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Head and Neck Anatomy > Anterior Triangle Muscles > Flashcards

Anterior Triangle Muscles Flashcards

1
Q

Digastric (ant. & post. bellies) origin

A

mastoid process

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2
Q

Digastric (ant. And post. bellies) insertion

A

digastric fossa

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3
Q

Digastric (ant. and post. bellies) innervation

A

Posterior = CN VII (facial)
Anterior = CN V (trigeminal)
**different CN bc they derive from differnt arches (mandibular and hyoid arch)

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4
Q

Digastric (ant. and post. bellies) action

A

Elevates hyoid; depresses mandible

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5
Q

All of the suprahyoid muscles have what action?

A

elevate the hyoid

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6
Q

Mylohyoid origin

A

Mylohyoid line inside of mandible

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7
Q

Mylohyoid insertion

A

midline raphe; hyoid

*big sheet of muscles that meets at midline and attaches along hyoid

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8
Q

Mylohyoid Innervation

A

CN V aka trigeminal

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9
Q

Mylohyoid Action

A

Elevates hyoid; elevates floor of oral cavity

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10
Q

Stylohyoid origin

A

Styloid process

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11
Q

Stylohyoid insertion

A

hyoid (splits around the sling of digastirc)

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12
Q

Stylohyoid innervation

A

CN VII aka facial nerve

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13
Q

Stylohyoid action

A

Elevates and retracts hyoid

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14
Q

Both Stylohyoid and _________ are next to each other? innervated by?

A

posterior belly of digastric

**CN VII aka facial nerve

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15
Q

mylohyod and _________ are innervatied by?

A

anterior belly of digastric

*CN V aka trigeminal

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16
Q

Geniohyoid origin

A

Genial tubercles on mandible

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17
Q

Geniohyoid insertion

18
Q

Geniohyoid innervation

A

C1 ventral rami

19
Q

Geniohyoid action

A

Elevates hyoid; Helps protrude tongue

20
Q

name the 4 suprhyoid muscles?

A

Digastric (ant. And post. bellies)
Mylohyoid
Stylohyoid
Geniohyoid

21
Q

Omohyoid (superior and inferior bellies) origin

22
Q

Omohyoid (superior & inferior bellies) insertion

A

superior scapula -goes deep to trapezius and inserts on scapula

23
Q

Omohyoid (superior & inferior bellies) innervation

A

ansa cervicalis

*part of the motor part of cervical plexus

24
Q

Omohyoid (superior and inferior bellies) action

A

Depresses the hyoid

25
Q

All infrehyoid muscles? This is opposite of?

A

infrahyoid muscles= depress hyoid

*opposite of suprahyoid muscles= elevate hyoid

26
Q

Sternohyoid is found next to?

A

next to superior belly of omhyoid

27
Q

Sternohyoid origin

A

Manubrium of sternum

28
Q

Sternohyoid insertion

29
Q

Sternohyoid innervation

A

ansa cervicalis

30
Q

Sternohyoid action

A

Depresses the hyoid

31
Q

Thyrohyoid origin

A

Thyroid cartilage

32
Q

Thyrohyoid insertion

33
Q

Thyrohyoid innervation

A

C1 ventral rami

34
Q

Thyrohyoid action

A

Depresses the hyoid

35
Q

Sternothyroid origin

A

Manubrium of Sternothyroid sternum

36
Q

Sternothyroid insertion

A

thyroid cartilage

37
Q

Sternothyroid action

A

Depresses the larynx*

38
Q

Sternothyroid innervation

A

ansa cervicalis

39
Q

What two muscles are innervated by C1 ventral rami?

A

Thyrohyoid and Geniohyoid

40
Q

Name the infrahyois Muscles?

A

Omohyoid (superior and inferior bellies)
Sternohyoid
Thyrohyoid
Sternothyroid

Head and Neck Anatomy (46 decks)

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