Scapulohumeral Muscles Flashcards by Ben Holtom | Brainscape

Q

Scapulohumeral Muscles

A

Rotator Cuff:

Subscapularis
Supraspinatus
Infraspinatus
Teres Minor

Others:

Teres Major
Deltoid
Triceps Brachii

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Q

Subscapularis origin

A

Subscapular Fossa of Scapula

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Q

Subscapularis insertion

A

Lesser tubercle of the humerus

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Q

Subscapularis innervation

A

Upper and Lower Subscapular Nerve

branches of the post. cord of BP

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Q

Subscapularis arterial supply

A

subscapular artery

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Q

Supraspinatus origin

A

supraspinous fossa of scapula

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Q

Supraspinatus insertion

A

greater tubercle of humerus; superior facet

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Q

Supraspinatus innervation

A

Suprascapular nerve

(upper trunk of BP)
through suprascapular notch
deep to supra / infraspinatus

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Q

Supraspinatus arterial supply

A

Suprascapular artery

“above” suprascapular notch
deep to supra / infraspinatus

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Q

Infraspinatus origin

A

infraspinous fossa of scapula

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Q

Infraspinatus insertion

A

greater tubercle of humerus; middle facet

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Q

Infraspinatus innervation

A

Suprascapular nerve

(upper trunk of BP)
through suprascapular notch
deep to supra / infraspinatus

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Q

Infraspinatus arterial supply

A

Suprascapular artery

“above” suprascapular notch
deep to supra / infraspinatus

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Q

Teres minor origin

A

lateral border of scapula; superior portion

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Q

Teres minor insertion

A

Greater tubercle of humerus; inferior facet

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Q

Teres minor innervation

A

Axiallary nerve

posterior chord of BP
travels with posterior humeral artery
found in quadrangular space
dumps into deltoid

Q

Teres minor arterial supply

A

Posterior humeral circumflex artery

branch of the axillary artery
travels with axillary nerve
found in quadrangular space
dumps into deltoid

Q

Supraspinatus action

A

abduction

Q

Infraspinatus action

A

external rotation arm

Q

teres minor action

A

external rotation and adduction of arm

Q

Deltiod origin

A

Lateral third of clavicle
acromion of scapula
spine of scapula

Q

Deltoid insertion

A

deltoid tuberosity of humerus

Q

deltoid innervation

A

axillary nerve

also innervates teres minor
travels with posterior humeral circumflex artery

Q

deltoid arterial supply

A

posterior circumflex humeral artery

branch of the axillary artery
travels with axillary nerve
found in quadrangular space

Q

Teres major origin

A

posterior surface of inferior angle of scapula

Q

Teres major insertion

A

medial lip of intertubercular grove of humerus

Q

Teres major innervation

A

lower subscapular nerve

also innervates subscapularis

Q

Teres major action

A

internal rotation
adduction
extension of arm