Arm Muscles Flashcards

0
Q

Brachialis

A

Origin: Lower half anterior surface humerus Inter muscular septa

Insertion: Ulnar tuberosity

Actions: Flexion arm

Innervation: Musculocutaneous (C5, C6)

Lateral side may receive radial n

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1
Q

Coracobrachialis

A

Origin: Coracoid process

Insertion: Anteromedial surface midshaft humerus

Actions: Flex arm

Adduct arm

Innervation: Musculocutaneous (C5-C7)

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2
Q

Biceps brachii

A

Origin: Short head- tip coracoid process

Long head- supraglenoid tubercle

Insertion: Radial tuberosity; Bicipital aponeurosis into fascia forearm

Actions: Flexion arm, Flexion forearm Supination arm

Innervation: Musculocutaneous (C5,C6)

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3
Q

Anconeus

A

Origin: Lateral epicondyle of humerus

Insertion: Lateral side olecranon of ulna

Actions: Extension forearm

Stabilize elbow joint against flexion or supination/ pronation

Innervation: Radial nerve (C7,C8)

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4
Q

Triceps brachii

A

Origin: Long head- infraglenoid tubercle

Lateral head- posterior surface humerus above lateral groove medial nerve and lateral inter muscular septa

Medial head-posterior surface humerus below medial groove radial nerve and both intermuscular septa

Insertion: Lateral side olecranon of ulna

Actions: Extension forearm

Innervation: Radial nerve (C7,C8)

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5
Q

Coracobrachialis: Origin

A

Coracoid process of scapula

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6
Q

Coracobrachialis: Insertion

A

Anteromedial surfaces midshaft humerus

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7
Q

Coracobrachialis: Actions

A

Flex arm

adduct arm

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8
Q

Coracobrachialis: Innervation

A

Musculocutaneous (C5-C7)

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9
Q

Biceps Brachii: Origin

A

Short head: tip coracoid process

Long head: Supraglenoid tubercle scapula

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10
Q

Biceps brachii: Insertion

A

Radial tuberosity

Bicipital aponeurosis into facia forearm

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11
Q

Biceps brachii: Actions

A

Flexion arm

Flexion forearm

Supination forearm

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12
Q

Biceps brachii: Innervation

A

Musculocutaneous (C5, C6)

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13
Q

**Brachialis: Origin **

A

Lower 1/2 anterior surface humerus intermuscular septa

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14
Q

Brachialis: Insertion

A

Ulnar tuberosity

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15
Q

Brachialis: Actions

A

Flexion arm

16
Q

Brachialis: Innervation

A

Musculocutaneous (C5,C6)

Lateral side may recieve radian

17
Q

Triceps brochii: Origin

A

Long head- infraglenoid tubercle

Lateral head- Posterior surface humerus above and lateral groove radial nerve and lateral intermuscular septum

Medial head- Posterior surface humerus below medial to groove of radial nerve and both intermuscular septum

18
Q

Triceps brachii: Insertion

A

Proximal end of oleranon of ulna

19
Q

**Triceps brachii: Actions **

A

Extension forearm

Extension arm (long head)

20
Q

Triceps brachii: Innervation

A

Radial nerve (C6-C8)

21
Q

Anconeus: Origin

A

Lateral epicondyle of humerus

22
Q

Anconeus: Insertion

A

Lateral side of olecranon of ulna

23
Q

Anconeus: Actions

A

Extension forearm

stabilize elbow joint against flexion or prontation-supination

24
Q

Anconeus: Innervation

A

Radial nerve (C7,C8)