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Hand anatomy > Hand anatomy 1 > Flashcards

Hand anatomy 1 Flashcards

(64 cards)

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1
Q

What are the three flexor muscles of the wrist?

A

flexor carpi radialis
flexor carpi ulnaris
palmaris longus

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2
Q

What are the two flexor muscles of the fingers?

A

flexor digitorum superficialis and profundus

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3
Q

What are the two flexor muscles of the thumb?

A

flexor pollicis longus and brevis

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4
Q

What is the origin of the flexor carpi radialis

A

common flexor tendon from the medial epicondyle of the humerus

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5
Q

What is the insertion of the flexor carpi radialis

A

base of the 2nd and 3rd metacarpals

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6
Q

What is the action of the flexor carpi radialis

A

flexes the wrist and abducts the hand

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7
Q

What is the innervation of the flexor carpi radialis

A

median nerve

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8
Q

What is the origin of the flexor carpi ulnaris

A

common flexor tendon
medial border of olecranon
upper two thirds of the posterior border of the ulnar

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9
Q

What is the insertion of the flexor carpi ulnaris

A

pisiform
hook of hamate
base of 5th metacarpal

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10
Q

What is the action of the flexor carpi ulnaris

A

flexes wrist and adducts hand

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11
Q

What is the innervation of the flexor carpi ulnaris

A

ulnar nerve

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12
Q

What is the origin of the palmaris longus

A

Common flexor tendon from the medial epicondyle of the humerus

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13
Q

What is the insertion of the palmaris longus

A

Palmar aponeurosis

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14
Q

What is the action of the palmaris longus

A

Flexes the wrist

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15
Q

What is the innervation of the palmaris longus

A

Median nerve

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16
Q

What is the origin of the flexor digitorum superficialis

A

humeroulnar head - common flexor tendon
radial head - middle third of radius

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17
Q

What is the insertion of the flexor digitorum superficialis

A

shafts of the middle phalanges of digits 2-5

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18
Q

What is the action of the flexor digitorum superficialis

A

Flexes the metacarpophalangeal and proximal interphalangeal joints

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19
Q

What is the innervation of the flexor digitorum superficialis

A

Median nerve

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20
Q

What is the origin of the flexor digitorum profundus

A

Posterior border of the ulna
Proximal two thirds of the medial border of the ulna
Interosseous membrane

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21
Q

What is the insertion of the flexor digitorum profundus

A

Base of the distal phalanx of digits 2-5

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22
Q

What is the action of the flexor digitorum profundus

A

Flexes the metacarpophalangeal, proximal and distal interphalangeal joints

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23
Q

What is the innervation of the flexor digitorum profundus

A

Ulnar neve (ulnar one half) and median nerve (radial one half)

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24
Q

What is the origin of the flexor pollicis longus

A

Anterior surface of radius and interosseous membrane

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25
What is the insertion of the flexor pollicis longus
Base of the distal phalanx of the thumb
26
What is the action of the flexor pollicis longus
Flexes the metacarpophalangeal and interphalangeal joints of the thumb
27
What is the innervation of the flexor pollicis longus
Median nerve
28
What is the origin of the flexor pollicis brevis
Flexor retinaculum Trapezium
29
What is the insertion of the flexor pollicis brevis
Proximal phalanx of the 1st digit
30
What is the action of the flexor pollicis brevis
Flexes the carpometacarpal and metacarpophalangeal joints of the thumb
31
What is the innervation of the flexor pollicis brevis
Recurrent branch of the median nerve
32
What is the origin of the abductor pollicis brevis
Flexor retinaculum Scaphoid Trapezium
33
What is the insertion of the abductor pollicis brevis
Base of the proximal phalanx of the 1st digit
34
What is the action of the abductor pollicis brevis
Abducts thumb
35
What is the innervation of the abductor pollicis brevis
Recurrent branch of the median nerve
36
What is the origin of the opponens pollicis
Flexor retinaculum Trapezium
37
What is the insertion of the opponens pollicis
Shaft of the 1st metacarpal
38
What is the action of the opponens pollicis
Opposes thumb
39
What is the innervation of the opponens pollicis
Recurrent branch of the median nerve
40
What is the origin of the adductor pollicis
Oblique head - capitate and base of the 2nd and 3rd metacarpals Transverse head - shaft of the 3rd metacarpals
41
What is the insertion of the adductor pollicis
Base of the proximal phalanx of the thumb
42
What is the action of the adductor pollicis
Adducts the thumb
43
What is the innervation of the adductor pollicis
Deep branch of the ulnar nerve
44
How many annular and cruciate pulleys are there in each finger
5 annular and 3 cruciate
45
What is the function of annular pulleys
They bind the flexor tendons to the bone around each joint in the finger, preventing bowstringing
46
What the two most important pulleys
A2 and A4
47
What is the function of cruciate pulleys
They allow the flexor sheath to change length during flexion-extension
48
What is the largest and most important pulley in the thumb and where is it
The oblique pulley which lies between A1 and A2 obliquely across the proximal phalanx
49
What is the function of synovial sheaths in the hand
They are protective structures that are filled with synovial fluid which reduces friction and allows the tendons to slide freely
50
What are the three extensor muscles of the wrist
extensor carpi radialis brevis extensor carpi radialis longus extensor carpi ulnaris
51
What is the origin of the extensor carpi radialis brevis
Lateral supracondylar ridge of the humerus via the common extensor tendon
52
What is the insertion of the extensor carpi radialis brevis
Dorsum of the 3rd metacarpal (base)
53
What is the action of the extensor carpi radialis brevis
Extends the wrist and abducts the hand
54
What is the innervation of the extensor carpi radialis brevis
Radial nerve
55
What is the origin of the extensor carpi radialis longus
Lower one third of the lateral supracondylar ridge of the humerus
56
What is the insertion of the extensor carpi radialis longus
Dorsum of the 2nd metacarpal (base)
57
What is the action of the extensor carpi radialis longus
Extends the wrist and abducts the hand
58
What is the innervation of the extensor carpi radialis longus
Deep radial nerve
59
What is the origin of the extensor carpi ulnaris
Common extensor tendon and the middle one half of the posterior border of the ulna
60
What is the insertion of the extensor carpi ulnaris
Medial side of the base of the 5th metacarpal
61
What is the action of the extensor carpi ulnaris
Extends the wrist and adducts the hand
62
What is the innervation of the extensor carpi ulnaris
Deep radial nerve
63
What are the three extensor muscles of the fingers?
extensor digiti minimi extensor digitorum communis extensor indicis
64
Which 5 muscles form the common extensor tendon
extensor carpi radialis brevis extensor carpi radialis longus extensor digitorum extensor digiti minimi extensor carpi ulnaris muscles

Hand anatomy (1 decks)

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