Suprahyoid & Infrahyoid Muscles (Ant. Neck) Flashcards

1
Q

Origin of stylohyoid

A

Styloid process of temporal bone

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2
Q

Insertion of stylohyoid

A

Lateral aspect of hyoid

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3
Q

Innervation of stylohyoid

A

Styloid branch of facial nerve (CN:7)

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4
Q

Action of stylohyoid

A

Initiates swallowing (pulls hyoid posterior and superior)

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5
Q

Origin of anterior belly of digastric muscle

A

Digastric fossa of mandible

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6
Q

Origin of posterior belly of digastric muscle

A

Mastoid process of temporal bone

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7
Q

Insertion of anterior and posterior digastric muscle

A

Both connected by intermediate tendon, to hyoid bone via fibrous sling

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8
Q

Innervation of anterior belly of digastric

A

Inferior alveolar nerve

> branch of mandibular nerve

> > derived from trigeminal nerve (CN:5)

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9
Q

Innervation of posterior digastric muscle

A

Digastric branch of facial nerve (CN:7)

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10
Q

Origin of mylohyoid

A

Mylohyoid line of mandible

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11
Q

Insertion of mylohyoid

A

Hyoid

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12
Q

Innervation of mylohyoid

A

Inferior alveolar

> branch of mandibular nerve

> > derived from trigeminal nerve

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13
Q

Origin of geniohyoid

A

Inferior mental spine of mandible

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14
Q

Insertion of geniohyoid

A

Hyoid bone

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15
Q

Innervation of hyoid bone

A

C1 that runs with Hypoglossal (CN:12)

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16
Q

What are the 2 planes of infrahyoid muslces

A

Superficial plane - omohyoid and sternohyoid

Deep plane - sternothyroid and thyrohyoid

[DEEP SO CLOSER TO THYROID]

17
Q

Origin of inferior belly of omohyoid

A

Scapula

Goes superomedially under sternocleidomastoid

18
Q

Insertion of inferior belly of omohyoid

A

Superior belly of omohyoid by intermediate tendon (anchored to clavicle)

19
Q

Insertion of superior belly of omohyoid muscle

A

Hyoid

20
Q

Innervation of omohyoid muscle

A

Ansa cervicalis (Anterior rami of C1-C3)

21
Q

Origin of sternohyoid

A

Sternum and sternoclavicular joint

22
Q

Insertion of sternohyoid

A

Hyoid

23
Q

Innervation of sternohyoid

A

Ansa cervicalis (anterior rami of C1-C3)

24
Q

Origin of sternothyroid

A

Manubrium

25
Q

Insertion of sternothyroid

A

Thyroid cartilage

26
Q

Innervation of sternothyroid

A

Ansa cervicalis (anterior rami of C1-C3)

27
Q

Origin of thyrohyoid

A

Thyroid cartilage of larynx

28
Q

Insertion of thyrohyoid

A

Hyoid

29
Q

Innervation of thyrohyoid

A

Anterior rami of C1, with hypoglossal nerve (CN:12)