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Anatomy > Superficial Back Muscles > Flashcards

Superficial Back Muscles Flashcards

1
Q

What is the origin of the trapezius?

A

Occipital bone, nuchal ligament, and spinous processes of C7-T12.

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2
Q

What is the insertion of the trapezius?

A

Spine of scapula, acromion, and clavicle.

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3
Q

What are the actions of the trapezius?

A

Superior fibers - Scapular elevation
Middle fibers - Scapular adduction
Inferior fibers - Scapular depression
All - fibers - Upward scapular rotation

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4
Q

What innervates the trapezius?

A

Spinal accessory nerve (CN-XI).

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5
Q

Where does the blood supply of the trapezius come from?

A

Superficial branch of transverse cervical artery.

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6
Q

What is the origin of the latissimus dorsi?

A

Spinous processes T7 to sacrum via thoracolumbar fascia.

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7
Q

What is the insertion of the latissimus dorsi?

A

Intertubercular groove of humerus.

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8
Q

What are the actions of the latissimus dorsi?

A

Adduction, extension, and medial rotation of the humerus at the glenohumeral joint.

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9
Q

What innervates the latissimus dorsi?

A

Thoracodorsal nerve (C6-C8)

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10
Q

What is the origin of the levator scapulae?

A

Transverse processes of upper cervical vertebrae.

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11
Q

What is the insertion of the the levator scapulae?

A

Superior angle of the scapula.

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12
Q

What are the actions of the levator scapulae?

A

Elevation and downward rotation of the scapula.

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13
Q

What innervates the levator scapulae?

A

Dorsal scapular nerve (C5).

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14
Q

What is the origin of the rhomboid major?

A

Spinous processes of T2-T5.

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15
Q

What is the origin of the rhomboid minor?

A

Spinous processes of C7-T1.

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16
Q

What is the insertion of the rhomboid major and minor?

A

Medial border of the scapula.

17
Q

What are the actions of the rhomboid major and minor?

A

Adduction of the scapula.

18
Q

What innervates the rhomboid major and minor?

A

Dorsal scapular nerve (C5).

19
Q

What are the superficial muscles of the back/upper limbs?

A

Trapezius, Latissimus Dorsi, Levator Scapulae, and Rhomboid Major/Minor.

20
Q

What innervates the superficial muscles of the back?

A

Ventral rami spinal nerves, with exception of the trapezius.

21
Q

What is the blood supply of the latissimus dorsi?

A

Thoracodorsal artery.

Anatomy (60 decks)

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