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Gross Anatomy > Brachial Muscles > Flashcards

Brachial Muscles Flashcards

1
Q

INFRASPINATUS

A

Origin: infraspinatus fossa

insertion: greater tubercle of the middle facet
innervation: suprascapular (4-6)
action: external rotation

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2
Q

TERES MINOR

A

origin: lateral border of scapula
insertion: greater tubercle of inferior facet
innervation: axillary N (5-6)
action: external rotation, weak adductor

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3
Q

SUBSCAPULARIS

A

origin: subscapularis fossa
insertion: lesser tubercle of the humerus
innervation: subscapular N (5-6)
action: internal rotation

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4
Q

TERES MAJOR

A

origin: inferior angle of the scapula
insertion: crest of lesser tubercle
innervation: lower subscapularis (5-7)
action: internal rotation, adduction, and extension

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5
Q

DELTOID (clavicular)

A

origin: lateral third of the clavicle
insertion: deltoid tuberosity of the humerus
innervation: axillary (5-6)
action: flexion, adduction, internal rotation

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6
Q

DELTOID (acromial)

A

origin: acromion
insertion: deltoid tuberosity
innervation: axillary n (5-6)
action: abduction

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7
Q

DELTOID (scapular spine)

A

origin: scapular spine
insertion: deltoid tuberosity of the humerus
innervation: axillary n (5-6)
action: extension, adduction, internal rotation

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8
Q

PECTORALIS MAJOR (clavicular)

A

origin: medial half of the clavicle
insertion: crest of the greater tubercle of the humerus
innervation: medial and lateral pectoral (3-1)
action: flexion, assist in respiration, adduction, internal rotation

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9
Q

PECTORALIS MAJOR (abdominal)

A

origin: rectus sheath
insertion: crest of greater tubercle of the humerus
innervation: medial and lateral pectoral (3-1)
action: flexiom respiration, adduction, internal rotation

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10
Q

PECTORALIS MAJOR (sternal)

A

origin: costal cartilage 1-6 and sternum
insertion: greater tubercle of the humerus
innervation: medial and lateral pectoral (3-1)
action: adduction, internal rotation

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11
Q

PECTORALIS MINOR

A

origin: 3-5th ribs
insertion: coracoid process
innervation: medial pectoralis (8-1)
action: depress scapula, assist in respiration, rotate glenoid cavity

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12
Q

SUBCLAVIUS

A

origin: 1st rib
insertion: inferior surface of the clavicle
innervation: subclavius (5-6)
action: steadies clavicle in sternoclavicular joint

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13
Q

OMOHYOID

A

origin: superior border of scapula
insertion: hyoid bone
innervation: ansa cervicalis of cervical plexus (1-3)
action: depress the hyoid and larynx

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14
Q

BICEPS BRACHII LONG

A

origin: supraglenoid tubercle of scapula
insertion: radial tuberosity
innervation: musculocutaneous (5-6)
action: elbow- flexion, supination; shoulder- flexion, abduction, internal rotation

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15
Q

BICEPS BRACHII SHORT

A

origin: coracoid process
insertion: radial tuberosity
innervation: musculocutaneous (5-6)
action: elbow- flexion, supination; shoulder- flexion, abduction, internal rotation

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16
Q

BRACHIALIS

A

origin: distal half of anterior surface of the humerus
insertion: ulnar tuberosity
innervation: musculocutaneous and radial nerve (C7)
action: flexion at the elbow joint

17
Q

CORACOBRACHIALIS

A

origin: coracoid process
insertion: inline with the crest of the lesser tubercle of the humerus
innervation: musculocutaneous and radial nerves (c5-c7)
action: flexion, adduction, lateral rotation

18
Q

TRICEPS LONG

A

origin: infraglenoid tubercle
insertion: olecranon process
innervation: radial nerve 6-8
action: elbow- extension; shoulder- extension, adduction

19
Q

TRICEPS LATERAL

A

origin: posterior humeral proximal radial groove
insertion: olecranon process
innervation: radial nerve (6-8)
action: elbow- extension; shoulder: extension and adduction

20
Q

TRICEPS MEDIAL

A

origin: posterior humerus inferior radial groove
insertion: olecranon process
innervation: radial nerve (6-8)
action: elbow- extension; shoulder: extension, adduction

21
Q

ANCONEUS

A

origin: lateral epicondyle of humerus
insertion: olecranon of ulna (radial surface)
innervation: radial nerve (6-8)
action: extends the elbow and tightens the joint

22
Q

SUPRASPINATUS

A

Origin: Supraspinatus fossa
Insertion: greater tubercle of superior facet
Innervation: Suprascapular N (C4-C6)
Action: Abduction (first 15 degrees)

Gross Anatomy (7 decks)

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