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Human Anatomy: Muscles > Muscles of the Arm > Flashcards

Muscles of the Arm Flashcards

1
Q

Biceps Brachii

A

Origin: Long head- Supraglenoid tubercle of Scapula. Short head- Coracoid process of scapula.

Insertion: Radial tuberosity

Actions: Elbow flexion, Forearm supination, Flexion of the shoulder

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1
Q

Brachialis

A

Origin: Anterior shaft of humerus.

Insertion: Coronoid process of ulna

Actions: Elbow flexion

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2
Q

Brachioradialis

A

Origin: Lateral distal humerus

Insertion: Styloid process of radius

Actions: Elbow flexion

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3
Q

Triceps Brachii

A

Origin:
Long head- Infraglenoid tubercle of scapula.
Medial head- Posterior medial humerus.
Lateral- Posterior lateral humerus

Insertion: Olecranon process of ulna

Actions:
Extension of elbow
Extension of arm at shoulder (Long head only)

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4
Q

Anconeus

A

Origin: Lateral epicondyle of humerus

Insertions:
Olecranon
Shaft of Ulna

Actions: Elbow extension

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5
Q

What are the superficial forearm muscles?

A

Pronator teres, Flexor carpi radialis, palmaris longus, flexor carpi ulnaris

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6
Q

What do the superficial forearm muscles do?

A

Action:
Elbow flexion
Elbow extension
PT- Pronates forearm (no wrist flexion)

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7
Q

Where do the superficial forearm muscles originate?

A

The Common Flexor Origin or the CFO is the Medial epicondyle of the humerus

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8
Q

Where does the pronator teres insert?

A

Lateral Radius

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9
Q

Where does the Flexor carpi radialis insert?

A

Metacarpals

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10
Q

Where does the Palmaris longus insert?

A

Palmar aponeurosis

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11
Q

Where does the flexor carpi ulnaris insert?

A

Pisiform; Metacarpals

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12
Q

What is the intermediate forearm muscle?

A

The Flexor Digitorum Superficialis (FDS)

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13
Q

Where does the flexor digitorum superficialis originate?

A

The medial epicondyle of the humerus, ulna, and radius

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14
Q

Where does the flexor digitorum superficialis insert?

A

Middle phalanges of digits 2-5

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15
Q

What does the flexor digitorum superficialis do?

A

Flexion of the elbow, wrist and fingers

16
Q

What are the deep anterior forearm muscles?

A

Flexor digitorum profundus (FDP)
Flexor pollicis longus (FPL)
Pronator Quadratus (PQ)
Supinator

17
Q

Flexor Digitorum Profundus

A

Origin: Ulna and interosseus membrane

Insertion: Distal phalanges (digits 2-5)

Action: Flexion of wrist and fingers

18
Q

Flexor Pollicis Longus

A

Origin: Radius and Interosseus membrane

Insertion: Distal phalanx of thumb

Action: Flexion of wrist and thumb

19
Q

Pronator Quadratus

A

Origin: Ulna

Insertion: Radius

Action: Forearm pronation

20
Q

What are the superficial posterior forearm muscles?

A

Extensor carpi radialis longus
Extensor carpi ulnaris
Extensor digitourm
Extensor carpi radialis brevis

21
Q

Where do the superficial posterior forearm muscles originate?

A

The Common Extensor Origin (CEO) or the Lateral Epicondyle of the Humerus

22
Q

Where do the superficial posterior forearm muscles insert?

A

Insertion:
Extensor Digitorum- Distal Phalanx of digits 2-5
Others- Metacarpals

23
Q

What do the superficial posterior forearm muscles do?

A

Actions:
All- extension of wrist and elbow
Extensor Digitorum- Finger Extension of digits 2-5

24
Q

What are the deep posterior forearm muscles?

A

Supinator, Abductor pollicis longus, Extensor pollicis longus, Extensor indicis, Extensor pollicis brevis

25
Q

Where do the deep posterior forearm muscles originate?

A

Radius, Ulna and Interosseous membrane
Supinator: CEO (Lateral epicondyle of the humerus) and the Ulna

26
Q

Where do the deep posterior forearm muscles insert?

A

The thumb and first metacarpal
Supinator: Radius

27
Q

What do the deep posterior forearm muscles do?

A

Actions:
Wrist extension
Finger/thumb extension
Abductor pollicis longus- Thumb abduction
Supinator- Forearm supination

28
Q

To flex the distal interphalangeal joint of the four medial digits of the hand, which muscle from the
ones listed must be working?

A

The Flexor Digitorum Profundus

Human Anatomy: Muscles (5 decks)

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