Forearm Flashcards
Flexors and pronators
Are in the anterior compartment and are served mainly by the medial nerve
Radius and ulna are joined by
An interosseous membrane
Extensors and supinators
Are all in the posterior compartment and are all innervated by the radial nerve
The tendons of most flexor muscles pass across the anterior surface of the wrist and are held in place by ____ and _____
Palmar carpal ligament and the flexor retinaculum
Superficial layer of the flexor-pronator muscles
List, and what is their common proximal attachment?
Pronator teres, flexor carpi radialis, palmaris longus, and flexor carpi ulnaris
All attached proximally by a common flexor tendon to the medial epicondyle of the humerus
Major branch of the median nerve of the forearm?
Anterior interosseous nerve
The brachial artery ends at … And divides into…
Ends at distal part of cubital fossa
Divides into ulnar and radial arteries
Ulnar artery descends through …
The anterior (flexor-pronator) compartment of the forearm
The radial artery leaves the forearm …
By winding around the lateral aspect of the wrist and crossing the floor of the anatomical snuff box to reach the hand
The anatomical snuff box boundaries
Tendons of APL and EPB laterally
Tendon of EPL medially
Anatomical snuff box floor
Radial artery
Scaphoid and trapezium can be felt in the floor, between the radial styloid process and the first metacarpal base
Medial epicondyle of humerus for…
Flexors and ulnar nerve
Radiohumeral and ulnohumeral joints are…
Are uniaxial joints
Proximal radioulnar joint. what kind and what motion does it allow?
Uniaxial pivot joint which allows pronation and supination
The joint capsule of elbow joint surrounds ____ and is weak ____
Surrounds all three articulations and is weak anteriorly and posteriorly
Radial collateral ligament
Lateral epicondyle and blends into annular ligament
Ulnar collateral ligament
Medial epicondyle to coronoid process to olecranon process 3 bands Anterior- if tight hard to extend Posterior- if tight hard to flex Oblique
Annular ligament
Encircles the head of the radius in the radial notch and serves as an articular surface
Oblique cord
Hold the radius and ulna together
Interosseous membrane
Prevents proximal displacement of radius on ulna
What are the contents of the subcutaneous tissue overlying cubital fossa?
Median cubital vein and median&lateral cutaneous nerves
Osteofacial compartments
Organize the muscles into functional groups
Shared innervation and blood supply
Formed by
-deep fascia surrounding the limb segment
-intermuscular septa projecting deep from facia to bone
-bone
-interosseous membranes where applicable
All 4 provide surface area for muscle attachment
Ulnar nerve runs…
Deep to the medial epicondyle… Superficial
