Upper Arm Flashcards
What could cause impingement or damage of radial n superior portions
Crutches
Saturday night palsy
Post dislocation of numeral jt
If radial n is injured superior to its branches what are the results
Paralysis of triceps brachii, brachioradialis, supinators, and extensors of wrist
What are the characteristic symptoms of a superiorly damaged radial n
Wrist drop- cant extend fingers @ MP joint, wrist flexes since its not opposed by the flexors
Loss of sensation to posterior arm, forearm, dorsal hand, and lateral fingers
If a person has a wrist drop disability, what would likely to have been injured
The radial nerve
What makes up the contents of the cubical fossa
Terminal brachial artery Biceps brachii tendon Median n Radial n Median cubital vein Median, lateral antebrachial cutaneous
What unites the ulna the radius
Interosseous membrane
What is the directionality of the heads of radius and the ulna
Radial head: proximal
Ulnar head: distal
What are the ligaments of the elbow
Anular l. Oblique cord Interosseous membrane Radial and ulnar collateral ligament Joint capsule
How many compartments of antebrachial fascia
2- Anterior compartment ( flexor ) Posterior compartment ( extensors )
What fascias create the carpal tunnel
Palmar carpal ligament
Flexor retinaculum
Which part of humerus do the extensor muscles attach
Lateral epicondyle and supercondylar ridge
Which part of humerus do the flexors attach to
Medial epicondyle and supracondylar ridge
Most flexors and pronators are innervated by what structures
Median n
Radial and ulnar aa
What are the exceptions to the typical innervations of the anterior compartment of the forearm
Flexor Carpi ulnaris ( ulnar n)
Flexor digitorum profundis ( 1/2 ulnar n)
What are the muscles of the superficial flexor compartment
Pronators teres m
Flexor Carpi radialis m
Palmaris longus m
Flexor Carpi ulnaris
What are the muscle of the intermediate layer of the flexor compartment
Flexor digitorum superficialis
What are the muscles of the deep layer of the flexor compartment
Flexor digitorum profundis m
Flexor pollicis longus m
Pronator quadratus m
What is one common site of impingement of the median nerve in the anterior forearm
Two heads of pronators teres
What is a common site of impingement of the ulnar n
When the ulnar n passes through the cubital tunnel
Formed by the numeral and ulnar heads of the flexor Carpi ulnaris
What muscle is the only muscle to flex the interphalangeal joint of the thumb
Flexor pollicis longus
Which muscle is the only muscle that can flex the DIP
Flexor digitorum profundus
Which muscle is the prime mover of forearm pronation
Pronators quadratus
What is the pathology of medial epicondylitis
Inflammation of the common flexor tendon
Treated with RICE
What motions are lost with an injury to the median n at the elbow/forearm
Loss of flexion to the PIP of digits 1-3
Weakened flexion of the PIP of the 4-5 digits
Loss of flexion in DIPs in the 2-3 digits
What are the characteristics of an injury to the median n at the elbow/forearm
Hand of benediction
Reduced muscle mass in the thenar mm.
True/False: impingement of AIN affects the thenar mm
False the FDP and the FPL are affected, just can’t make the “ok” hand sign
What is pronators syndrome
Nerve entrapment of the median n between the heads of pronators teres
