital nerves after exiting the carpal tunnel
  
  • each common gives rise to proper palmar digital branches
• follows deep surface of palmar aponeurosis to innervate 1 and 2 lumbricals

Question 5

trace the radial nerve

Answer 5

• from posterior cord of brachial plexus
• goes through the triceps
• goes anterior to elbow joint, deep to brachioradialis
• <=> bifurcates into superficial and deep branch
  
  • >superficial goes deep to brachioradialis with radial a. (goes laterally and posteriorly to access dorsal hand)
  • >deep branch passes b/t heads of supinator to become posterior interosseous nerve (travels with artery of same name in a fascial plane b/t superficial and deep muscles. along pollicis and indicis muscles