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Muscle Biology > Extensors of the forearm > Flashcards

Extensors of the forearm Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

Superficial Extensor Muscle Group

A 
Brachioradialis
Extensor Carpi Radialis Longus
Extensor Carpi Radialis Brevis
Extensor Digitorum
Extensor Digiti Minimi
Extensor Carpi Ulnaris
Anconeous
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2
Q

Origin of the Brachioradialis

A

Upper lateral supracondylar ridge of the humerus

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3
Q

Insertion of the Brachioradialis

A

Lateral radius above styloid process

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4
Q

innervation of any extensor muscle

A

radial nerve

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5
Q

Action of the Brachioradialis

A
  • Flexion of the elbow when in a neutral position
  • Supination when the arm is pronated
  • Pronation when the arm is supinated
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6
Q

Origin of the Extensor Carpi Radialis Longus

A

Lower lateral supracondylar ridge of the humerus

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7
Q

Insertion of the Extensor Carpi Radialis Longus

A

Base of the 2nd metacarpal

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8
Q

Action of the Extensor Carpi Radialis Longus

A

Wrist extension

-Radial deviation (with the flexor carpi radialis)

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9
Q

Origin of the Extensor Carpi Radialis Brevis

A

Lateral epicondyle of the humerus

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10
Q

Insertion of the Extensor Carpi Radialis Brevis

A

Base of 3rd metacarpal

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11
Q

Action of the Extensor Carpi Radialis Brevis

A

Wrist extension

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12
Q

Origin of the Extensor Digitorum

A

Lateral epicondyle of humerus

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13
Q

Insertion of the Extensor Digitorum

A

Extensor hood

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14
Q

Action of the Extensor Digitorum

A

-Extension of all finger joints

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15
Q

Origin of the Extensor Digiti Minimi

A

Lateral epicondyle

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16
Q

Insertion of the Extensor Digitorum Minimi

A

Extensor hood of 5th finger

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17
Q

Action of the Extensor Digiti Minimi

A

Extension of 5th finger

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18
Q

Origin of the Extensor Carpi Ulnaris

A

Lateral epicondyle of humerus

19
Q

Insertion of the Extensor Carpi Ulnaris

A

Base of 5th metacarpal

20
Q

Deep Extensor Muscle Group

A 
Supinator
Abductor Pollicis Longus
Extensor Pollicis Brevis
Extensor Pollicis Longus
Extensor Indicis
21
Q

Origin of the Supinator

A
  • Lateral epicondyle of humerus
  • Annular ligament
  • Superior crest of the ulna
22
Q

Insertion of the Supinator

A

Upper radius

23
Q

Action of the Supinator

A

Supinates the forearm

24
Q

Origin of the Abductor Pollicis Longus

A
  • Posterior ulna
  • Posterior radius
  • Interosseous membrane
25
Q

Insertion of the Abductor Pollicis Longus

A

Base of the 1st metacarpal

26
Q

Action of Abductor Pollicis Longus

A

Abducts the thumb

27
Q

Origin of the Extensor Pollicis Brevis

A
  • Distal radius

- Interosseous membrane

28
Q

Insertion of the Extensor Pollicis Brevis

A

Base of the proximal phalanx of the thumb

29
Q

Action of the Extensor Pollicis Brevis

A

Extends MCP joint of thumb

30
Q

Origin of the Extensor Pollicis Longus

A
  • Posterior ulna

- Interosseous membrane

31
Q

Insertion of the Extensor Pollicis Longus

A

Base of the distal phalanx of the thumb

32
Q

Action of the Extensor Pollicis Longus

A

Extends the thumb

33
Q

Origin of the Extensor Indicis

A

Posterior distal ulna

34
Q

Insertion of the Extensor Indicis

A

Extensor hood on index finger

35
Q

Action of the Extensor Indicis

A

Extension of index finger

36
Q

carpi means

A

wrist

37
Q

pollicis means

A

thumb

38
Q

indices

A

index finger

39
Q

3 radial extensor muscles

A

brachioradialis
extensor carpi radialis longus
extensor carpi radialis brevis

40
Q

3 digit extensor muscles

A

extensor digitorum
extensor indicis
extensor digiti minimi

41
Q

3 pollicis extensor muscles

A

extensor pollicis longus
extensor pollicis brevis
abductor pollicis longus

42
Q

tendons and blood supply of anatomical snuff box

A

tendons - extensor pollicis longus, brevis, abductor pollicis longus
blood supply - cephalic vein, radial artery

43
Q

3 other extensor muscles

A

extensor carpi ulnaris
anconeus
supinator

Muscle Biology (25 decks)

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