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Anatomy YBOD 200 > Muscles Of The Forearm And Cubital Fossa > Flashcards

Muscles Of The Forearm And Cubital Fossa Flashcards

1
Q

How many muscles are in the anterior compartment of the forearm and how are they grouped?

A

Consists of 8 muscles
Divided into 3 groups
1. Superficial group with 4 muscles
2. Intermediate group with 1 muscle
3. Deep group with 3 muscles

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2
Q

The muscles of anterior compartment muscles of forearm are innervated

A

Innervated by median and ulnar nerves

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3
Q

Name the muscle of the superficial group of the forearm

A
  1. Pronator Teres muscle
  2. Palmars longus
  3. Flexor carpi radialis
  4. Flexor carpi ulnaris
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4
Q

Name the muscle of the superficial group of the forearm innervated by median nerve

A

Palmaris longus
Flexor carpi radialis
Pronator Teresa muscle

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5
Q

Name the muscle of the forearm in the superficial group that is innervated by ulnar nerve

A

Flexor carpi ulnaris muscle

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6
Q

The insertion , action and origin of the pronator teres muscles

A

Originates from medial epicondyle and coronoid processes of the ulna
They insert at the Lateral aspect of the shaft if the radius
Their action is Pronation

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7
Q

The action, insertion and origin if the flexor carpi radialis muscle

A

Originates at the medial epicondyle of the humerus.
Insert at the base of the second and third metacarpals
Action: flexion and abdution at the wrist joint

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8
Q

The origin, insertion and action of palmaris longus muscle

A

Originates at the medial epicondyle of the humerus
Insert at the Palmar aponeuorosis and distal half of the flexor retinaculum
Action: Tenses Palmar aponeurosis and flexes the wrist

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9
Q

The origin, insertion and action of flexor carpi ulnaris of muscles

A

Originates Medial epicondyle and posterior border of ulna
Insert at the pisiform, hook of hamate and the base of the 5th netacarpal
Action: flexion and adduction of the wrist joint

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10
Q

The muscle of the anterior compartment under intermediates group

A

Flexor digitorum superficialis muscle

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11
Q

The origin and insertion of the flexor digitorum superficialis muscle

A

Origin: medial epicondyle and coronoid process of the humerus
Anterior surface of radius
Insertion: Palmar surface of the shaft of the middle phalanges of the medial 4 digits

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12
Q

The action and innervation of flexor digitorum superficialis muscle

A

Action: flexion of the proximal interphalangeal joints
May assits in flexion of the wrist and metacarpophalangeal joints
Innervated by median nerve

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13
Q

Name the muscles of the deep group of the anterior compartment

A

Flexor digitorum profundus
Flexor pollicis longus muscle
Pronator quadratus muscle

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14
Q

The origin and insertion of flexor digitorum profundus muscle

A

Origin- anterior and medial surfaces of ulna
Medial half of the interosseous membrane
Insert at the bases of the distal phalanges of the medial four digits

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15
Q

The action and innervation of flexor digitorum profundus muscle

A

Action
- Flexion of the distal interphalangeal joints
Innervation
- Medial half by the ulnar nerve
- Lateral half by the anterior interosseous nerve
- From the median nerve

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16
Q

The origin and insertion of flexor pollicis longus

A

Origin
- Anterior surface of the shaft of the radius
Insertion
- Base of the distal phalanx of the thumb

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17
Q

The action and innervation of flexor pollicis longus

A

Action
- Flexion of the interphalangeal joint of the thumb
Innervation by anterior interosseous nerve from median nerve

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18
Q

The origin and insertion pronator quadratus muscles

A

Origin
- Distal surface of the anteromedial aspect of the ulnar shaft
Insertion
- Distal surface of the anterolateral aspect of the radial shaft

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19
Q

The action and innervation of pronator quadratus muscle

A

Action
- Pronation
Innervation by anterior interosseous nerve from median nerve

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20
Q

The cubital fossa is covered by what?

A
  • Covered by skin and fascia
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21
Q

The base of the cubital fossa

A

Imaginary line between the humeral epicondyles

22
Q

The lateral and medial border of the cubital fossa

A

Lateral border
Brachioradialis muscle
Medial border
Pronator teres muscle

23
Q

The roof and floor of the cubital fossa

A

Roof
Skin, fascia, superficial nerves and vessels
Floor
Brachialis and supinator muscles

24
Q

The content of cubital fossa

A

Tendon of the Biceps brachii muscle
- Brachial artery
- Median nerve

25
Q

The posterior compartment comprised of superficial and deep group that are grouped in into 3s name those group

A

-They are grouped in 3s
- 3 go to the wrist
- 3 go to the thumb
- 3 go to the fingers
- 3 are additional

26
Q

The origin and insertion of brachioradialis muscle

A

Origin
- Proximal part of the lateral supraepicondylar ridge of the humerus
- Adjacent intermuscular septum
Insertion
- Lateral surface of distal end of radius

