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Anatomy - HSC501 > Scapulohumeral Muscles > Flashcards

Scapulohumeral Muscles Flashcards

1
Q

Deltoid - Origin

A

Lateral third of clavicle

Acromion and spine of scapulae

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2
Q

Deltoid - Insertion

A

Deltoid tuberosity of humerus

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3
Q

Deltoid - Innervation

A

Axillary nerve (C5, C6)

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4
Q

Deltoid - Action(s)

A

Clavicular (anterior) part – flexes and medially rotates shoulder joint
Acromial (middle) part – abducts shoulder joint
Spinal (posterior) part – extends and laterally rotates shoulder joint

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5
Q

Supraspinatus - Origin

A

Supraspinous fossa of scapula

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6
Q

Supraspinatus - Insertion

A

Superior facet of greater tubercle of humerus

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7
Q

Supraspinatus - Innervation

A

Suprascapular nerve (C4, C5, C6)

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8
Q

Supraspinatus - Action(s)

A

Initiates and assists deltoid in abduction of shoulder joint and acts with other rotator cuff muscles

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9
Q

Infraspinatus - Origin

A

Infraspinous fossa of scapula

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10
Q

Infraspinatus - Insertion

A

Middle facet of greater tubercle of hunerus

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11
Q

Infraspinatus - Innervation

A

Suprascapular nerve (C5, C6)

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12
Q

Infraspinatus - Action(s)

A

Laterally rotate shoulder joint

Help hold humeral head in glenoid cavity

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13
Q

Teres Minor - Origin

A

Middle part of lateral border of scapula

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14
Q

Teres Minor - Insertion

A

Inferior facet of greater tubercle of humerus

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15
Q

Teres Minor - Innervation

A

Axillary nerve (C5, C6)

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16
Q

Teres Minor - Action(s)

A

Laterally rotate shoulder joint

Help hold humeral head in glenoid cavity

17
Q

Teres Major - Origin

A

Inferior part of lateral border of scapula and posterior surface of inferior angle of scapula

18
Q

Teres Major - Insertion

A

Medial lip of intertubercular sulcus of humerus

19
Q

Teres Major - Innervation

A

Lower subscapular nerve (C5, C6)

20
Q

Teres Major - Action(s)

A

Adducts medially rotates shoulder joint

21
Q

Subscapularis - Origin

A

Subscapular fossa of scapula

22
Q

Subscapularis - Insertion

A

Lesser tubercle oh humerus

23
Q

Subscapularis - Innervation

A

Upper and lower subscapular nerves (C5, C6, C7)

24
Q

Subscapularis - Action(s)

A

Medially rotates and adducts shoulder joint

Helps hold head of humeral head in glenoid cavity

Anatomy - HSC501 (18 decks)

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