Re: Extensor Region of Forearm and Dorsum of Hand

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: : Extensor Region of Forearm and Dorsum of Hand: Learning Objectives and Review Questions : : True/False : : True/False - 2011 : : The extensor carpi radialis inserts on the base of the proximal phalanx of the second digit. : T : : Making a fist entails tightly flexing the finger joints with assistance from the extensors of the hand. : T : : The extensor carpi radialis brevis is an adductor of the wrist. : F-Abductor & Extensor : : The extensor carpi radialis longus is a more potent adductor of the wrist than is the extensor carpi radialis brevis. : T? - Better angle and bigger muscle? : : The extensor carpi ulnaris receives the only muscular branch of the ulnar nerve in the forearm. : F - (medial) half of the Flexor Digitorum Profundus, as well. : : The supinator muscle, on the space shuttle, may weakly extends the elbow. : T? - I don't think Grey's talks about zero gravity situations. : : The supinator muscle extends the elbow. : T - Weak in comparison to other extensors : : The supinator is an agonist to the biceps at the proximal radio ulnar joint and an antagonist at the elbow joint. : T : : The abductor pollicis longus muscle is innervated by the posterior interosseous nerve. : T - Regardless of ambiguity associated with Post. Interosseous vs. Deep Radial : : The extensor pollicis longus forms the anterior border of the anatomical snuff box. : F - Posterior : : The muscles having tendons bordering the anatomical snuff box are innervated by the posterior interosseous nerve. : T - All 3 muscles insert (at least in part on the IOM) : : The extensor pollicis brevis forms the anterior border of the anatomical snuff box. : T - Also the Abductor Pollicis Longus : : The abductor pollicis longus shares a compartment with the extensor pollicis brevis but is not consider a boundary of the anatomical snuff box. : F : : The extensor indices is not tethered by the intertendinous connections that limit independence of the extensor digitorum tendons. : T : : The posterior interosseous nerve enters the posterior compartment of the forearm by passing the superior free edge of the interosseous membrane. : ...It "passes" it, I guess. But does not travel from Ant->Post compartment like Post Interosseous Artery does. : : The posterior interosseous artery enters the posterior compartment of the forearm by passing the superior free edge of the interosseous membrane. : T : : The anterior interosseous artery enters the posterior compartment of the forearm by passing through the interosseous membrane at the level of the extensor retinaculum. : F - Passes from Post->Ant compartment just proximal to extensor retinaculum. : : Gray's Figures 49.16 and 49.17 would be entirely political correct as identifications on your upper limb examination. : I've never looked at Big Grey's - ??? : : The deep radial nerve is within a neurovascular bundle with the radial artery. : F - Deep Radial Nerve runs deep to Suppanator -> Posterior compartment, Radial Artery runs deep to Brachioradialis : : The interosseous recurrent artery ascents toward the posterior surface of the lateral elbow deep to the anconeus muscle. : T : : Brachioradialis flexes the elbow and extends the wrist. : F - Doesn't cross wrist joint : : Extensor carpi radialis longus inserts at the base of the second metacarpal. : T : : The abductor pollicis longus intervenes between the posterior interosseous membrane and the posterior interosseous nerve. : F? : : The anterior interosseous nerve is directly applied to the interosseous membrane. : F? Neurovascular Bundle with Ant. Interosseous Artery : : The superficial branch of the radial nerve can be palpated as it crosses the medial (posterior) boundary of the anatomical snuff box. : F - Superficial Branch of Radial Nerve ramifies into Medial/Lateral superficial branches proximal to Anatomical Snuff Box : : The tendon of flexor carpi radialis longus crosses the anatomical snuff box proximal to the crossing of the radial artery. : F - Extensor Carpi Radialis Longus? : : The dorsal carpal arch receives arterial branches from the radial artery, anterior posterior interosseous arter, posterior interosseous artery, and the dorsal branch of the ulmar artery. : T - Extraneous words? : : The dorsal metacarpal arteries lie on the posterior surface of the dorsal interosseous muscles. : T : : The extensor hood moves distally during extension. : F - Distal during Flexion : : Extensions of the lateral bands extend beyond the distal attachment of the central band. : T : : The central slip together with the lateral band is similar to a trident with a short center prong. : T? : : Despite that the interossei are posterior to the deep transverse metacarpal ligament, there are anterior to the axis of the metacarpophalangeal joint. : T

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