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human anatomy > m6: moina > Flashcards

m6: moina Flashcards

1
Q

Wrist Extensor

MUSCLE:

ORIGIN: Lateral SUPRACONDYLAR RIDGE of humerus

INSERTION: Posterior surface of base of SECOND metacarpal bone

NERVE: Radial nerve (1)

ACTIONS: Extends and abducts hand at wrist joint (1)

A

Extensor Carpi Radialis Longus

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2
Q

Wrist Extensor

MUSCLE:

ORIGIN: Lateral EPICONDYLE of the humerus (via the common extensor tendon) (1)

INSERTION: Posterior surface of base of THIRD metacarpal bone

NERVE: Radial nerve (2)

ACTIONS: Extends and abducts hand at wrist joint (2)

A

Extensor Carpi Radialis Brevis

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3
Q

Wrist Extensor

MUSCLE:

ORIGIN: Lateral EPICONDYLE of the humerus (2)

INSERTION: Base of the FIFTH metacarpal

NERVE: Radial nerve (3)

ACTIONS: Extends and ULNAR DEVIATES the hand at the wrist joint

A

Extensor Carpi Ulnaris

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4
Q

Wrist Flexors

MUSCLE: FCR, PL, FCU

ORIGIN:

A

Medial epicondyle of humerus

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5
Q

Wrist flexor

MUSCLE:

INSERTION: Attaches to the RADIAL side of the anterior hand at the bases of the SECOND and THIRD metacarpals.

NERVE: Median nerve (1)

A

Flexor carpi radialis

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6
Q

Wrist flexor

MUSCLE:

INSERTION: Attaches into the PALMAR APONEUROSIS aponeurosis of the palm of the hand.

NERVE: Median nerve (2)

A

Palmaris longus

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7
Q

MUSCLE:

INSERTION: Attaches to the ULNAR side of the anterior hand at the base of the FIFTH metacarpal, the pisiform, and the hook of the hamate.

NERVE: Ulnar

A

Flexor carpi ulnaris

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8
Q

Wrist flexor

MUSCLE: FCR, PL, FCU

ACTION:

A

Flex the hand at the wrist joint

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9
Q

Wrist flexor

MUSCLE:

ORIGIN:
• HUMEROULNAR HEAD: medial epicondyle of the humerus (via the common flexor belly/tendon) and the coronoid process of the ulna
• RADIAL HEAD: Oblique line on anterior surface of shaft of radius

INSERTION: MIDDLE phalanx of medial four fingers

NERVE: Median nerve (3)

ACTIONS: Flexes middle phalanx of fingers and assists in flexing proximal phalanx and
hand

A

Flexor Digitorum Superficialis

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10
Q

Wrist flexor

MUSCLE:

ORIGIN: Anteromedial surface of shaft of ulna

INSERTION: DISTAL phalanges of medial four fingers

NERVE: Median nerve (lateral half) and ulnar nerve (medial half)

ACTIONS: Flexes distal phalanx of FINGERS

A

Flexor Digitorum Profundus

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11
Q

Wrist flexor

MUSCLE:

ORIGIN: Anterior surface of shaft of radius

INSERTION: DISTAL phalanx of the THUMB

NERVE: Anterior interosseous branch of the median nerve

ACTIONS: Flexes distal phalanx of THUMB

A

Flexor Pollicis Longus

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12
Q

Wrist flexor

MUSCLE:

ORIGIN: Posterior surface of shafts of radius and ulna

MUSCLE:

ORIGIN: Posterior surface of shafts and radius and ulna

INSERTION: base of the metacarpal of the thumb

NERVE: Radial Nerve

ACTIONS: Abducts and extends the thumb at the carpometacarpal (CMC) joint

A

Abductor Pollicis Longus

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13
Q

Dorsal

MUSCLE:

ORIGIN: Lateral epicondyle of the humerus (via the common extensor tendon) (1)

INSERTION: Middle and distal phalanges of medial four fingers

NERVE: Radial nerve

ACTIONS: Extends fingers and hand

A

Extensor Digitorum

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14
Q

Dorsal

MUSCLE:

ORIGIN: Posterior surface of shaft ulna (1)

INSERTION: Extensor expansion of index finger

NERVE: Radial Nerve

ACTIONS: Extends metacarpophalangeal joint of INDEX finger

A

Extensor Indicis

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15
Q

MUSCLE:

ORIGIN: Lateral epicondyle of the humerus (2)

