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Semester 2 Case Studies > Forearm muscles > Flashcards

Forearm muscles Flashcards

1
Q

muscles in the anterior superficial compartment of the forearm

A

flexor carpi ulnaris
flexor carpi radialis
palmaris longus
pronator teres

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2
Q

what are the muscles in the anterior intermediate compartment of the forearm

A

flexor digitorum superfificalis

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3
Q

what muscles are in the deep anterior compartment of the forearm

A

flexor pollicis longus
flexor digitorum profundus
pronator quadratus

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4
Q

flexor carpi ulnaris

A

Origin: humeral head from medial epicondyle and ulnar head from the olecranon of the ulna

Insertion: attaches to the pisiform bone, hook of hamate and base of 5th metacarpal

Actions: Flexion and adduction of the wrist

Innervation: ulnar nerve

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5
Q

palmaris longus

A

Origin: medial epicondyle

Insertion: flexor retinaculum of the wrist

Actions: flexion of the wrist

Innervation: median nerve

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6
Q

flexor carpi radialis

A

Origin: medial epicondyle

Insertion: Metacarpals 2 and 3

Actions: flexion and abduction at the wrist

innervation: median nerve

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7
Q

pronator teres

A

Origin: one from medial epicondyle and the other from the coronoid process of the ulna

Insertion: attaches laterally to the mid-shaft of the radius

Action: pronation of the forearm

Innervation: median nerve

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8
Q

diagram of the anterior superficial compartment of the forearm

A
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9
Q

what muscle is in the intermediate component of the forearm

A

flexor digitorum superficialis

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10
Q

Flexor digitorum superficialis

A

Origin: medial epicondyle and the radius

Insertion: middle phalanges of the 4 fingers

Action: flexes the metacarpophalangeal joints and the proximal interphalangeal joints and flexes the wrist

Innervation: median nerve

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11
Q

muscles found in the deep compartment of the anterior forearm

A

flexor digitorum profundus
flexor pollicis longus
pronator quadratus

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12
Q

flexor digitorum profundus

A

Origin: ulna

Insertion: distal phalanges of the four fingers

Actions: flexes the distal interphalangeal joints of the fingers

Innervation: medial half (on little and ring finer) is innervated by ulnar nerve.
The lateral half is innervated by the medial nerve

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13
Q

flexor pollicis longus

A

Origin: anterior surface of radius

Insertion: attaches to the base of the distal phalanx of the Thumb

Actions: flexes the interphalangeal joint and metacarpophalangeal joint of the thumb

Innervation: median nerve

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14
Q

pronator quadratus

A

Origin: anterior surface of the ulna

Insertion: anterior surface of the radius

Actions: pronates the forearm

Innervation: median nerve

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15
Q

diagram of the deep muscles of the anterior forearm

A
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16
Q

prosection of the superficial anterior forearm

A
17
Q

prosection of the deep layer of the anterior forearm

A
18
Q

brachioradialis

A

superficial layer

origin; lateral supracondylar ridge of the humerus

Insertion; distal end of the radius

action; flexes the elbow

innervation; radial nerve

19
Q

extensor carpi radialis longus

A

superficial

origin; supracondylar ridge

insertion; metacarpal bones 2 and 3

action; extend and abducts the wrist

innervation; radial nerve

20
Q

extensor carpi radialis brevis

A

superficial

origin; lateral epicondyle

insertion; metacarpal bones 2 and 3

action; extends and abducts the wrist

innervation; radial nerve

21
Q

extensor digitorum communis

A

superficial

origin; lateral epicondyle

insertion; extensor hood of each finger

action; extends medial four fingers at joints

innervation; radial nerve

22
Q

extensor digiti minimi

A

superficial

origin; lateral epicondyle of humerus

insertion; extensor hood of the little fingers

action; extends the little finger

innervation; radial nerve

23
Q

extensor carpi ulnaris

A

superficial

origin; lateral epicondyle

insertion; attaches to the base of metacarpal 5

action: etension and adduction of wrist
innervation: radial nerve

24
Q

diagram of superficial compartment of the posterior compartment

A
25
Q

supinator

A

deep

origin; lateral epicondyle and posterior surface of the ulna

insertion; posterior surface of the radius

action; supinates the forearm

innervation; radial nerve

26
Q

abductior polices longus

A

deep

origin; interosseous membrane and posterior surface of ulna and radius

insertion; metacarpal 1

action; abducts the thumb

innervation; radial nerve

27
Q

extensor pollicis brevis

A

deep

origin; radius and membrane

insertion; base of proximal phalynx of the thumb

action; extends the MCI and CM joints of the thumb

innervation; radial nerve

28
Q

extensor pollicis longus

A

deep

origin; ulna and membrane

insertion; distal phalanx of the thumb

action; extends all joints of the thumb

innervation; radial nerve

29
Q

extensor indices propius

A

deep

origin; ulna and membrane

insertion; attaches to extensor hood of index finger

action; extends the index finer

innervation; radial nerve

Semester 2 Case Studies (11 decks)

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