Arm, Elbow, & Forearm Flashcards
Cubital Fossa
Boundary
Lateral wall: medial brachiaradialis
Medial wall: lateral pronator teres
Superior edge: transepicondylar line
Floor: brachialis proximally, biceps distally
Roof: bicipital aponeurosis, fascia and skin
Cubital Fossa Contents
Radial nerve
Brachial artery
Biceps tendon
Median nerve
Brachialis
Anterior humerus and adjacent intermuscular septum – making dissection more difficult
Coronoid process and ulnar tuberosity
Musculocutaneous nerve (C5~C6), lateral by radial nerve C7, brachial artery
Elbow flexor
Brachioradialis
Lateral supracondylar ridge and intermuscular septum
Lateral radial styloid process
Radial nerve (C5~C6) and recurrent radial artery
Elbow flexion in neutral position
Bicipital Aponeurosis
From Biceps Tendon to cover forearm flexors and pronator Teres
Proctection of cupital fossa structures
Pronator Teres
Medial humeral supracondylar ridge & conronoid process of ulna Lateral mid-radius Median N (C6-C7) Ulnar & Radial A Forearm Pronation
Flexor Carpi Radialis
Medial Humeral Epicondyle Base of 2nd & 3rd metacarpals Median N (C6-C7) Ulnar A Wrist FLX & Radial Deviation
Palmaris Longus
Medial humeral epicondyle Palmar aponeurosis & flexor retinaculum Median N (C6-C7) Anterior Recurrent Ulnar A Wrist FLX, tense flexor retinaculum
Flexor Digitorum Superficialis
Medial humeral epicondyle, coronoid process, inferior radial tuberosity
Bilateral base or mid-phalanx of digits 2-5
Median N (C7-T1)
Ulnar A
Wrist FLX, digits 2-5 MCP & PIP FLX
Flexor Pollicis Longus
Anterior radius & interosseous membrane Base of distal phalanx of thumb Anterior interossesous N (C8-T1) Anterior interosseous A Thumb interphalangeal joint FLX
Flexor Digitorum Profundus
Interosseous membrane & anterior/medial ulna
Base of distal phalanges of digits 2-5
Anterior Interosseous N (digits 2-3) & Ulnar N (digits 4-5)
Ulnar & Anterior Interosseous A
Wrist FLX, Digits 2-5 DIP FLX
Pronator Quadratus
Anterior/Medial ulna and interosseous membrane Distal anterolateral radius Anterior interosseous N (C8-T1) Ulnar & Anterior Interosseous A Forearm Pronation
Flexor Carpi Ulnaris
Medial humeral epiconduyle and olecranon Pisiform, hook of hamate, and base of 5th metacarpal Ulnar N (C7-C8) Ulnar A Wrist FLX & Ulnar Deviation
Extensor Carpi Ulnaris
Lateral humeral epicondyle & dorsal ulna Base of 5th metacarpal ulnar side Posterior interosseous N (C6-C8) Ulnar A Wrist EXT & Ulnar deviation
Extensor Digit Minimi
Common tendon around lateral humeral epicondyle
Dorsal expansion on the 1st phalanx of 5th digit
Posterior interosseous N (C6-C8)
Posterior Interosseous A
Wrist EXT & ulnar deviation, 5th digit EXT