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MSK Upper Limb Anatomy > Anterior Compartment of Arm > Flashcards

Anterior Compartment of Arm Flashcards

1
Q

Anterior compartment of arm muscles act on

A

Elbow and Superior Radio-Ulnar Joint

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2
Q

What are the 3 main muscles of ant compartment of arm?

A

Biceps Brachii, Brachialis and Coracobrachialis

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3
Q

What Is the most superficial muscle of ant compartment of arm

A

Biceps Brachii

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4
Q

Biceps Brachii arises from

A

Scapula via two heads

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5
Q

Biceps brachii tendon inserts onto

A

Radial Tuberosity

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5
Q

Biceps brachii tendon inserts onto

A

Radial Tuberosity

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6
Q

Short head of biceps muscle originates from

A

Coracoid Process of Scapula

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7
Q

Long head of biceps muscle originates from

A

Supraglenoid Tubercle of Scapula

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8
Q

Biceps tendon runs down where?

A

Bicipital Groove of Humerus

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9
Q

Biceps Brachii action

A

Flexes shoulder and elbow

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10
Q

Biceps action at superior radio ulnar joint

A

Pronation where radius rotates over Ulna

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11
Q

The coracobrachialis origin

A

Tip of Coracoid Process

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12
Q

Coracobrachialis insertion

A

Medial mid shaft of humerus

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13
Q

Coracobrachialis action

A

Flex arm at shoulder

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14
Q

Brachialis muscle arises from

A

Ant surface of distal shaft of humerus

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15
Q

Brachialis attachment

A

Coracoid Process of Ulna

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16
Q

Brachialis muscle action

A

Flex elbow

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17
Q

Musculocutaneous Nerve arises as

A

Terminal branch from lateral cord of brachial plexus

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18
Q

Main nerve of ant compartment of arm

A

Musculocutaneous Nerve

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19
Q

What nerve supplies all muscles in ant compartment of arm

A

Musculocutaneous Nerve

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20
Q

Musculocutaneous Nerve enters arm by

A

perforating the coracobrachialis, descending distally between the biceps brachii and brachialis muscles. After crossing the elbow joint it gives off its terminal branch to supply the skin as the lateral cutaneous nerve of the forearm.

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21
Q

Segmental or root value of musculocutaneous nerve

A

C5 to C7

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22
Q

Does the musculocutaneous nerve supply any muscles in the forearm or hand?

A

Brachialis, Biceps Brachii and Coracobrachialis

23
Q

Anterior compartment of arm actions

A

Flexors of Wrist and Digits and Pronation of Forearm

24
Q

Pronation of forearm at Radio-Ulnar Joint is caused by what compartment of arm

A

Anterior Compartment

25
Q

The medial epicondyle of humerus acts as

A

Common flexor origin for superficial and intermediate flexors

26
Q

The palmar is longus is a muscle which is absent in what percentage of people

A

20%

27
Q

Action of pronator teres

A

Pronation of forearm and weak elbow flexion

28
Q

Action of pronator teres

A

Pronation of forearm and weak elbow flexion

29
Q

Apart from flexing the wrist, which superficial muscle is involved in adduction (ulnar deviation) of the wrist joint?

A

flexor carpi ulnas

30
Q

Apart from flexing the wrist, which superficial muscle is involved in abduction (radial deviation) of the wrist joint?

A

flexor carpi radialis

31
Q

Flexor Digitorum Superficialis lies where

A

deep to superficial group of flexors in forearm

32
Q

which muscle is seen as only muscle on immediate group of forearm

A

flexor digitorum superficialis

33
Q

The flexor digitorum superficially gives rise to

A

4 tendons

34
Q

To which digits (fingers) are the 4 tendons of FDS attached?

A

Middle Phalanges of Four Fingers

35
Q

On which phalanx are the 4 tendons of FDS attached

A

Palmar Surfaces of distal phalanges of digits 2-5

36
Q

The flexor digitorum superficially flexes

A

Wrist, Metacarpophalangeal and Proximal Interphalangeal Joints

37
Q

What nerve innervates flexor digitorum superficialis

A

Median

38
Q

Where does the brachioradialis act

A

Elbow

39
Q

Main action of brachioradialis

A

Flex elbow

40
Q

nerve which innervates brachioradialis

A

radial nerve

40
Q

nerve which innervates brachioradialis

A

radial nerve

41
Q

The radial nerve only innervates

A

extensor muscles

41
Q

The radial nerve only innervates

A

extensor muscles

42
Q

which muscle is the exception to the rule that all flexors lie in anterior compartment?

A

brachioradialis

43
Q

The flexor digitorum Profundus is in relation to?

A

Ulna

44
Q

The flexor pollicis longus is in relation to

A

Radius

45
Q

The pronator quadrates which is closely related to

A

distal parts of both bones

46
Q

Where does the Flexor Digitorum Profundus lie

A

Deeply in front of forearm

47
Q

What is the main action of flexor digitorum profundus on wrist and finger joints

A

flexes digital interphalngeal joint of digits 2,3 , 4 and 5 assists with wrist flex

48
Q

the flexor digitorum profundus innervation

A

ulnar and median

49
Q

which part of flexor digitorum profundus is supplied by ulnar nerve

A

medial part: ulnar nerve c8 and t1

50
Q

which part of flexor digitorum profundus is supplied by median nerve

A

lateral part: median nerve c8 and t1

50
Q

which part of flexor digitorum profundus is supplied by median nerve

A

lateral part: median nerve c8 and t1

51
Q

What is the long flexor of thumb

A

Flexor Pollicis Longus

52
Q

Which nerve innervates Flexor Pollicis Longus?

A

Median Nerve

53
Q

Innervation of Pronator Quadratus

A

Ant Interosseous Nerve from Median Nerve C8 and T1

MSK Upper Limb Anatomy (35 decks)

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