27
Q

The action and insertion of brachioradialis muscle

A

Action
- Accessory flexor of elbow joint when forearm is midpronated
Insertion by the Radial nerve

28
Q

The origin and insertion Extensor carpi radialis longus muscle

A

Origin
- Lateral supraepicondylar ridge of the humerus
Insertion
- Dorsal surface of base of the 2nd metacarpal

29
Q

The action and innervation of extensor carpi radialis longus muscle

A

Action
- Extends and abducts at the wrist joint
Innervation
- Radial nerve

30
Q

The origin and insertion of extensor carpi radialis brevis

A

Origin
- Lateral epicondyle of humerus and adjacent intermuscular septum
Insertion
- Dorsal surface of base of 2nd and 3rd metacarpals

31
Q

The action and innervation of extensor carpi radialis brevis

A

Action
- Extends and abducts at the wrist joint
Innervation
- Deep branch of the radial nerve

32
Q

The origin and in insertion extensor digitorium

A

Origin
- Lateral epicondyle of humerus
- Adjacent intermuscular septum and deep fascia
Insertion
- Inserts via extensor hoods of medial 4 digits

33
Q

The action and innervation of extensor digitorum

A

Action
- Extends medial 4 digits
Innervation by the Posterior interosseous nerve from radial nerve

34
Q

The origin and insertion extensor digit minim muscle

A

Origin
- Lateral epicondyle of the humerus
- Adjacent intermuscular septum
Insertion
- Extensor hood of the little finger

35
Q

The innervation and action of extensor digit minim muscle

A

Action
- Extension of the little finger
Innervation by the Posterior interosseous nerve from radial nerve

36
Q

The origin and insertion extensor carpi ulnaris muscle

A

Origin
- Lateral epicondyle of the humerus and posterior border of ulna
Insertion
- Tubercle on the base of the medial side of the 5th metacarpal

37
Q

The innervation and action of extensor carpi ulnaris muscle

A

Action
- Extends and adducts at the wrist joint
Innervation by the Posterior interosseous nerve from radial nerve

38
Q

The origin and insertion of anconeus muscle

A

Origin
- Lateral epicondyle of the humerus
Insertion
- Olecranon and proximal posterior surface of ulna

39
Q

The innervation and action of anconeus muscle

A

Action
- Abducts the ulna during pronation
Innervation
- Radial nerve

40
Q

The origin and insertion of supinator muscles

A

Origin
- Superficial layer
- Humeral lateral epicondyle, radial collateral and annular ligament
- Deep layer at the supinator crest of the ulna
Insertion
- Lateral surface of the radius

41
Q

The action and innervation of supinator muscle

A

Action
- Supination
Innervation by the Posterior interosseous nerve from radial nerve

42
Q

The origin and insertion of extensor indicis muscle

A

Origin
- Posterior surface of the ulna
- Adjacent interosseous membrane
Insertion
- Extensor hood of the index finger

43
Q

The action and innervation of extensor indicis muscle

A

Action
- Extends the index finger
Innervation by the Posterior interosseous nerve from radial nerve

44
Q

the origin and insertion of extensor pollicis longus muscle

A

Origin
- Posterior surfaces of the ulna
- Adjacent interosseous membrane
Insertion
- Dorsal surface of base of proximal phalanx of the thumb

45
Q

The action and innervation of extensor pollicis longus muscles

A

Action
- Extends interphalangeal joint of the thumb
Innervation by the Posterior interosseous nerve from radial nerve

46
Q

The origin and insertion of extensor pollicis brevis muscle

A

Origin
- Posterior surfaces of the radius
- Adjacent interosseous membrane
Insertion
- Dorsal surface of base of proximal phalanx of the thumb

47
Q

The action and innervation of extensor pollicis brevis muscle

A

Action
- Extends metacarpophalangeal joint of the thumb
Innervation by the Posterior interosseous nerve from radial nerve

48
Q

The origin and insertion of abductor pollicis longus muscle

A

Origin
- Posterior surfaces of the ulna and radius
- Adjacent interosseous membrane
Insertion
- Lateral side of the base of the first metacarpal

49
Q

The action and innervation of abductor pollicis longus muscle

A

Action
- Abducts carpometacarpal joint of thumb
Innervation by the Posterior interosseous nerve from radial nerve

50
Q

what forms the floor of anatomy snuffbox

A

scaphoid

51
Q

which pulse that can be found in the anatomy snuffbox

A

pulse of radial artery

52
Q

name the muscles that bounds the anatomy snuffbox medial and laterally

A
  • Extensor pollicis longus muscle (Medially)
    • Abductor pollicis longus and Extensor pollicis brevis muscles
      (Laterally

Anatomy YBOD 200 (55 decks)

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