INSERTION: Extensor expansion of little finger

NERVE: Radial nerve

ACTIONS: Extends metacarpal phalangeal joint of LITTLE finger

A

Extensor Digiti Minimi

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16
Q

Dorsal

MUSCLE:

ORIGIN: Posterior surface of shaft of ULNA (2)

INSERTION: Base of DISTAL phalanx of thumb

NERVE: Radial nerve (Deep branch)

ACTIONS: Extends DISTAL phalanx of THUMB

A

Extensor Pollicis Longus

17
Q

Dorsal

MUSCLE:

ORIGIN: Posterior surface of shaft of RADIUS

INSERTION: Base of PROXIMAL phalanx of THUMB

NERVE: Radial nerve (Deep branch)

ACTIONS: Extends metacarpophalangeal joint of THUMB

A

Extensor Pollicis Brevis

18
Q

Intrinsic

MUSCLE :

ORIGIN: Tendons of flexor digitorum profundus

INSERTION: Extensor expansion of medial four fingers

NERVE: 1st and 2nd – median nerve
3rd and 4th - deep branch of ulnar nerve

ACTIONS: Flex metacarpophalangeal joints and extend interphalangeal joints of fingers EXCEPT thumb

A

Lumbricals

19
Q

MUSCLE:

ORIGIN: First arises from base of 1st metacarpal; remaining three from anterior surface of shafts of 2nd, 4th, and 5th metacarpals

INSERTION: Proximal phalanges of thumb and index, ring, and little fingers and dorsal extensor expansion of each finger

NERVE: Deep branch of ulnar nerve (1)

ACTIONS: (1)
• Adduct fingers toward center of third finger
• Both palmar and dorsal flex metacarpophalangeal joints and extend interphalangeal joints

A

Palmar interossei (3)

20
Q

Intrinsic

MUSCLE:

ORIGIN: Contiguous sides of shafts of metacarpal bones

INSERTION: Proximal phalanges of index, middle, and ring fingers and dorsal extensor expansion

NERVE: Deep branch of ulnar nerve (2)

ACTIONS: (2)
• Abduct fingers toward center of third finger
• Both palmar and dorsal flex metacarpophalangeal joints and extend interphalangeal joints

A

Dorsal interossei (4)

21
Q

Thenar (short muscles of thumb)

MUSCLE:

ORIGIN: Flexor retinaculum (1)

INSERTION: Shaft of metacarpal bone of thumb

NERVE: Median nerve (1)

ACTIONS: Pulls thumb medially and forward across palm

A

Opponens Pollicis

22
Q

Thenar (short muscles of thumb)

MUSCLE:

ORIGIN: Scaphoid, trapezium, flexor retinaculum

INSERTION: Base of proximal phalanx of thumb (1)

NERVE: Median nerve

ACTIONS: ABDUCTION of thumb

A

Abductor Pollicis Brevis

23
Q

Thenar (short muscles of thumb)

MUSCLE:

ORIGIN:
• Oblique head - 2nd and 3rd metacarpal bones
• transverse head - 3rd metacarpal bone

INSERTION: Base of proximal phalanx of thumb (2)

NERVE: Deep branch of ulnar nerve (2)

ACTIONS: ADDUCTION of thumb

A

Adductor Pollicis

24
Q

Thenar (short muscles of thumb)

MUSCLE:

ORIGIN: Flexor retinaculum (2)

INSERTION: Base of proximal phalanx of thumb (3)

NERVE: Median nerve

ACTIONS: Flexes metacarpophalangeal joint of thumb

A

Flexor Pollicis Brevis

25
Q

Hypothenar (short muscles of little finger)

MUSCLE:

ORIGIN: Flexor retinaculum (3)

INSERTION: Medial border fifth metacarpal bone

NERVE: Deep branch of ulnar nerve (3)

ACTIONS: Pulls 5th metacarpal forward as in cupping the palm

A

Opponens Digiti Minimi

26
Q

Hypothenar (short muscles of little finger)

MUSCLE:

ORIGIN: Pisiform bone

INSERTION: Base of proximal phalanx of LITTLE FINGER (1)

NERVE: Deep branch of ulnar nerve (4)

ACTIONS: ABDUCTS little finger

A

Abductor Digiti Minimi

27
Q

Hypothenar (short muscles of little finger)

MUSCLE:

ORIGIN: Flexor retinaculum (4)

INSERTION: Base of proximal phalanx of LITTLE FINGER (2)

NERVE: Deep branch of ulnar nerve (5)

ACTIONS: FLEXES little finger

A

Flexor Digiti Minimi

human anatomy (12 decks)

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