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KN 251 > Muscles of the Arm > Flashcards

Muscles of the Arm Flashcards

1
Q

Part of body that extends from shoulder to the elbow

A

Arm

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2
Q

The two groups of muscles that cause movement at the elbow joint

A

Anterior Flexors

Posterior Extensors

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3
Q

Name the three anterior arm muscles

A

Biceps Brachii (long and short head)
Brachialis
Brachioradialis

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4
Q

Anterior muscle of the arm that has two bellys, long and short, and two different origins with a common insertion

A

Biceps Brachii

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5
Q

Which muscle of the biceps brachii is lateral?

A

Long head

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6
Q

What are the actions of the biceps brachii?

A

Flexes forearm

Primary supinator against resistance like tightening a screw

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7
Q

Biceps brachii that is medial and has a tendon attached to the corocoid process of the scapula that is often fused with the corachobrachialis

A

Short head

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8
Q

Muscle of biceps brachii that has a rounded chord like tendon that crosses the shoulder joint within the capsule of the shoulder

Held in place by the transverse humeral ligament

A

Long head of the bicep

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9
Q

The distal tendon of the biceps attaches to what structure?

What does it become after it continues after that point?

A

The radial tuberosity

It continues on to become the bicipital aponeurosis

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10
Q

A fibrous sheet or expanded tendon that serves as a muscle attachment along the medial aspect of the proximal part of the forearm

A

Bicipital aponeurosis

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11
Q

An area on the anterior surface of the elbow joint that is protected by the bicipital aponeurosis (veins lie superior to it for veinipuncture)

A

Cubital fossa

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12
Q

Where the long head of the bicep originates

A

Scapula at supraglenoid tubercle

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13
Q

When this tendon is torn, it results in a muscle bulge on the anterior of the arm known as the popeye deformity

A

Long head of the bicep

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14
Q

Nerve that innervates both of the muscles of the biceps brachii

A

musculocutaneous nerve from the

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15
Q

Biceps brachii are involved in which two types of movement?

A

Flexion and supination

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16
Q

The long head of the bicep has the ability to do what to the shoulder because it crosses the shoulder joint?

A

Flex the shoulder

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17
Q

Flattened muscle which lies deep to the biceps brachii

A

Brachialis

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18
Q

Where is the origin of the brachialis?

A

Insertion of the Deltoid (Deltoid tuberosity)

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19
Q

The brachialis is primarily responsible for what movement, particularly during slow movements?

Does it for both supinated and pronated positions unlike the biceps brachii.

A

Maintaining flexion of the forearm

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20
Q

Muscle that ALWAYS contracts during flexion of the elbow joint

A

Brachialis

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21
Q

What is the origin of the brachialis?

A

Coracoid process of the ulna

22
Q

What nerve innervates the brachialis?

A

Musculocutaneous nerve

23
Q

Arm muscle which may be considered part of the posterior forearm muscles that flexes the forearm, especially during quick movement

A

Brachioradialis

24
Q

Does the brachioradialis cross the wrist joint? Can it cause wrist movement?

A

No and No

25
Q

This muscle is active in rapid movements (flexion) of the forearm

A

Brachioradialis

26
Q

The brachioradialis inserts where?

A

The styloid process of the radius

27
Q

What is the origin of the brachioradialis?

A

Lateral supercondyle ridge.

28
Q

What innervates the brachioradialis?

A

The radial nerve

29
Q

The muscle that the musculocutaneous nerve goes through

A

Coracobrachialis

30
Q

Nerve that hooks around the posterior aspect of the humerus towards the forearm

A

Radial nerve

31
Q

The two posterior muscles of the arm

A 
Triceps brachii (long, lateral, medial head)
Anconeus
32
Q

Which muscle of the triceps brachii crosses the shoulder joint?

A

Long head

33
Q

Part of triceps brachii that lies deep to the long head and lateral heads that is often hard to see without pushing aside the lateral head

A

Medial head

34
Q

Lateral and medial heads of the tricep are separated by what structure?

A

The radial groove

35
Q

What nerve runs in the radial groove?

A

The radial nerve

36
Q

Group of muscles that is the main extensor of the elbow joint, and can aid in arm adduction

A

Triceps Brachii

37
Q

The long head of the triceps brachii originates where?
The medial head of the triceps originates where?
The lateral head of the triceps originates where?

A

Infraglenoid tubercle
Posterior side of the humerus above radial groove
Below radial groove

38
Q

Where do all the triceps brachii muscles insert?

A

Olecranon process of the ulna

39
Q

What nerve innervates the triceps brachii?

A

Radial nerve

40
Q

All extensors innervated by which nerve?

A

Radial nerve

41
Q

The long head crosses the shoulder joint allowing it to aid in what movement?

A

Adduction

42
Q

What muscle make up the triangular space?

What structure does it contain?

A

Teres minor, teres major, long head of the triceps brachii

Circumflex scapular artery

43
Q

What muscle make up the quadrangular space?

A

Teres minor, teres major, long head and lateral head of the triceps brachii

44
Q

What nerve runs through the quadrangular space?

A

Axillary nerve

45
Q

What muscles make up the triangular interval?

A

Teres major, long and lateral heads of triceps brachii

46
Q

What nerve lies deep in the triangular interval?

A

Radial nerve

47
Q

Small triangular muscle on the posterior side of the elbow covered by a thick layer of deep fascia

A

Anconeus

48
Q

What movement does the anconeus help with?

A

Extension of the forearm

49
Q

Where does the anconeus originate?

A

Lateral condyle of the humerus

50
Q

Where does the anconeus insert?

A

The olecranon process of the ulna

51
Q

What innervates the anconeus?

A

The radial nerve

KN 251 (17 decks)

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