Muscles Of The Forearm And Cubital Fossa

Question 1

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

Answer 1

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

Question 2

The muscles of anterior compartment muscles of forearm are innervated

Answer 2

Innervated by median and ulnar nerves

Question 3

Name the muscle of the superficial group of the forearm

Answer 3

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

Question 4

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

Answer 4

Palmaris longus
Flexor carpi radialis
Pronator Teresa muscle

Question 5

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

Answer 5

Flexor carpi ulnaris muscle

Question 6

The insertion , action and origin of the pronator teres muscles

Answer 6

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

Question 7

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

Answer 7

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

Question 8

The origin, insertion and action of palmaris longus muscle

Answer 8

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

Question 9

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

Answer 9

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

Question 10

The muscle of the anterior compartment under intermediates group

Answer 10

Flexor digitorum superficialis muscle

Question 11

The origin and insertion of the flexor digitorum superficialis muscle

Answer 11

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

Question 12

The action and innervation of flexor digitorum superficialis muscle

Answer 12

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

Question 13

Name the muscles of the deep group of the anterior compartment

Answer 13

Flexor digitorum profundus
Flexor pollicis longus muscle
Pronator quadratus muscle

Question 14

The origin and insertion of flexor digitorum profundus muscle

Answer 14

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

Question 15

The action and innervation of flexor digitorum profundus muscle

Answer 15

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

Question 16

The origin and insertion of flexor pollicis longus

Answer 16

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

Question 17

The action and innervation of flexor pollicis longus

Answer 17

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

Question 18

The origin and insertion pronator quadratus muscles

Answer 18

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

Question 19

The action and innervation of pronator quadratus muscle

Answer 19

Action
- Pronation
Innervation by anterior interosseous nerve from median nerve

Question 20

The cubital fossa is covered by what?

Answer 20

• Covered by skin and fascia

Question 21

The base of the cubital fossa

Answer 21

Imaginary line between the humeral epicondyles

Question 22

The lateral and medial border of the cubital fossa

Answer 22

Lateral border
Brachioradialis muscle
Medial border
Pronator teres muscle

Question 23

The roof and floor of the cubital fossa

Answer 23

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

Question 24

The content of cubital fossa

Answer 24

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

Question 25

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

Answer 25

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

Question 26

The origin and insertion of brachioradialis muscle

Answer 26

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

Question 27

The action and insertion of brachioradialis muscle

Answer 27

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

Question 28

The origin and insertion Extensor carpi radialis longus muscle

Answer 28

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

Question 29

The action and innervation of extensor carpi radialis longus muscle

Answer 29

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

Question 30

The origin and insertion of extensor carpi radialis brevis

Answer 30

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

Question 31

The action and innervation of extensor carpi radialis brevis

Answer 31

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

Question 32

The origin and in insertion extensor digitorium

Answer 32

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

Question 33

The action and innervation of extensor digitorum

Answer 33

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

Question 34

The origin and insertion extensor digit minim muscle

Answer 34

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

Question 35

The innervation and action of extensor digit minim muscle

Answer 35

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

Question 36

The origin and insertion extensor carpi ulnaris muscle

Answer 36

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

Question 37

The innervation and action of extensor carpi ulnaris muscle

Answer 37

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

Question 38

The origin and insertion of anconeus muscle

Answer 38

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

Question 39

The innervation and action of anconeus muscle

Answer 39

Action - Abducts the ulna during pronation Innervation - Radial nerve

Question 40

The origin and insertion of supinator muscles

Answer 40

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

Question 41

The action and innervation of supinator muscle

Answer 41

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

Question 42

The origin and insertion of extensor indicis muscle

Answer 42

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

Question 43

The action and innervation of extensor indicis muscle

Answer 43

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

Question 44

the origin and insertion of extensor pollicis longus muscle

Answer 44

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

Question 45

The action and innervation of extensor pollicis longus muscles

Answer 45

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

Question 46

The origin and insertion of extensor pollicis brevis muscle

Answer 46

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

Question 47

The action and innervation of extensor pollicis brevis muscle

Answer 47

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

Question 48

The origin and insertion of abductor pollicis longus muscle

Answer 48

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

Question 49

The action and innervation of abductor pollicis longus muscle

Answer 49

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

Question 50

what forms the floor of anatomy snuffbox

Answer 50

scaphoid

Question 51

which pulse that can be found in the anatomy snuffbox

Answer 51

pulse of radial artery

Question 52

name the muscles that bounds the anatomy snuffbox medial and laterally

Answer 52

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