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CHA 101 > Lab XIV > Flashcards

Lab XIV Flashcards

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1
Q

How many nerves of facial expression are there?

A

23

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2
Q

What is responsible for soft closure of the eye?

A

palprebral part of the orbicularis oculi

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3
Q

orbicularis oculi

A

palpebral part: on the eyelid, soft closure
orbital part: around the eyelid, hard closure

innervation: CN VII

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4
Q

orbicularis oris

A

closes the lips

innervation: CN VII

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5
Q

buccinator

A
  • keeps food in between teeth
  • pulls the angle of the mouth posteriorly
  • keeps cheeks away from teeth when chewing
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6
Q

depressor anguli oris

A
  • depresses the angle of the mouth (frown)

- CN VII

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7
Q

zygomaticus major

A
  • elevates the angle of the mouth (smile)

- CN VII

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8
Q

platysma

A
  • elevates and wrinkles the skin of the anterolateral neck
  • depresses the mandible
  • broad and large like a platypus tail
  • CN VII
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9
Q

What are the muscles of mastication?

A
  1. masseter muscle
  2. temporalis muscle
  3. medial pterygoid muscle
  4. lateral pterygoid muscle
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10
Q

What are the motor branches of the facial nerve?

A

a. temporal branches
b. zygomatic branches
c. buccal branches
d. mandibular branches
e. cervical branches

  • Two zebras bit my coccyx
  • all travel thru and arise from the parotid gland
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11
Q

What are the branches of CN V in the face?

A

a. supraorbital nerve (V1)
b. infraorbital nerve (V2)
c. mental nerve (V3)

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12
Q

parotid gland

A
  • largest salivary gland
  • superficial to lower part of masseter muscle
  • innervated by parasympathetic CN IX
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13
Q

parotid duct

A

comes from the gland thru the buccinator muscle, opens in mouth opposite the upper second molar

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14
Q

lacrimal gland

A

lateral side of orbit

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15
Q

trapezius

A

o: occipital bone, the ligamentum nuchae, and the spinous processes of T01–T12
i: lateral third of the clavicle, as well as the acromion and scapular spine of the scapula
a: elevates, depresses, rotates, and retracts the scapula
n: CN XI

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16
Q

sternocleidomastoid

A

O: Sternal head-superior part of anterior surface of manubrium sterni
Clavicular head- superior surface of medial third of the clavicle
I: Lateral surface of mastoid process of the temporal bone, Lateral half of superior nuchal line of the occipital bone
A: Unilateral contraction: cervical spine: neck ipsilateral flexion, neck contralateral rotation
Bilateral contraction: atlantooccipital joint/ superior cervical spine: head/neck extension; Inferior cervical vertebrae: neck flexion; sternoclavicular joint: elevation of clavicle and manubrium of sternum
N: Accessory nerve (CN XI), branches of cervical plexus (C2-C3)

[accessory muscle of respiration]

17
Q

omohyoid

A 
O: scapula 
I: hyoid bone
A: swallowing, coughing sneezing, Valsalva maneuver 
N: ansa cervicalis (C1-C3)
-most superficial 
-2 bellies 
-strap muscle
18
Q

thyrohyoid

A 
O: hyoid 
I: thyroid cartilage 
A: swallowing, coughing sneezing, Valsalva maneuver 
N: ansa cervicalis (C1-C3)
-strap muscle 
-deep
19
Q

sternohyoid

A 
O: hyoid bone  
I: manubrium 
A: swallowing, coughing sneezing, Valsalva maneuver 
N: ansa cervicalis (C1-C3)
-strap muscle
20
Q

sternothyroid

A 
O: thyroid cartilage (lil butterfly) 
I: manubrium 
A: swallowing, coughing sneezing, Valsalva maneuver 
N: ansa cervicalis (C1-C3)
-strap muscle
21
Q

mylohyoid

A 
suprahyoid muscle 
O: hyoid bone 
I: mandible 
A: elevates hyoid 
N: mandibular division of trigeminal (V3)
22
Q

scalene muscles

A

anterior, middle, and posterior (middle and posterior often fused together)
O: transverse processes of the cervical vertebrae
I: 1st and 2nd ribs
A: tilt neck laterally or elevate ribs
N: cervical spinal nerves
-accessory muscles of respiration
-roots of the brachial plexus pass btwn anterior and middle scalene muscles to get to upper limb

23
Q

what runs with the anterior scalene muscle?

A

-phrenic nerve, runs with internal jugular vein btwn subclavian vein and artery

24
Q

what innervates all of the muscles of the larynx (except the cricothyroid)?

A

the recurrent laryngeal nerve

  • wraps around arch of aorta on L
  • wraps around subclavian a on R
25
Q

superior thyroid artery

A
  • arises from the external carotid a

- supplies the thyroid gland and larynx

26
Q

lingual artery

A
  • emerges from superior thyroid artery
  • passes deep to hyoglossus muscle
  • supplies the tongue and floor of the mouth
27
Q

facial artery

A
  • emerges above the lingual artery
  • supplies the face
  • palpate pulse anterior to where masseter inserts into mandible
28
Q

maxillary artery

A
  • arises from the external carotid artery deep to the ramus of the mandible and travels anteriorly
  • either superficial or deep to the medial pterygoid muscle
  • supplies muscles of mastication, posterior nasal cavity, palate, face below orbit
  • middle meningeal artery (thru foramen spinosum)
29
Q

superficial temporal artery

A
  • most superior branch of the external carotid artery

- pulse anterior to ear

CHA 101 (14 decks)

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