Muscles of the Neck Flashcards Preview

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Flashcards in Muscles of the Neck Deck (15):
1

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Sternocleidomastoid

 

Origin: Manubrium of sternum and medial portion of clavicle

Insertion: Mastoid process of temporal bone and superior nuchal line of occipital bone

 

Both sides: Flexes head (nod down)

One side: Laterally rotates head to opposite side

2

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Mylohyoid

 

Elevates hyoid bone and floor of mouth

3

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Sternohyoid

 

Depresses larynx and hyoid bone if mandible is flexed

4

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Sternothyroid

 

Pulls larynx and hyoid bone inferiorly

5

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Splenius

 

Bilaterally extends the head, unilaterally rotates and bends laterally toward the same side

6

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Trapezius

 

Origin: occipital bone, ligamentum nuchae (nuchal ligament), and spines of C7 and all thoracic vertebrae

Insertion: Acromion and spine of scapula, lateral third of clavicle

 

Stabilizes, raises, retracts, and rotates scapula

7

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Stylohyoid

 

Elevates and retracts hyoid

8

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Omohyoid

 

Depresses and retracts hyoid

9

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Genioglossus

 

Primarily protracts tongue

10

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Erector spinae

 

Extend and laterally flex the vertebral column

11

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Digastric

 

Open mouth and depress mandible

12

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Geniohyoid

 

Pulls hyoid bone superiorly and anteriorly

13

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Thyrohyoid

 

Depresses hyoid bone or elevates larynx if hyoid is fixed

14

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Scalenes

 

Elevate first two ribs (for breathing)

15

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Semispinalis

 

Extends vertebral column and head and rotates them to opposite sides