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Module 204 MSK & Immune system > DR3 Forearm > Flashcards

DR3 Forearm Flashcards

1
Q

What is the common flexor origin?

A

Medial epicondyle of humerus

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2
Q

What is the origin, insertion and function of palmaris longus?

A

Origin: CFO
Insertion: palmar aponeurosis
Function: flexion of wrist

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3
Q

What is the palmar aponeurosis?

A

Thick sheet of dense fibrous connective tissue over central region of palm of hand

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4
Q

What is the origin, insertion and function of flexor carpi radialis?

A

Origin: CFO
Insertion: Base of 2nd and 3rd metacarpal bones
Function: flexion and abduction of wrist

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5
Q

What is the origin, insertion and function of flexor carpi ulnaris

A

Origin: CFO
Insertion: pisiform bone and 5th metacarpal
Function: flexion and adduction

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6
Q

What is the origin, insertion and function of pronator teres?

A

Origin: CFO
Insertion: radius
Function: pronation of wrist

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7
Q

What is the origin, insertion and function of flexor digitorum superficial?

A

Origin: CFO
Insertion: middle phalanges of D2-D5
Function: Flexion at metacarpophalangeal and proximal interphalangeal joint of digits 2-5, flexes at wrist

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8
Q

What is the origin, insertion and function of flexor digitorum profundus?

A

Origin: Ulna
Insertion: distal phalanges of digits 2-5
Function: flexion of distal interphalangeal, metacarpophalangeal and wrist joints

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9
Q

What is the origin, insertion and function of flexor pollicis longus?

A

Origin: anterior surface radius
Insertion: base of distal phalanx of digit 1
Function: flexion of thumb

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10
Q

What is the origin, insertion and function of pronator quadratus?

A

Origin: Anterior surface ulna
Insertion: anterior surface radius
Function: pronate forearm

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11
Q

What is flexor retinaculum?

A

Strong band of fibrous connective tissue that crosses wrist and holds tendons in place to prevent them bowing
Forms roof of carpal tunnel

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12
Q

What are the superficial muscles of the flexor / anterior compartment?

A 
Palmaris longus
Flexor carpi radialis
Flexor carpi ulnaris
Pronator teres
Flexor digitorum superficialis
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13
Q

What are the deep muscles of the flexor / anterior compartment?

A

Flexor digitorum profundus
Flexor pollicis longus
Pronator quadrates

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14
Q

What does the brachial artery branch into?

A

Radial artery

Ulna artery

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15
Q

What does the ulnar artery branch into?

A

Common interosseous artery

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16
Q

What does the common interosseous artery branch into?

A

Anterior interosseous artery

Posterior interosseous artery

17
Q

Describe the path of the ulnar nerve

A

Passes through cubital tunnel into forearm, under flexor carpi ulnaris.
crosses wrist to lie superficial to flexor retinaculum.
Within the hand it divides into deep and superficial branch

18
Q

What does the ulnar nerve supply?

A

Flexor carpi ulnaris
Ulnar side of flexor digitorum profundus
Intrinsic muscles of hand

19
Q

Describe the path of the median nerve

A

Enters forearm between 2 heads of pronator teres

Passes into carpal tunnel to lie superficial and deep to digital flexor tendons

20
Q

What does the median nerve supply?

A

Muscles of anterior compartment except flexor carpi ulnaris

Muscles in hand forming ball of thumb

21
Q

Describe the path of the musculocutaneous nerve

A

Enters forearm as lateral cutaneous nerve of forearm

22
Q

What does the musculocutaneous nerve supply?

A

Skin on dorsal and ventral side of forearm

23
Q

What are the superficial muscles of the poster compartment of the forearm?

A 
Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor carpi ulnaris
Extensor digitorum
Extensor digiti minimi
Extensor indicis
24
Q

What is the origin, insertion and function of brachioradialis?

A

Origin: lateral supracondylar ridge of humerus
Insertion: styloid process at distal end of radius
Function: flexion of forearm

25
Q

What is the origin, insertion and function of extensor carpi radialis longus?

A

Origin: lateral supracondylar ridge of humerus
Insertion: base of metacarpal II
Function: extend and abduct wrist

26
Q

What is the origin, insertion and function of extensor carpi radialis brevis?

A

Origin: CEO
Insertion: dorsal aspect of base of 3rd metacarpal
Function: extend and abduct wrist

27
Q

What is the origin, insertion and function of extensor carpi ulnaris?

A

Origin: CEO
Insertion: dorsal aspect of base of metacarpal 5
Function: extend and adduct wrist

28
Q

What is the origin, insertion and function of extensor digitorum?

A

Origin: CEO
Insertion: 4 tendons insert into middle and distal phalanges of digits 2-5
Function: extends proximal and distal interphalangeal joints

29
Q

What is the origin, insertion and function of extensor digiti minimi?

A

Origin: CEO
Insertion: extensor hood of digit 5
Function: extension of digit 5

30
Q

What is the origin, insertion and function of extensor indicis?

A

Origin: Posterior surface ulna
Insertion: extensor hood digit 2
Function: extend digit 2

31
Q

What are the deep muscles in the posterior compartment of the forearm?

A

Abductor pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
Supinator

32
Q

What is the origin, insertion and function of abductor pollicis longus?

A

Origin: interosseous membrane and posterior surface of radius and ulna
Insertion: base metacarpal I
Function: abducts thumb

33
Q

What is the origin, insertion and function of extensor pollicis brevis?

A

Origin: posterior surface radius
Insertion: base proximal phalanx thumb
Function: extend at metacarpophalangeal and carpometacarpal joints of thumb

34
Q

What is the origin, insertion and function of extensor pollicis longus?

A

Origin: posterior surface ulna
Insertion: distal phalanx thumb
Function: extend all joints of thumb

35
Q

What is the origin, insertion and function of supinator?

A

Origin: ulna and humerus
Insertion: posterior surface radius
Function: supinates forarm

36
Q

Describe the path of the radial nerve

A

Enters anterior compartment of forearm at lateral side, crosses supinator. Divides into deep and superficial branch

37
Q

Describe the path of the deep branch of the radial nerve

A

Goes to posterior interosseous nerve which pierces supinator to enter posterior compartment to supply extensors

38
Q

Describe the path of the superficial branch of the radial nerve

A

Passes down forearm under brachioradialis, deep to tendon of brachioradialis near wrist where it divides into several digital branches to supply skin on dorsolateral aspect of hand.

Module 204 MSK & Immune system (44 decks)

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