Re: Hand: Learning Objectives and Review Questions

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: : : Hand: Learning Objectives and Review Questions : : : These questions were not submitted by the lecturer. : : : True/False - 2011 True/False - 2011 : : The hook of the hamate provides the medial distal attachment for the flexor retinaculum. : : T : Agree. : : The tubercle of the trapezium is the site of attachment of the distal lateral flexor retinaculum. : : T : Agree. : : The superficial transverse metacarpal ligament separates the passing of the interosseous muscles from the lumbricals. : : F - deep transverse metacarpal ligament? The superficial one can't - it's immediately deep to skin/tela subcutanea. : Agree. : : The pisiform bone provides the lateral proximal attachment for the flexor retinaculum. : : F - medial : Agree. : : Palmaris brevis primarily inserts into the skin and not into the palmar aponeurosis. : : T - I guess? And originates from the palmar aponeurosis since the skin is the more moveable of the attachments? : Agree. From Sarah's lecture. : : The origin of the abductor digiti minimi arises, in part, from fibers of insertion of the flexor carpi ulnaris. : : T : Agree. : : The abductor pollicis brevis may atrophy if the median nerve is perturbed in the axilla. : : T? - since it's innervated by the recurrent branch of this nerve? : Agree. : : The flexor pollicis brevis has two heads of origin, each innervated by a different nerve. : : T : Agree. : : The recurrent branch of the median nerve enters the thenar eminence by passing deep to the opponens pollicis. : : F? - turns to dive deep between abductor pollucis brevis and flexor pollucis brevis. Opponens pollicis is deep to abductor pollucis, so by the time the recurrent median gets there it's already well within the thenar eminence. : Agree. : : The oppenens pollicis muscle medially rotates the thumb at the metacarpophalangeal joint. : : T : Agree. Pronates to achieve opposition. : : The adductor pollicis is innervated by the median nerve for the transverse head and the radial nerve for the oblique head. : : F - deep branch of ulnar does both : Agree. : : Flattening of the thenar eminence occurs in the case of atrophy of the adductor pollicis. : : F - this muscle isn't included in the thenar eminence : Agree. Nevertheless, intrinsic muscle of thumb. : : The flexor digiti minimi muscle flexes the little finger at the middle interphalangeal joint. : : F - MCP joint : Agree. : : The oppenens digiti rotates the fifth metacarpal laterally and the oppenens pollicis rotates the first metacarpal medially. : : T : Agree. : : Unlike the reference digit of the foot being the second digit, the reference digit of the hand is the 3rd digit. : : T : Agree. : : The dorsal interosseous muscles are bipennate and are four in number. : : T : Agree. : : The third digit is not, by definition, capable of adduction. (This is true.) : Agree. : : Unlike the dorsal interossei, which are bipennate, the palmar interossei are unipennate. : : T : Agree. : : All seven of the interosseous muscles are innervated by the deep branch of the radial nerve. : : F - deep branch of ulnar nerve : Agree. : : All seven of the interosseous muscles resist extension at the metacarpophalangeal joints. : : T? : Agree. Explanation, in part, for claw hand. : : The tendons of flexor digitorum split into medial and lateral slips that insert onto the base of the proximal phalanges. : : F - assuming this refers to superficialis, the slips insert on the base of the middle phalanges : Agree. : : The four lumbricals resist extension at the proximal interphalangeal joint. : : F - they flex the MCP joints, extend the IP joints (both proximal and distal?) : Agree. : : The lumbrical tendons insert onto the extensor hood distal to the insertions of the interossei. : : T : Agree. : : In the case of ape hand, the thumb supinates into a position that aligns the palmar surface of the thumb with the palmar surface of the remaining fingers. : : T? : Agree. : : Within Guyan's tunnel the ulnar artery is lateral to the ulnar nerve. : : T : Agree. : : The ulnar artery is typically the dominate artery of the superficial palmar artery on the dorsum of the hand. : : T - of the superficial palmar arch. : False. Not on the dorsum. : : At the wrist the radial artery passes deep to the tendons of abductor pollicis longus and flexor pollicis longus to lie on the posterior surface of the scaphoid bone. : : T - does it also lie on the posterior surface of the trapezium? : Agree. Not in a celebrated manner; but yes, a little.

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