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Anatomy II > Anterior triangle of neck muscles > Flashcards

Anterior triangle of neck muscles Flashcards

1
Q

Name all 9 muscles of the anterior triangle of the neck.

A

sternocleidomastoid, digastric, stylohyoid, geniohyoid, mylohyoid, sternohyoid, sternothyroid, thyrohyoid, omohyoid

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2
Q

Name all 4 suprahyoid muscles.

A

stylohyoid, mylohyoid, geniohyoid, digastric

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3
Q

Name all 4 infrahyoid muscles.

A

sternohyoid, sternothyroid, omohyoid, thyrohyoid

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4
Q

What is the action of the sternocleidomastoid muscle?

A 
both heads (sternum and clavicle): flexion of cervical vertebral column
each head: rotation of head to opposite side
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5
Q

What is the action of the digastric muscle?

A

raises hyoid, depresses mandible

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6
Q

What is the action of the stylohyoid muscle?

A

raises and retracts hyoid

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7
Q

What is the action of the mylohyoid muscle?

A

raises hyoid and floor of mouth

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8
Q

What is the action of the geniohyoid muscle?

A

pulls hyoid anteriorly and superiorly

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9
Q

What is the action of the sternohyoid muscle?

A

depresses hyoid bone and larynx

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10
Q

What is the action of the sternothyroid muscle?

A

pulls thyroid cartilage

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11
Q

What is the action of the thyrohyoid muscle?

A

elevates thyroid cartilage, depresses hyoid bone

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12
Q

What is the action of the omohyoid muscle?

A

depresses and retracts hyoid bone

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13
Q

What is the innervation of the digastric muscle?

A

ant. fibers: trigeminal nerve

post. fibers: facial nerve

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14
Q

What is the innervation of the sternocleidomastoid muscle?

A

accessory (XI)

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15
Q

What is the innervation of the stylohyoid muscle?

A

facial nerve

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16
Q

What is the innervation of the mylohyoid muscle?

A

mandibular nerve

17
Q

What is the innervation of the geniohyoid muscle?

A

hypoglossal nerve, C1 spinal nerve

18
Q

What is the innervation of the sternohyoid muscle?

A

C1-C3 spinal nerves

19
Q

What is the innervation of the sternothyroid muscle?

A

C1-C3 spinal nerves

20
Q

What is the innervation of the thyrohyoid muscle?

A

hypoglossal, C1 spinal nerve

21
Q

What is the innervation of the omohyoid muscle?

A

C1-C3 spinal nerves

Anatomy II (12 decks)

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