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Y1 - MSK > Anterior Forearm > Flashcards

Anterior Forearm Flashcards

1
Q

What are the 3 compartments of the Anterior forearm?

A

Superficial compartment
Intermediate compartment
Deep compartment

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2
Q

What is the Function of the anterior forearm muscles?

A

Flexor
Pronators

(Wrist, fingers, thumb and forearm)

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3
Q

What is the main innervation of the anterior forearm muscles?

A

Median nerve

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4
Q

What muscles does the median nerve not innervate in the anterior forearm?

A

Ulnar half of flexor digitorum profundus
Flexor carpi ulnaris

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5
Q

What nerve innervates the Ulnar half of flexor digitorum profundus and flexor carpi ulnaris?

A

Ulnar nerve

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6
Q

What are the 4 superficial compartment anterior forearm muscles?

A

Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris

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7
Q

Where do all of the superficial compartment anterior forearm muscles originate?

A

Medial epicondyle

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8
Q

What is the medial epicondyle also know as?

A

Common flexor origin

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9
Q

How can you remember how the 4 superficial compartment muscles of the anterior forearm appear near the elbow?

A

Put thumb underneath medial epicondyle of humerus and put 4 fingers on top of forearm running diagonally
Index = Pronator Teres
Middle finger = Flexor carpi radialis
Ring finger = Palmaris longus
Little finger = Flexor carpi ulnaris

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10
Q

What is the extra origin of Pronator teres?
What is the insertion of Pronator teres?

A

Coranoid process of Ulna
Lateral side of Radius

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11
Q

What is the insertion of the Flexor carpi radialis?

A

Base of metacarpals II and III

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12
Q

What is the insertion Palmaris longus?

A

Flexor retinaculum of wrist
Palmar aponeurosis

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13
Q

What is the insertion of Flexor carpi ulnaris?

A

Pisiform of wrist
Hook of hamate
Base of 5th metacarpal

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14
Q

What is special about flexor carpi ulnaris?

A

It has 2 heads:
-Humeral head
-Ulnar head

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15
Q

What is the origin of the humeral head of Flexor carpi ulnaris?

A

Medial epicondyle of humerus

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16
Q

What is the origin of the ulnar head of Flexor carpi ulnaris?

A

Olecranon of ulnar

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17
Q

What are the 2 functions of Flexor carpi ulnaris?

A

Flexion of wrist
Adduction of wrist

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18
Q

What is the function of Pronator Teres?

A

Pronates forearm

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19
Q

What is function of flexor carpi radialis?

A

Flexor of wrist

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20
Q

What is the function of Palmaris longus?

A

Flexor of wrist

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21
Q

What is special about Palmaris longus?

A

Not present in everyone

22
Q

What pulse can be felt at the wrist?

A

Radial pulse from radial artery

23
Q

How can you locate the flexor carpi radialis at the wrist?

A

Its the first tendon medial to/going to the ulnar side of the radial artery

24
Q

How can you locate Palmaris longus if its present at the wrist?

A

Has a very long tendon and short muscle belly
Ulnar/medial direction to flexor carpi radialis

25
Q

How can you locate flexor carpi ulnaris?

A

Most medial/ulnar side tendon at the wrist

26
Q

What is the one intermediate compartment anterior forearm muscle?

A

Flexor digitorum superficialis

27
Q

What is special about flexor digitorum superficialis?

A

Has 2 heads

28
Q

What are the origins of the 2 heads of flexor digitorum superficialis?

A

Medial epicondyle of humerus
Radius

29
Q

What is the function of Flexor digitorum superficialis?

A

Finger Flexion (4 fingers):
-Metacarpophalangeal joint
-Proximal interphalangeal joint

Wrist Flexion

30
Q

Where does flexor digitorum superficialis insert?

A

Middle phalanges of 4 fingers

31
Q

What structure do the 4 tendons of flexor digitorum superficialis pass through at the wrist to reach the fingers?

A

Carpal tunnel

32
Q

What are the 3 deep muscles of the anterior forearm?

A

Flexor pollicis longus
Flexor digitorum profundus
Pronator Quadratus

33
Q

What is the origin of Pronator Quadratus?

34
Q

What is the insertion of Pronator Quadratus?

35
Q

What is the function of Pronator Quadratus?

A

Pronates forearm

36
Q

What is the shape of Pronator Quadratus and where abouts is it?

A

Square shaped
Near the wrist

37
Q

There are 2 halves to Flexor digitorum profundus. What are its 2 origins?

A

Ulnar and intraosseous membrane

38
Q

Where does the tendons of Flexor digitorum profundus insert?

A

Distal phalanges of the 4 fingers

39
Q

What structure does the 4 tendons of Flexor digitorum profundus pass through to reach the wrist?

A

Carpal tunnel

40
Q

What is the function of Flexor digitorum profundus?

A

Flexion of fingers:
-DISTAL INTERPHALANGEAL JOINTS (only muscle that can do this)
-Metacarpophalangeal joints
-Wrist

41
Q

How can you locate flexor digitorum profundus?

A

Sits deep to flexor digitorum superficialis

42
Q

How is flexor digitorum specially innervated?

A

Ulnar half = ULNAR NERVE

Lateral half = MEDIAN NERVE

43
Q

What fingers is the ulnar half of flexor digitorum profundus and therefore the ULNAR nerve responsible for flexing?

A

Little finger
Ring finger

44
Q

What fingers is the lateral half of flexor digitorum profundus and therefore the Median nerve responsible for flexing?

A

Middle finger
Index finger

45
Q

What is the origin of Flexor Pollicis longus?

A

Radius
Intraosseous membrane

46
Q

What is the function of Flexor pollicis longus?

A

Flexes the thumb:
-Metacarpophalangeal joint
-Interphalangeal joint

47
Q

What is special about Flexor pollicis longus?

A

Its a unipanate muscle:
Meaning the muscle only runs down 1 side of the tendon

48
Q

Where is flexor pollicis longus with respect to flexor digitorum profundus?

A

Flexor pollicis longus is lateral to flexor digitorum profundus

49
Q

What 2 tendons is Pronator Quadratus deep to?

A

Flexor Digitorum Profundus
Flexor Pollicis Longus

50
Q

What 2 muscles does the median nerve run between in the anterior forearm?

A

Flexor digitorum superficialis
Flexor digitorum profundus

51
Q

What 2 muscles is the ulnar nerve sandwiched between?

A

Flexor digitorum profundus
Flexor carpi ulnaris

Y1 - MSK (36 decks)

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