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Anatomy > Muscles of the Hand > Flashcards

Muscles of the Hand Flashcards

(52 cards)

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1
Q

Extensor Tendon Compartment #1 (Lateral to Medial)

A

ABductor Pollicis Long, Extensor Pollicis Brevis

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2
Q

Extensor Tendon Compartment #2(Lateral to Medial)

A

Extensor Carpi Radialis Longus and Extensor Carpi Radialis Brevis

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3
Q

Extensor Tendon Compartment #3 (Lateral to Medial)

A

Extensor Pollicis Longus

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4
Q

Extensor Tendon Compartment #4 (Lateral to Medial)

A

Extensor Digitorum and Extensor Indicis

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5
Q

Extensor Tendon Compartment #5 (Lateral to Medial)

A

Extensor Digiti Minimi

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6
Q

Extensor Tendon Compartment #6 (Lateral to Medial)

A

Extensor Carpi Ulnaris

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7
Q

Muscle of the Thenar compartment

A
  1. ABductor Pollicis Brevis
  2. Flexor Pollicis Brevis
  3. Opponens Pollicis
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8
Q

Abductor Pollicis Brevis Origin

A

Flexor Retinaculum and lateral pillars of carpal tunnel (scaphoid and trapezium bones)

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9
Q

Abductor Pollicis Brevis Insertion

A

Lateral side, base of proximal phalanx and extensor hood of thumb

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10
Q

Abductor Pollicis Brevis Innervation

A

Motor recurrent branch of the Median Nerve (C8/T1)

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11
Q

Abductor Pollicis Brevis Action

A

Abduction of the thumb

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12
Q

Flexor Pollicis Brevis Origin

A

Flexor retinaculum and tubercle of the trapezium bone

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13
Q

Flexor Pollicis Brevis Insertion

A

Lateral side, base proximal phalanx; sesamoid bone at head of 1st metacarpal bone

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14
Q

Flexor Pollicis Brevis Innervation

A

Motor recurrent branch of the Median Nerve C8/T1

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15
Q

Flexor Pollicis Brevis Action

A

Flexion of thumb

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16
Q

Opponens Pollicis Origin

A

Flexor Retinaculum and tubercle of trapezium bone

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17
Q

Opponens Pollicis Insertion

A

Whole length of 1st metacarpal bone, palmar surface and lateral margin

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18
Q

Opponens Pollicis Innervation

A

Motor recurrent nerve of Median Nerve (C8-T1)

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19
Q

Opponens Pollicis Action

A

Thumb opposition (Rotates 1st MC medially and draws thumb toward center of palm)

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20
Q

Adductor Pollicis Origin

A

Oblique head: base of MC #2 and #3; Capitate bone

Transverse Head: Anterior Surface of shaft of MC #3

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21
Q

Adductor Pollicis Insertion

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A

Medial side, base of proximal phalanx and extensor hood of thumb; sesamoid bone at head of 1st metacarpal

22
Q

Adductor Pollicis Innervation

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A

Deep branch of ulnar nerve (C8/T1)

23
Q

Adductor Pollicis Action

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A

Thumb Adduction

24
Q

Muscles of the Hypothenar Eminence

Study These Flashcards
A
  1. Abductor Digiti Minimi
  2. Flexor Digiti Minimi Brevis
  3. Opponens Digiti Minimi
25
Abductor Digiti Minimi Origin
Pisiform bone, tendon of Flexor Carpi Ulnars, and pisohamate ligament
26
Abductor Digiti Minimi Insertion
Medial side, base of proximal phalanx of little finger, DDE
27
Abductor Digiti Minimi Innervation
Deep branch of ulnar nerve (C8/T1)
28
Abductor Digiti Minimi Action
Abduction of little finger
29
Flexor Digiti Minimi Brevis Origin
Flexor retinaculum and hook of hamate
30
Flexor Digiti Minimi Brevis Insertion
Medial side, base of proximal phalanx of little finger
31
Flexor Digiti Minimi Brevis Innervation
Deep branch of Ulnar nerve (C8/T1)
32
Flexor Digiti Minimi Brevis Action
Flexion of the little finger at MP joint
33
Opponens Digiti Minimi Origin
Flexor retinaculum and hood of hamate
34
Opponens Digiti Minimi Insertion
Medial margin and palmar surface of shaft of #5 MC
35
Opponens Digiti Minimi Innervation
Deep branch of Ulnar Nerve (C8/T1)
36
Opponens Digiti Minimi Action
Draws 5th finger forward and rotates it laterally for opposition
37
Intrinsic muscles of the hand (not part of the Thenar and hypothenar eminence)
``` Adductor pollicis Palmaris Brevis Lumbricals Dorsal Interossei palmar Interossei ```
38
Palmaris Brevis Origin
Flexor retinaculum and palmar aponeurosis (medial margin)
39
Palmaris Brevis Insertion
Skin on medial side of palm; Blends with fascia over hypothenar eminence (both attachments are soft)
40
Palmaris Brevis Innervation
Superficial branch of ulnar nerve ( C8/T1)
41
Palmaris Brevis Action
Tenses skin over hypothenar eminence and deepens the hallow of the hand
42
Lumbricals Origin
Tendons of the Flexor Digitorum Profundus - #1/2 are unipennate muscles: Lateral (Radial) side of FDP tendons to index and middle fingers - #3/4 are bipennate muscles: Adjacent sides of FDP tendons to middle ring, and little finger
43
Lumbricals Insertion
Lateral (radial Side) of the DDE to fingers 2, 3, 4, 5
44
Lumbricals Innervation
``` #1/#2 by Median Nerve (Common Palmar digital branches) #3/4 by deep Branch of Ulnar Nerve (all C8-T1) ```
45
Lumbricals Action
MP flexion, PIP and DIP extension of fingers 2-5
46
Dorsal Interossei Origin (Bipennate)
Adjacent Sides of 2 MC Bones
47
Dorsal Interossei Insertion
Base of proximal phalanx of fingers 2,3,4 and DDE: ``` #1: Lateral side of index finger #2: Lateral side of middle finger #3: Medial Side of middle finger #4: medial side of ring finger ```
48
Dorsal Interossei Innervation
Deep branch of nerve (C8/T1)
49
Dorsal Interossei Action
Abduction of Fingers #2-4 at MP joints; MP Flexion, IP Extension via DDE and digits 2-4
50
Palmar/Volar Inerossei Origin
Palmar shaft surface of MC 1, 2, 4, and 5 Medial Side: #1, 2 Lateral side: #4, 5
51
Palmar/Volar Inerossei Insertion
Base proximal phalanx, fingers 1, 2, 4, and 5 and DDE - Fingers 1-2 on medial Side - Fingers 4-5 on Lateral side
52
Palmar/Volar Inerossei Innervation
Deep branch of ulnar nerve (C8-T1)

Anatomy (18 decks)

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