Lecture 11 - Antebrachium and Elbow Flashcards
What are the SUPERFICIAL muscles located in the ANTERIOR compartment of the ANTEBRACHIUM?
(from lateral to medial)
- pronator teres
- flexor carpi radialis
- palmaris longus
- flexor carpi ulnaris
What is the INTERMEDIATE muscle located in the ANTERIOR compartment of the ANTEBRACHIUM?
-flexor digitorum superficialis
What are the deep muscles located in the ANTERIOR compartment of the ANTEBRACHIUM?
Deep
- ulnar head of pronator teres
- flexor digitorum profundus
- flexor pollicus longus
- pronator quadratus
What muscles are located in the posterior compartment of the antebrachium?
Superficial:
- brachioradialis
- extensor carpi radialis longus
- extensor carpi radialis brevis
- extensor digitorum
- extensor digiti minimi
- extensor carpi ulnaris
Deep:
- supinator
- extensor indicis
- abductor pollicis longus
- extensor pollicis longus
- extensor pollicis brevis
What are the outcropping muscles?
- abductor pollicis longus
- extensor pollicis brevis
- extensor pollicis longus
All contain pollicis in the name
What is the extensor retinaculum?
- thickened portion of the antebrachial fascia
- covers the grooves on the posterior through which the extensor tendons pass
Medial to lateral, the tendons of which muscles pass through the tunnels formed by the extensor retinaculum?
- extensor (Di)gitorum and (I)ndicis
- extensor (Po)licis (L)ongus
- extensor (C)arpi (Ra)dialis (B)revis
- extensor (C)arpi (Ra)dialis (L)ongus
DIPOL
CRAB
CRAL
What does the median nerve do in the antebrachium?
What is its functional level?
What path does it take?
- supplies anterior compartment with ulnar nerve
- functional level C7
-gives off anterior interosseous nerve
- crosses cubital fossa medially to brachial artery
- passes between the heads of the pronator teres
- travels between the flexor digitorum superficialis and flexor digitorum profundus
What does the ulnar nerve do in the antebrachium?
What path does it take?
-supplies flexor carpi ulnaris and part of flexor digitorum profundus
- comes from the posterior compartment of the brachium
- through sulcus in medial epicondyle
- passes between heads of carpi flexor ulnaris
- passes between flexor carpi ulnaris and flexor digitorum profundus
What does the radial nerve do in the antebrachium?
What path does it take?
-innervates extensor carpi radialis longus and anconeus (before splitting)
- enters antebrachium between brachioradialis and brachialis
- passes in front of lateral epicondyle
- entrees cubital fossa
- innervates nerves listed above
- splits into deep and superficial branches
What does the deep branch of the radial nerve do in the antebrachium?
What path does it take?
-innervates all extensor muscles except extensor carpi radialis longus and anconeus
- wraps laterally around the neck of the radius
- runs with the posterior interosseous artery and is renamed posterior interosseous nerve
What does the superficial branch of the radial nerve do in the antebrachium?
What path does it take?
-primarily sensory
- accompanies radial artery proximally
- emerges beneath brachioradialis distally
- supplies lateral and dorsal hand in addition to the dorsal thumb and index finger
Cards over radial and ulnar artery
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What are the joints involved in the elbow complex?
Humeroulnar
Humeroradial
Radioulnar
- superior (radial notch of ulna)
- inferior (ulnar notch of radius)
- intermediate (interosseous membrane)
What ligaments are present in the elbow joint?
Medial (ulnar) collateral
-medial epicondyle to olecranon
Lateral (radial) collateral
- lateral epicondyle to olecranon
- NOT TO THE RADIUS
Annular ligament
-forms loop around neck of radius holding radial head in radial groove
