Muscles Of Thorax, Head & Neck Flashcards by Maura Downey

Name the extra-ocular muscles

1) superior oblique
2) superior rectus
3) inferior rectus
4) lateral rectus
5) medial rectus
6) inferior oblique
7) levator palpebrae superioris

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What extraocular muscles does CN III innervate & name branch

1) Superior ramus: 
	superior rectus 
	levator palpebrae superioris
2) inferior ramus:
	inferior rectus
	medial rectus
	inferior oblique

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What extraocular muscles does CN IV innervate?

Trochlear nerve: superior oblique muscle

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What extraocular nerve does CN VI innervate?

Abducens: lateral rectus

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Elevates eye

1) superior rectus

2) inferior oblique

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Abducts eye

1) lateral rectus
2) inferior oblique
3) superior oblique
4) superior rectus

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Adduct eye

1) medial rectus

2) inferior rectus

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Depress eye

1) superior oblique

2) inferior rectus

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Intorsion (inward rotation)

1) superior rectus

2) superior oblique

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Extortion (outward rotation)

1) Inferior oblique

2) inferior rectus

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List the suboccipital neck muscles:

Superior oblique
Inferior oblique
Rectus capitus posterior minor
Rectus capitus posterior major

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What is the innervation for the suboccipital neck muscles

All are Innervated by the suboccipital nerve, which the spinal nerve is C1 (dorsal ramus)

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What is the attachment for superior oblique (suboccipital muscle)

Transverse process of C1 to the area between the superior & inferior nuchal line

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What are the attachments for the inferior oblique muscle (suboccipital)

Spinous process of C2 to the transverse processes of C1

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What are the attachments for the rectus capitus posterior minor muscle?

Tubercle on posterior arch of C1 to the medial aspect of the inferior nuchal line

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What are the attachments for the rectus capitus posterior major?

Spinous process of C2 to the lateral aspect of inferior nuchal line

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List the muscles of mastication

Temporalis
Masseter
Lateral pterygoid
Medial pterygoid

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What is the innervation for masseter muscle

CN V (Trigeminal)
V3 mandibular
Masseteric branch

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What is the innervation for temporalis?

CN V (Trigeminal)
V3 mandibular
Deep temporal branch

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What is the innervation for lateral pterygoid muscle

CN V (Trigeminal)
V3 Mandibular
Lateral pterygoid branch

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What is the innervation for medial pterygoid?

CN V (Trigeminal)
V3 mandibular
Medial pterygoid branch

What is action for masseter muscle

Elevate, protract, retract mandible

What is action for temporalis muscle

Elevate and retract mandible

What is action for lateral pterygoid muscle

Side to side motion, depress and protract mandible

What is the action for medial pterygoid muscle

Side to side motion, elevate mandible

What are the attachments for the masseter muscle

Zygomatic arch to the angle of mandible and lateral aspect of ramus

What are the attachments for temporalis muscle

Temporal fossa to Coracoid process and anterior border of mandible

What are the attachments for the lateral pterygoid

Infratemporal surface of sphenoid and lateral surface of lateral pterygoid plate to the neck of the mandible and TMJ disk

What are the attachments for the medial pterygoid muscle

Medial surface of lateral pterygoid plate & adjacent maxilla to the medial spect of the angle of mandible

List the muscles of facial expression:

``` Orbicularis oculi Levator labiii superioris Zygomaticus major/minor Orbicularis oris Buccinator Depressor labii inferioris Depressor anguli oris Frontalis Platysma Nasalis ```

What is innervation of orbicularis oculi

CN VII: facial nerve | Temporal & zygomatic branches

What is innervation for frontalis muscle

CN VII facial nerve | Deep temporal branch

What is the innervation for buccinator?

CN VII facial | Buccal branch

What is innervation for levator labii superioris?

CN VII Facial Zygomatic Buccal

What is innervation for depressor anguli oris?

CN VII Facial | Buccal and mandibular branches

What is the innervation for nasalis muscle

CN VII Facial | Buccal branch

What is the innervation for platysma?

CN VII Facial | Cervical branch

What is the innervation for depressor labii inferioris

CN VII | Mandibular branch

What is the innervation for Zygomaticus major/minor?

CN VII | Zygomatic and Buccal branches

What is the innervation for orbicularis oris muscle?

CN VII Facial | Buccal and mandibular branches

What is the action for orbicularis oculi?

Close eye/wink

What is action for frontalis?

Elevate eyebrows, protract scalp

What is action for levator labii superioris?

Raise & evert upper lip (shows sadness)

What is the action for orbicularis oris?

Close/purse lips

What is action for Zygomaticus major/minor

Raise corners of mouth (smile)

What is action of depressor anguli oris?

Laterally depress sides of mouth (frown, sadness)

What is action of depressor labii inferioris

Depress lower lip, pout

What is action of buccinator?

Compress cheeks when blowing

What is action of platysma

Elevate anterior nuchal skin (shows stress)

What is action of nasalis

Compress/widen nasals