Muscels of the forearm ( palm and dorsal) Flashcards

1
Q

What are lumbricals ?

A

Four muscles that look like worms

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2
Q

Origin of lumbricals

A

Tendons of the Flexor digitorum profundus muscles

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3
Q

Insertion of lumbricals

A

Lateral sides of the extensor hoods

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4
Q

Action of lumbricals

A
  • Flexion at the metacarpophalangeal joints
    • Extends the dorsal interphalangeal joints
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5
Q

Innervation of lumbricals

A
  • Lateral two lumbricals by the median nerve
    • Medial two lumbricals by the ulnar nerve
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6
Q

Origin of Abductor pollicis brevis muscle (Thenar)

A
  • Tubercle of the trapezium and scaphoid
    • Adjacent flexor retinaculum
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7
Q

Insertion of Abductor pollicis brevis muscle (Thenar)

A

Proximal phalanx and extensor hood of thumb

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8
Q

Action of Abductor pollicis brevis muscle (Thenar)

A

Abducts the thumb at the metacarpophalangeal joint

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9
Q

Innervation of Abductor pollicis brevis muscle (Thenar)

A

Recurrent branch of the median nerve

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10
Q

Origin of flexor pollicis brevis muscle (Thenar)

A

Tubercle of the trapezium and the flexor retinaculum

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11
Q

Insertion of flexor pollicis brevis muscle (Thenar)

A

Proximal phalanx of the thumb

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12
Q

Action of flexor pollicis brevis muscle (Thenar)

A

Flexes thumb at metacarpophalangeal joint

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13
Q

Innervation of flexor pollicis brevis muscle (Thenar)

A

Recurrent branch of the median nerve

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14
Q

Origin of opponens pollicis muscle

A

Tubercle of the trapezium and the flexor retinaculum

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15
Q

Insertion of opponens pollicis muscle

A

Lateral margin and palmar surface of the 1st metacarpal

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16
Q

Action of opponens pollicis muscle

A

Medially rotates the thumb

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17
Q

Innervation of opponens pollicis muscle

A

Recurrent branch of the median nerve

18
Q

Origin of adductor pollicis muscle

A
  • Oblique head
    • Capitate and Bases of 2nd and 3rd metacarpals
    • Transverse head
      • Anterior surface of the shaft of the 3rd metacarpal
19
Q

Insertion of adductor pollicis muscle

A
  • Base of the proximal phalanx of the thumb
    • Extensor hood of the thumb
20
Q

Action of adductor pollicis muscle

A

Adducts the thumb

21
Q

Innervation of adductor pollicis muscle

A

Deep branch of the ulnar nerve

22
Q

Origin of abductor digit minimi muscle (hypothenar)

A
  • Pisiform and the pisohamate ligament
    • Tendon of the flexor carpi ulnaris muscle
23
Q

Insertion of abductor digit minimi muscle (hypothenar)

A

Proximal phalanx of the little finger

24
Q

Action of abductor digit minimi muscle (hypothenar)

A

Abducts little finger at metacarpophalangeal joint

25
Q

Innervation of abductor digit minimi muscle (hypothenar)

A

Deep branch of the ulnar nerve

26
Q

Origin of flexor digit minimi muscle (hypothenar)

A

Hook of the hamate and the flexor retinaculum

27
Q

Insertion of flexor digit minimi muscle (hypothenar)

A

Proximal phalanx of the little finger

28
Q

Action of flexor digit minimi muscle (hypothenar)

A

Flexes little finger at the metacarpophalangeal joint

29
Q

Innervation of flexor digit minimi muscle (hypothenar)

A

Deep branch of the ulnar nerve

30
Q

Origin of opponens digit minimi muscle (hypothenar)

A

Hook of the hamate and the flexor retinaculum

31
Q

Insertion of opponens digit minimi muscle (hypothenar)

A

Medial aspect of the 5th metacarpal

32
Q

Action of opponens digit minimi muscle (hypothenar)

A

Laterally rotates of the 5th metacarpal

33
Q

Innervation of opponens digit minimi muscle (hypothenar)

A

Deep branch of the ulnar nerve

34
Q

Origin of palmar interosseus muscles

A

Sides of the metacarpals

35
Q

Insertion of palmar interosseus muscles

A
  • Extensor hoods of the index, ring and little fingers
    • Proximal phalanx of the index, ring and little fingers
36
Q

Action of palmar interosseus muscles

A
  • Adduction of the index, ring and little fingers
    • Extension at the dorsal interphalangeal joints
37
Q

Innervation of palmar interosseus muscles

A

Deep branch of the ulnar nerve

38
Q

Origin of dorsal interosseus muscles

A

Adjacent metacarpals

39
Q

Insertion of dorsal interosseus muscles

A
  • Extensor hoods of the index, ring and middle fingers
    • Proximal phalanx of the index, ring and middle fingers
40
Q

Action of dorsal interosseus muscles

A
  • Abduction of the index, ring and middle fingers
    • Extension at the dorsal interphalangeal joints
41
Q

Innervation of

A