Shoulder Flashcards by Rafi Ahmed

List the extrinsic superficial muscles of the shoulder

Trapezius

Latissimus dorsi

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Trapezius is composed of 3 parts - descending, transverse and ascending. What is the origin + insertion of descending trapezius?

Spinous processes of C1-C7

Lateral 1/3 of clavicle

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Trapezius is composed of 3 parts - descending, transverse and ascending. What is the origin + insertion of transverse trapezius?

Spinous processes of T1-T4

Medial aspect of acromion

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Trapezius is composed of 3 parts - descending, transverse and ascending. What is the origin + insertion of ascending trapezius?

Spinous processes of T5-T12

Scapular spine

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What is the nerve + arterial supply to trapezius?

Spinal accessory nerve

Superficial cervical artery

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What is the origin + insertion of latissimus dorsi?

Spinous processes of T7-L5/inferior angle of scapula

Lesser tuberosity of humerus

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What is the nerve + arterial supply to latissimus dorsi?

Thoracodorsal nerve

Branch of subscapular artery

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Which movements does latissimus dorsi enable?

Arm: adduction, extension, internal rotation

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List the extrinsic deep muscles of the shoulder

Levator scapulae
Rhomboid major
Rhomboid minor

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What is the origin + insertion of levator scapulae?

Spinous processes of C1-C4

Medial border of scapula

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What is the nerve + arterial supply to levator scapulae?

Dorsal scapular nerve

Dorsal scapular artery

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What is the origin + insertion of rhomboid minor?

Spinous process of C7-T1

Medial border of scapula

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What is the nerve + arterial supply to rhomboid minor?

Dorsal scapular nerve

Transverse cervical artery

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What is the origin + insertion of rhomboid major?

Spinous processes of T2-T5

Medial border of scapula

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What is the nerve + arterial supply to rhomboid major?

Dorsal scapular nerve

Dorsal scapular artery

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List the intrinsic muscles of the shoulder

Deltoid
Supraspinatus
Infraspinatus
Subscapularis
Teres minor

What is the origin + insertion of deltoid?

Acromion/lateral clavicle

Deltoid tuberosity of humerus

What is the nerve supply to deltoid?

Axillary nerve

Which movements does deltoid enable?

Shoulder: abduction, flexion, extension

What is the origin + insertion of supraspinatus?

Supraspinatus fossa of scapula

Greater tubercle of humerus

What is the nerve supply to supraspinatus?

Suprascapular nerve

Which movements does supraspinatus enable?

Arm: abduction

What is the origin + insertion of infraspinatus?

Infraspinatus fossa of scapula

Greater tubercle of humerus

What is the nerve supply to infraspinatus?

Suprascapular nerve

Which movements does infraspinatus enable?

Arm: external rotation

What is the origin + insertion of subscapularis?

Subscapular fossa of scapula | Lesser tubercle of humerus

What is the nerve supply to subscapularis?

Subscapular nerve

Which movements does subscapularis enable?

Arm: internal rotation

What is the origin + insertion of teres minor?

Lateral border of scapula | Greater tubercle of humerus

What is the nerve supply to teres minor?

Axillary nerve

Which movements does teres minor enable?

Arm: external rotation