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Clinical Anatomy 1 - Upper Extremity > Scapular Muscles > Flashcards

Scapular Muscles Flashcards

1
Q

Deltoid - Attachments

A

FROM
*the clavicle
*acromion
*spine of the scapula

TO
*the deltoid tuberosity of the humerus

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2
Q

Deltoid - Actions

A

*flexion & medial rotation (anterior), abduction (primarily middle), extension & lateral rotation, horizontal extension (posterior) of humerus

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3
Q

Deltoid - Innervations

A

axillary nerve
(C5-6; anterior, middle, & posterior portions)

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4
Q

Supraspinatus - Attachments

A

FROM
*the medial 2/3 of the supraspinous fossa

TO
*the superior facet of the greater tubercle of the humerus
*shoulder joint capsule

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5
Q

Supraspinatus - Actions

A

*initiates humeral abduction
*laterally rotates humerus
*stabilizes glenohumeral joint (reinforces superior aspect of joint capsule)

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6
Q

Supraspinatus - Innervations

A

suprascapular nerve
(C4-6)

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7
Q

Infraspinatus - Attachments

A

FROM
*the medial 2/3 of the infraspinous fossa

TO
*the middle facet of the greater tubercle of the humerus
*shoulder joint capsule

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8
Q

Infraspinatus - Actions

A

*lateral rotation of humerus
*stabilizes glenohumeral joint

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9
Q

Infraspinatus - Innervation

A

suprascapular nerve
(C5-6)

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10
Q

Teres minor - Attachment

A

FROM
*the upper 2/3 of the dorsal surface of the lateral border of the scapula

TO
*the inferior facet of the greater tubercle of the humerus
*shoulder joint capsule

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11
Q

Teres minor - Action

A

*lateral rotation of humerus
*stabilizes glenohumeral joint

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12
Q

Teres minor - Innervation

A

axillary nerve
(C5-6)

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13
Q

Subscapularis - Attachments

A

FROM
*the subscapular fossa

TO
*the lesser tubercle of the humerus

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14
Q

Subscapularis - Actions

A

*medial rotation of humerus
*stabilizes glenohumeral joint

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15
Q

Subscapularis - Innervation

A

upper & lower subscapular nerves
(C5-6)

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16
Q

Teres major - Attachments

A

FROM
*the dorsal surface of the inferior angle scapula
*lower 1/3 of the lateral border of the scapula

TO
*the medial lip of the intertubercular sulcus of the humerus

17
Q

Teres major - Actions

A

*humeral adduction, medial rotation, & extension

18
Q

Teres major - Innervation

A

lower subscapular nerve
(C5-6)

Clinical Anatomy 1 - Upper Extremity (11 decks)

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