Head and Neck Muscles

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Last updated 9:52 PM on 10/14/26

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24 Terms

1

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buccinator

Action: compresses cheeks

Origin: —

Insertion: —

Innervation: facial

2

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depressor anguli oris

Action: lowers corner of the mouth

Origin: —

Insertion: —

Innervation: facial

3

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depressor labii inferioris

Action: protrudes lower lip

Origin: —

Insertion: —

Innervation: facial

4

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frontalis

Action: raises eyebrows

Origin: epicranial aponeurosis

Insertion: skin of eyebrows

Innervation: facial

5

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levator labii superioris

Action: elevates upper lip

Origin: —

Insertion: —

Innervation: facial

6

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mentalis

Action: protrudes lower lip and chin

Origin: —

Insertion: —

Innervation: facial

7

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occipitalis

Action: pulls scalp posteriorly

Origin: occipital bone

Insertion: epicranial aponeurosis

Innervation: facial

8

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orbicularis oculi

Action: closes eye

Origin: —

Insertion: —

Innervation: facial

9

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orbicularis oris

Action: closes lips

Origin: —

Insertion: —

Innervation: facial

10

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platysma

Action: depresses mandible

Origin: —

Insertion: —

Innervation: facial

11

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risorius

Action: pulls mouth laterally

Origin: —

Insertion: —

Innervation: facial

12

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zygomaticus major

Action: raises upper lip laterally

Origin: zygomatic bone

Insertion: —

Innervation: facial

13

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zygomaticus minor

Action: raises upper lip laterally

Origin: zygomatic bone

Insertion: —

Innervation: facial

14

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masseter

Action: elevates mandible

Origin: zygomatic arch

Insertion: mandible

Innervation: —

15

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temporalis

Action: elevates mandible

Origin: lateral surface of skull

Insertion: mandible

Innervation: —

16

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digastric

Action: depresses mandible

Origin: —

Insertion: —

Innervation: —

17

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infrahyoid group

Action: depresses hyoid bone and larynx

Origin: —

Insertion: hyoid

Innervation: —

18

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suprahyoid group

Action: elevates hyoid and floor of mouth for swallowing

Origin: —

Insertion: hyoid

Innervation: —

19

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scalenes

Action: neck flexion

Origin: cervical vertebrae

Insertion: ribs 1 + 2

Innervation: —

20

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semispinalis capitis

Action: lateral flexion

Origin: —

Insertion: —

Innervation: —

21

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splenius capitis

Action: extends neck, rotates head to the same side

Origin: —

Insertion: —

Innervation: facial

22

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sternocleidomastoid

Action: flex head, rotates head to same side

Origin: sternum and clavicle

Insertion: mastoid process of temporal bone

Innervation: —

23

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trapezius

Action: extends neck

Origin: —

Insertion: —

Innervation: —

24

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erector spinae

Action: extends vertebral column

Origin: —

Insertion: —

Innervation: —