Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

MICN201 2025 Musculoskeletal > Muscles of the Arm and Forearm > Flashcards

Muscles of the Arm and Forearm Flashcards

(61 cards)

Start Studying
1
Q

What are the compartments of the arm?

A

Anterior (Flexor) and Posterior (Extensor) compartments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Name the muscles of the anterior compartment of the arm.

A
  • Biceps brachii (Long & Short Heads)
  • Brachialis
  • Coracobrachialis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the primary action of the biceps brachii?

A

Elbow flexion and forearm supination

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Which nerve supplies the muscles of the anterior compartment of the arm?

A

Musculocutaneous nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the primary action of the triceps brachii?

A

Elbow extension

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the heads of the triceps brachii?

A
  • Long Head
  • Medial Head
  • Lateral Head
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the nerve supply for the triceps brachii?

A

Radial nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What muscles primarily flex the elbow joint?

A
  • Biceps brachii
  • Brachialis
  • Brachioradialis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Fill in the blank: The _______ is a powerful supinator.

A

Biceps brachii

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Name the muscles located in the anterior superficial compartment of the forearm.

A
  • Pronator teres
  • Flexor Carpi Radialis
  • Palmaris Longus
  • Flexor Digitorum Superficialis
  • Flexor Carpi Ulnaris
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the action of the flexor digitorum profundus?

A

Flexion of distal interphalangeal joints

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

True or False: The palmaris longus is absent in some individuals.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the muscles of the superficial posterior compartment of the forearm?

A
  • Brachioradialis
  • Extensor Carpi Radialis Longus
  • Extensor Carpi Radialis Brevis
  • Extensor Digitorum
  • Extensor Digiti Minimi
  • Extensor Carpi Ulnaris
  • Anconeus
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which muscle is responsible for wrist extension + Radial deviation (abduction)?

A

Extensor Carpi Radialis Longus and Extensor Carpi Radialis Brevis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Fill in the blank: The _______ is the main extensor of the elbow joint.

A

Triceps brachii

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the anatomical snuffbox?

A

A depression formed by the APL and EPB tendons on the anterior/radial border and EPL on the posterior/ulnar border

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are the contents of the anatomical snuffbox?

A

Radial artery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What structure allows for finger extension?

A

Dorsal Digital Expansion/Extensor hood

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Which muscles contribute to the extensor hood?

A
  • Extensor Digitorum
  • Extensor Indicis
  • Extensor Digiti Minimi
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What actions occur at the wrist joint?

A
  • Flexion
  • Extension
  • Radial Deviation
  • Ulnar Deviation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

List the superficial group muscles of the anterior compartment of the forearm.

A
  • Pronator teres
  • Flexor Carpi Radialis
  • Palmaris Longus
  • Flexor Digitorum Superficialis
  • Flexor Carpi Ulnaris
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is the action of the pronator quadratus?

A

Pronation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is the muscle located in the superficial layer of the forearm that is responsible for pronation?

A

Pronator teres (PT)

The pronator teres is a muscle of the forearm that helps in the pronation of the forearm.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

List the muscles in the superficial layer of the forearm.

A
  • Pronator teres (PT)
  • Flexor Carpi Radialis (FCR)
  • Palmaris Longus (PL)
  • Flexor Digitorum Superficialis (FDS)
  • Flexor Carpi Ulnaris (FCU)

