Elbow RMSK Flashcards
Prominent recess/FOSA of elbow
coronoid and radial fossa anteriorly and olecranon fossa posteriorly
Where are the fat pads located
in each joint recess. it is intracapsular but extrasynovial
Medial elbow joint stabilizers
UCL- 3 components anterior , posterior and oblique
Which is the most important medial stabilizer
anterior bundle
Lateral elbow stabilizer
LCL complex
what are the components of the lateral elbow stabilizer
radial collateral ligament, annular ligament, small accessory radial collateral ligament and LUCL
Brachialis inserts to
Ulna BRU!!!
Biceps brachii inserts where?
radial tuberosity
what kind of insertion is biceps brachii
dual insertion… short head is more superficial and inserts distally on radial tuberosity
triceps inserts to
olecranon process
which muscles compose the superficial layers of the distal triceps?
lateral and long head
shorter head of triceps and deeper
medial head
Where can you find the anconeus
between olecranon process and lat epicondyle
Medial compartment of elbow
common flexor tendon ( FCR, PL, FCU, FDS) all originating from medial epicondyle
Lateral compartment of elbow structures?
ECRB, ED, EDM, ECU all from lateral epicondycle
Not including ECRL- since it is more proximal
Where is origin of ECRL
proximal to lateral epicondyle
Space between olecranon process of ulna and Medial epicondyle is bridged by what ligament
bridged by the cubital tunnel retinaculum ( osborne ligament)
True cubital tunnel
between two heads of flexor carpi ulnaris and deep to arcuate ligament
WHere does median nerve course through sa elbow
between ulnar and radial headfs of pronator teres
Radial nerve course from humerus .. which muscles does it pass
posterior aspect of humeral shaft then distally and laterally beneath the brachioradialis.. deep branch courses under supinator and superficial branch beneath BR into forearm
Commonly missed in elbow scan
anterior joint recess. ulnar collateral ligament, LCL complex, radial head and annula recess, capitellum, posterior joint recess, olecranon bursa
vascular Landmark of biceps brachii tendon
lateral to brachial artery
Two different superficial nerves of anterior elbow and landmarks
lateral antebrachial cutaneous nerve- lateral and superficial ..( continuation of musculocutaneous nerve) to BT, radial nerve- superficiial and deep
Lacertus fibrosus location
superficial to biceps tendon
Views for distsal biceps tendon
usual anterior aproach.. lateral to brachial artery
Other views for distal biceps tendon
Medial approach v1 ( move medial until brachial artery seen then angle lateral toward center of elbow. + heel toe maneuver + slight flexion )
Another medial approach v2
SAX then LAX once footprint is seen
3rd method for distal biceps
Pronator window approach- elbow flexed… transducer over medial epicondcle and elbow flexed… viewing at coronal plane , move towards wrist and slightly anterior to visualize radial tuberosity
structures to evaluate on posterior elbow
joint recess, triceps, soft tissues over olecranon, trochlea, capitellum, olecranon fossa, cartilage
superficial layer of triceps brachii posteriorly comprised of which heads
long and lateral heads
deeper layer of triceps represent
medial head of triceps
lateral structures ( tendon, ligament, bony landmarks)
common extensor tendon, LCL complex, raidal head, annula recess, capitellum, radial collateral ligament