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Upper Limb Muscles > Prevertebral > Flashcards

Prevertebral Flashcards

0
Q

What is the insertion of anterior scalene?

A

1st rib

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1
Q

What is the origin of anterior scalene?

A

Anterior tubercles of transverse processes of C3-C6

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2
Q

What innervates anterior scalene?

A

Cervical spinal nerves C4-C6

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3
Q

What is the action of anterior scalene?

A

laterally flex neck & elevates 1st rib during forced inspiration

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4
Q

What is the origin of levator scapulae?

A

Posterior tubercles of transverse processes of C1-C4

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5
Q

What is the insertion of levator scapulae?

A

Superior part of medial border of scapula

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6
Q

What innervates levator scapulae?

A

Dorsal scapular nerve C5 and cervical spinal nerves C3 & C4

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7
Q

What are the actions of levator scapulae?

A

Elevates scapula and tilts glenoid cavity inferiorly

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8
Q

What is the origin of middle scalene?

A

Posterior tubercles of transverse processes of C4-C7

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9
Q

What is the insertion of middle scalene?

A

Superior surface of 1st rib; posterior to groove for subclavian artery

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10
Q

What innervates middle scalene?

A

Anterior rami of cervical spinal nerves

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11
Q

What are the actions of middle scalene?

A

Laterally flex neck & elevates 1st rib during forced inspiration

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12
Q

What is the origin of posterior scalene?

A

Posterior tubercles of transverse processes of C4-C6

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13
Q

What is the insertion of posterior scalene?

A

External border of 2nd rib

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14
Q

What innervates posterior scalene?

A

Anterior rami of cervical spinal nerves C7 & C8

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15
Q

What is the action of posterior scalene?

A

Laterally flex neck & elevates 2nd rib during forced inspiration

16
Q

What is the origin of sternocleidomastoid?

A

Sternum: anterior surface of manubrium of sternum
Clavicle: superior surface of medial third of clavicle

17
Q

What is the insertion of sternocleidomastoid?

A

Lateral surface of mastoid process of temporal bone & lateral half of superior nuchal line

18
Q

What innervates sternocleidomastoid?

A

Spinal accessory nerve (CN XI) and C2 & C3 nerves

19
Q

What are the actions of sternocleidomastoid?

A

Unilateral contraction: tilts head to same side & contralaterally rotates
Bilateral: 1) extends neck at atlanto-occipital joint; 2) flexes cervical vertebrae so that chin approaches manubrium 3) protrusion

20
Q

What is the origin of omohyoid?

A

Superior border of scapula near suprascapular notch

21
Q

What is the insertion of omohyoid?

A

Inferior border of hyoid

22
Q

What innervates omohyoid?

A

C1-C3 by a branch of ansa cervicalis

23
Q

What are the actions of omohyoid?

A

Depresses, retracts & steadies hyoid

Upper Limb Muscles (8 decks)

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