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MD1S1: Anatomy 201 > Flexors of the Forearm > Flashcards

Flexors of the Forearm Flashcards

1
Q

What are the layers of the forearm flexors?

A
  • Superficial layer
  • Intermediate layer
  • Deep layer
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2
Q

What are the muscles of the superficial layer of the forearm?

A

Medial –> lateral:
* Flexor carpi ulnaris
* Flexor carpi longus
* Flexor carpi radialis
* Pronator teres

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3
Q

Origin of the flexor carpi radialis

A

Medial epicondyle of the humerus

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4
Q

Insertion of the flexor carpi radialis

A

Base of metacarpals 2 and 3

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5
Q

Action of flexor carpi radialis

A

Flexes and abducts the wrist joint

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6
Q

Nerve supply of the flexor carpi radialis

A

Median nerve

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7
Q

Origin of the palmaris longus

A

Medial epicondyle of the humerus

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8
Q

Insertion of palmaris longus

A

Palmar aponeurosis of the hand

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9
Q

Action of palmaris longus

A
  • Flexion of wrist joint
  • Tenses the skin when the hand grips
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10
Q

Nerve supply of palmaris longus

A

Median nerve

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11
Q

Origins of the flexor carpi ulnaris

A
  • Medial epicondyle
  • Olecranon
  • Posterior border of ulna
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12
Q

Insertions of the flexor carpi ulnaris

A
  • Pisiform bone
  • Hamate
  • Base of metacarpal 5
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13
Q

Action of the flexor carpi ulnaris

A

Flexes and adducts the wrist joint

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14
Q

Nerve supply of flexor carpi ulnaris

A

Ulnar nerve

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15
Q

Origins of the pronator teres

A
  • Medial epicondyle
  • Coranoid process
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16
Q

Insertion of the pronator teres

A

Lateral surface, mid-shaft of radius

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16
Q

Action of the pronator teres

A

Pronation

16
Q

Nerve supply of the pronator teres

A

Median nerve

17
Q

What are the muscles of the intermediate layer?

A

Flexor digitorum superficialis

18
Q

Origin of flexor digitorum superficialis

A
  • Medial epicondyle of the humerus
  • Coronoid process
  • Oblique line of the radius
19
Q

Insertion of the flexor digitorum superficialis

A

Palmar surface of the middle phalanges of the medial 4 fingers

20
Q

Action of flexor digitorum superficialis

A
  • Flexes proximal inter-phalangeal joints of the medial 4 fingers
  • Flex metacarpo-phalangeal joints of the same fingers and the wrist joint
21
Q

Nerve supply of flexor digitorum superficialis

A

Median nerve

22
Q

What are the muscles of the deep layer?

A
  • Flexor digitorum profundus
  • Flexor policis longus
  • Pronator quadratus
23
Q

Origin of flexor digitorum profundus

A

Upper part of front of ulna

24
Q

Insertion of flexor digitorum profundus

A

Palmar surfaces of the distal phalanges (medial 4 fingers)

24
Q

Insertion of flexor digitorum profundus

A

Palmar surfaces of the distal phalanges (medial 4 fingers)

25
Q

Action of flexor digitorum profundus

A

Flexes distal inter-phalangeal joints, metacarpo-phalangeal joints of the medial 4 fingers and flexes the wrist joint

26
Q

Nerve supply of flexor digitorum profundus

A

Lateral ½ by anterior interosseous branch of median nerve
Medial ½ by ulnar nerve

27
Q

Origin of flexor policis longus

A

Upper part of anterior surface of radius

28
Q

Insertion of flexor policis longus

A

Palmar surface of base of distal phalanx of thumb

29
Q

Action of flexor policus longus

A
  • Flexes inter-phalangeal joint
  • Flexes metacarpo-phalangeal joints of the thumb
30
Q

Nerve supply of flexor policis longus

A

Anterior interosseous of median nerve

31
Q

Diagram of flexor digitorum profundus and flexor digitorum superficialis

A
32
Q

Origin of pronator quadratus

A

Distal anterior surface of ulna

33
Q

Insertion of pronator quadratus

A

Distal anterior surface of radius

34
Q

Action of pronator quadratus

A

Pronation

35
Q

Nerve supply of pronator quadratus

A

Anterior interosseous branch of median nerve

36
Q

What is the origin of the radial artery?

A

Originates from the brachial artery at the neck of radius

37
Q

Describe the course of the radial artery

A

In proximal and middle forearm: Lies deep to the brachioradialis muscle
In distal forearm: Lies between the tendon of the brachioradialis laterally and the tendon of flexor carpi radialis medially

38
Q

What is the origin of the ulnar artery?

A

Originates from the brachial artery at the neck of radius

39
Q

What is the course of the ulnar artery?

A
  • Leaves the cubital fossa by passing deep to the pronator teres muscle
  • Passes through the forearm between flexor carpi ulnaris and flexor digitorum profundus muscles
  • Distal forearm, it lies lateral to the ulnar nerve

MD1S1: Anatomy 201 (24 decks)

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