Neuroanatomy: Orientation to face, Flashcards Preview

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Flashcards in Neuroanatomy: Orientation to face, Deck (12)
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1
Q

What does each of these do? What are they innervated by?

  • Orbicularis Oculi
  • Orbicularis Oris
  • Buccinator
  • Platysma
A
  1. Orbicularis Oculi - Shuts eyes
  2. Buccinator - Blowing out
  3. Orbicularis Oris - Lip muscle (puckers lips)
  4. Platysma - did not explain in class

These are all innervated by the Facial Nerve CN VII

2
Q

What is the parotid gland and duct? Where do they drain into?

What nerve innervates them? What are all of it’s branches?

A

The parotid gland sits on the side of the cheek and drains into the buccal fat pad via the parotid duct.

The parotid gland is innervated by the Facial Nerve (CN VII).

It makes 5 branches that go into the rest of the facial muscles

  1. Temporal
  2. Zygomatic
  3. Buccal
  4. Marginal mandibular
  5. Cervical
3
Q

What innervates the Masseter muscle?

What innervates the Temporalis muscle?

A

The mandibular division of the Trigeminal nerve (V3)

  • This is a motor nerve
  • It also supplies the temporalis muscle
4
Q

What nerves go through the following:

  • Supraorbital foramen
  • Infraorbital foramen
  • Mental foramen

What supplies the Angle of the mandible? What is the clinical significance of this?

A

Each of the foramen’s has a sensory branch of the trigeminal nerve coming out of it:

  • Supraorbital foramen: V1 (Opthalmic)
  • Ifraorbital foramen: V2 (Maxillary)
  • Mental foramen: V3 (Mandibular

C2 from the cervical nerves innervates the angle of the madible and is important because that will hurt when there is a heart attack

5
Q

What is the Angle of the mandible supplied by? Why is it important?

A

C2 supplies it and it is felt during a herat attack!

6
Q

What artery and and veins supply the face?

What are they extensions of?

What is the clinical significance of the vein?

A

The facial vein and the facial artery

The Facial vein drains into the Internal Jugular Vein

The Facial Artery is an extension of the External Carotid Artery

  • They can be felt just at the bottom of the chin before the masseter muscle.
  • The facial vein is a valvless vein so blood can move in any direction.

Clinical significance: If you have an infection in the facial vein, you can get a thrombosis in the dural sinus –> blood is backed up in the entire brain!

7
Q

Where is the parotid gland?

Where does the facial nerve come out of?

A

Inside the upper cheek in your mouth

  • The facial nerve (CN VII) leaves through the stylomastoid foramen

Then it moves throught the parotid gland, splitting the gland into a superior and inferior portion

8
Q

What nerve innervates the muscles of mastication (masseter, Lateral Pterygoid, temporalis, etc.)

A

The mandibular branch of the trigeminal (V3)

9
Q

Identify the Lateral pterygoid muscle

Where does it insert?

A

It inserts in the TMJ and neck of the condylar process

10
Q

What nerve goes through the Mandibular Foramen?

What does this nerve do?

Locate the mandibular foramen and lingula

A

The Inferior Alveolar nerve and vessels come through the mandibular foramen

  • It is a branch of V3
  • This is a sensory nerve for the teeth of the mandible
  • This is also a sensory for the lower lip (it leaves through the mental foramen
11
Q

Locate the Inferior Alveolar Nerve, Lingual Nerve, and Mylohyoid Nerve

A
12
Q
A