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29 Cards in this Set
- Front
- Back
- 3rd side (hint)
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which two special grips involve the opposition of the thumb?
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power and precision
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the palmar aponeurosis originates from which 2 structures?
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flexor retinaculum and palmaris longus
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how many different sets of fibers are involved in the palmar aponeurosis? What is one of the functions of the aponeurosis?
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3; keep skin tight to palm
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Dupuytren's Contracture results from shortening and fibrosis of which structure of hand?
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palmar aponeurosis
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which three muscles comprise the thenar eminence? By which nerve are these innervated?
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abductor pollicis brevis, flexor pollicis brevis, opponens pollicis brevis; median nerve
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which three muscles comprise the hypothenar eminence? By which nerve are these innervated?
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abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi; ulnar nerve
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which thenar muscle is outside the thenar eminence? By which nerve is this innervated?
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adductor pollicis; ulnar nerve
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where do the muscles of the thenar eminence originate? Insert?
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on the flexor retinaculum and scaphoid/trapezium; abductor and flexor -- base of proximal phalanx of thumb, opponens -- body of its metacarpal
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where is the adductor pollicis located spacially compared to thenar eminence?
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medially and deep
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what are the two classes of intermediate muscles?
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interosseous muscles and lumbricals
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where do the lumbricals insert? By what are they innervated?
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lateral sides of extensor hoods; medial two by median nerve, lateral two by ulnar nerve
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how many interosseous muscles are there? By what are they innervated?
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seven; ulnar nerve
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the intrinsic muscles of the hand are responsible for what action at the MP and IP joints?
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flexion; extension
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do the dorsal interossei muscles abduct of adduct the fingers? The palmar interossei?
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abduct; adduct
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the superficial arch of the palm lies deep to which feature? The deep arch lies superficial to which feature?
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palmar aponeurosis; metacarpals
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which arch, superficial or deep palmar, is most important? Which is more distal?
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superficial; superficial
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the superficial and palmar arches branch off to form which arteries? These then branch again to form which arteries which supply blood to fingers?
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common palmar digital arteries; proper palmar digital arteries
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what is the name for the arterial branches given off by the deep palmar arch that join the common palmar digital arteries?
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palmar metacarpal arteries
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what is the name for the vascular network on the posterior aspect of the hand?
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dorsal carpal network
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None
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the radial nerve supplies sensation to which parts of the hand? What is the motor function of the radial nerve in the hand?
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lateral portion of the dorsum of hand and proximal parts of the lateral fingers; it has NONE
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when the median nerve enters the hand, it divides into what branches? These innervate which parts of the hand?
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palmar digitial branches; palmar surface of the lateral 3.5 fingers and dorsum of their terminal phalanges
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what is the name for the branch of the median nerve that innervates the thenar eminence?
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recurrent branch
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ulnar nerve branches into what upon entering the hand outside the carpal tunnel?
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superficial and deep branches
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to which area of the hand does the ulnar nerve provide sensory innervation?
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palmar aspect of the medial 1.5 fingers
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what is the name for the sheath surrounding the flexor pollicis longus? What is the name for the sheath containing the other long tendons in the hand?
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tendon sheath of the flexor pollicis longus; common flexor tendon sheath
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surrounding the digitorum tendons that are on the fingers, what will one find, from deep to superficial?
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synovial sheath, fibrous digital sheaths
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the extensor digitorum tendons form how many branches at the middle phalanx?
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3;
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the extensor hood is an expansion of which tendons?
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extensor digitorum
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what is the name for the purulent infection in the pulp of the distal phalanx? What does this lead to?
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felon; septic tenosynovitis
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