These muscles are primarily responsible for flexion and pronation of the wrist and fingers.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What are the components of the deep layer of the forearm?
* Flexor Pollicis Longus (FPL) * Flexor Digitorum Profundus (FDP) * Pronator Quadratus (PQ) ## Footnote These muscles are involved in flexing the thumb and fingers.
26
What are the three heads of the triceps muscle?
* Long head * Lateral Head * Medial Head ## Footnote The triceps muscle is located in the posterior compartment of the arm and is responsible for elbow extension.
27
List the muscles in the superficial layer of the posterior compartment of the forearm.
* Brachioradialis (BR) * Extensor Carpi Radialis Longus (ECRL) * Extensor Carpi Radialis Brevis (ECRB) * Extensor Digitorum (ED) * Extensor Digiti Minimi (EDM) * Extensor Carpi Ulnaris (ECU) * Anconeus ## Footnote These muscles primarily extend the wrist and fingers.
28
What is the role of the supinator muscle?
It is responsible for supinating the forearm ## Footnote The supinator is a deep layer muscle located in the posterior compartment of the forearm.
29
What are the muscles found in the deep layer of the posterior compartment of the forearm?
* Supinator * Extensor Indicis (EI) * Extensor Pollicis Longus (EPL) * Extensor Pollicis Brevis (EPB) * Abductor Pollicis Longus (APL) ## Footnote These muscles assist in extending the wrist and fingers and in thumb movement.
30
Fill in the blank: The _______ is a muscle that extends the index finger.
Extensor Indicis (EI) ## Footnote The extensor indicis is specifically responsible for extension of the index finger.
31
True or False: The Flexor Carpi Ulnaris (FCU) is located in the deep layer of the forearm.
False ## Footnote The Flexor Carpi Ulnaris (FCU) is part of the superficial layer of the forearm.
32
What are the two compartments of the arm?
Anterior and posterior compartments ## Footnote These compartments are separated by intermuscular septa.
33
Which muscle is primarily found in the anterior compartment of the arm?
Biceps brachii ## Footnote The biceps brachii has two heads: long and short.
34
What nerve supplies the anterior compartment muscles?
Musculocutaneous nerve ## Footnote This nerve arises from the lateral cord of the brachial plexus.
35
What is the proximal attachment of the long head of the biceps brachii?
Supraglenoid tubercle of the scapula
36
Where does the biceps brachii attach distally?
Tendon to radial tuberosity, aponeurosis to deep fascia
37
What are the main actions of the biceps brachii?
Elbow flexion and forearm supination
38
What is a common injury to the biceps brachii?
Damage to the long head ## Footnote Surgery may be required for distal injuries.
39
What is the primary function of the brachialis muscle?
Pure elbow flexor
40
What is the proximal attachment of the coracobrachialis muscle?
Coracoid process of the scapula
41
What is the distal attachment of the coracobrachialis?
Shaft of the humerus
42
What action does the coracobrachialis perform?
Shoulder flexion
43
What are the muscles involved in elbow flexion?
Biceps brachii, brachialis, brachioradialis
44
What are the muscles involved in forearm pronation?
Pronator teres and pronator quadratus
45
What are the muscles involved in forearm supination?
Biceps brachii and supinator
46
What structures separate the anterior and posterior compartments?
Intermuscular septa and interosseous membrane
47
How many superficial and deep muscles are in the anterior compartment?
Superficial: 5, Deep: 3
48
What is the proximal attachment for all superficial anterior muscles?
Medial epicondyle of the humerus
49
Which muscle is absent in some individuals among the superficial anterior muscles?
Palmaris longus
50
What is the distal attachment of the flexor digitorum superficialis?
Middle phalanges of 2nd to 5th fingers
51
What does the flexor digitorum profundus attach to?
Ulna shaft and interosseous membrane
52
Which nerve supplies the flexor carpi ulnaris?
Ulnar nerve
53
What are the components of the deep layer of the anterior compartment?
Flexor digitorum profundus, flexor pollicis longus, pronator quadratus
54
What is the most lateral muscle in the superficial posterior compartment?
Brachioradialis
55
What is the primary action of the extensor indicis?
Extension of the index finger
56
What is the anatomical snuffbox?
Contains the radial artery
57
What are the extensor muscles of the fingers?
ED, EDM, EI
58
What structure do the extensor tendons form at the phalanges?
Dorsal digital expansion / extensor hood
59
What is the shape formed by the extensor tendons at the phalanges?
Triangular shape
60
What type of deviation is characterized by moving the wrist away from the midline?
Radial deviation
61
What type of deviation is characterized by moving the wrist towards the midline?
Ulnar deviation

MICN201 2025 Musculoskeletal (23 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions