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MSK Post-midterm > Hand and Wrist 1 > Flashcards

Hand and Wrist 1 Flashcards

1
Q

Palmar aspect of hand

Hypothenar Eminence

A

3 Muscles

Flexor digiti minimi

Abductor digiti minimi

Opponens digiti minimi

Palmaris brevis

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2
Q

Opponens pollicis

A

Origin: flexor retinaculum
scaphoid and trapezium

Insertion: 1st metacarpal

Axns: oppose thumb
medially rotate 1st metacarpal

Blood: radial artery

Nerve: recurrent branch of median nerve

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3
Q

Abductor pollicis brevis

A

Origin: flexor retinaculum
scaphoid and trapezium

Insertion: base of proximal phalanx of thumb

Axns: abduct thumb
opposition

Blood: radial artery

Nerve: recurrent branch of median nerve

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4
Q

Flexor pollicis brevis

A

Origin: flexor retinac.
scaphoid and trapezium

Insertion: base of prox. phalanx of thumb

Axn: flex thumb

Blood: radial artery

Nerve: recurrent branch of median nerve (superficial head)
Deep branch of ulnar nerve (deep head)

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5
Q

Adductor pollicis (not in thenar eminence)

A

Origin: 2nd and 3rd metacarpal base
capitate and adjacent carpals

Insertion: base of prox. phalanx of thumb

Axns: adducts thumb toward lateral border of palm

Blood: radial artery

Nerve: deep branch of ulnar nerve

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6
Q

Abductor digiti minimi

A

Origin: pisiform

Insertion: base of prox. phalanx of 5th digit

Axns: abducts 5th digit
flexion of 5th prox. phalanx

Blood: ulnar artery

Nerve: ulnar artery

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7
Q

Flexor digiti minimi brevis

A

Origin: hook of hamate
flexor retinac

Insertion: prox. phalanx of 5th digit

Axns: flexes prox. phalanx of digit 5

Blood: ulnar artery

Nerve: deep branch of the ulnar nerve

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8
Q

Opponens digiti minimi

A

Origin: hook of hamate
flexor retinac.

Insertion: 5th metacarpal

Axns: opposition of 5th digit to thumb
(anterior pull, rotates)

Blood: ulnar artery

Nerve: deep branch of ulnar artery

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9
Q

Intrinsic (short) muscles

A

Lumbricals

Palmar interossei

Dorsal interossei

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10
Q

1st and 2nd Lumbricals

A

attached to lateral 2 tendons of FDP

Median nerve

Blood: radialis indicis artery

Superficial palmar arch (ulnar ar)

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11
Q

3rd and 4th lumbricals

A

attach to medial 3 tendons of FDP

Deep branch of ulnar nerve

Blood: superficial palmar arch (ulnar artery)
dorsal carpal arch ( ulnar and radial artery)

Insert on lateral sides of the extensor expansions of digits 2-5

Flex MCP joint

Extend IP joint

Extensor hood

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12
Q

Palmar Interossei

A

3 muscles

Origin: palmar surface of 2, 4, 5 metacarpals

Insertion: base of prox. phalanges/extensor hoods of digits 2, 4, 5

PAD: adduct 2, 4, 5 fingers toward axial line: assist lumbricals

Blood supply from radial and ulnar artery

Innervated by deep branch of ulnar nerve

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13
Q

Dorsal Interossei

A

4

Origin: adjacent sides of 2 metacarpals

Insertion: bases of prox. phalanges and exensor hood of 2-4 digits

DAB: abduct 2-4th fingers toward axial line: assist lumbricals

Blood: radial a mainly: some ulnar

Nerve: deep branch of ulnar nerve

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14
Q

Dupuytren’s Contracture

A

Progressive shortening and thickening of palmar fascia

pulls 4th and 5th digit into partial flexion

hereditary

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15
Q

Fascial compartments of Hand and Wrist

A

Hypothenar

Thenar

Central

Adductor

Interosseous

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16
Q

Long Flexor Tendons & Synovial Sheaths:

Long tendons of:

Flexor Digitorum superficialis

Flexor Digitorum Profundus

A

enter common flexor sheath (ulnar bursa) beneath flexor retinaculum

4 tendons of each enter individual synovial sheath

synovial sheath for digit 5 continuous w/ ulnar bursa

long tendon of flexor pollicis longus has a synovial sheath separate from ulnar bursa

17
Q

Tensosynovitis

A

Infections in digital synovial sheath

Inflammation of tendon and sheath

5th digit infection can spread to carpal tunnel and forearm (sheath continuous w/ ulnar bursa)

18
Q

Abduction & Adduction of fingers and thumb

A

toward the middle digit

19
Q

Palmar aspect of Hand:

Thenar Eminence

A

Abductor pollicis brevis

Flexor pollicis brevis : deep and superficial head

Opponens pollicis

Adductor pollicis: transverse and oblique head

20
Q

Power grip

A

Flexor digitorum profundus

21
Q

Movements of the thumb

A

Abduction

Adduction

Extension

Flexion

Opposition

Reposition

22
Q

Innervation of the Hand (motor)

Superficial branch of Ulnar Nerve

A

Hypothenar muscles (5th digit)

3rd and 4th lumbricals

Palmar interosseous muscles (1-4)

Dorsal interosseous muscles (1-3)

Some pollicis brevis

23
Q

Innervation (motor)

Deep branch of the Ulnar Nerve

A

Adductor pollicis (transverse and oblique head)

Deep portion of flexor pollicis brevis

24
Q

Innervation:

Recurrent Branch of Median Nerve

A

Thenar muscles (1st digit)

(except deep portion of flexor pollicis brevis)

1st and 2nd lumbrical muscles

25
Q

Innervation of the Hand (sensory distribution)

A

INSERT PIC on website

26
Q

Median Nerve

A

Deep to palmar aponeurosis

Recurrent branch: very superficial = easily injured

innervates thenar eminence AND

Palmar aspect of 1-3 digits and palm

27
Q

Carpal Tunnel Syndrom

A

Transverse carpal ligament medial to thenar eminence

pinches down on median nerve

released by cutting transverse carpal ligament

28
Q

Blood supply to forearm and hand (review)

Anterior Forearm:

A

Ulnar artery

Anterior interosseous artery

29
Q

Blood Supply: Posterior Forearm

A

Radial artery

recurrent interosseous artery

posterior interosseous artery

ulnar artery

30
Q

Superficial Palmar Arch

A

Ulnar artery

gives rise to common digital arteries

which become proper palmar digital arteries

31
Q

Deep Palmar Arch

A

Radial artery

gives rise to pinceps pollicis artery

which gives rise to radialis indics artery

32
Q

Dorsal Carpal Arch

A

Dorsal aspect of hand

Gives rise to dorsal metacarpal arteries

normally has contribution from anterior interosseous artery

33
Q

Thenar Eminence (thumb)

A

3 muscles

abductor pollicis brevis

flexor pollicis brevis (superficial and deep head)

Opponens pollicis

also adductor pollicis oblique and transverse head

34
Q

Hypothenar Eminence (under pinky)

A

3 muscles

flexor digiti minimi

abductor digiti minimi

opponens digiti minimi

palmaris brevis is superficial

MSK Post-midterm (10 decks)

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