Muscles of facial expression

Question 1

What is Bells’ Palsy?

Answer 1

Sudden loss of movement on the right side of his face (can be caused if we inject the wrong area)

• Viral infection of the facial nerve
• Good recovery after a course of corticosteroids

Question 2

What is the structure of facial skin?

where are muscles of facial expressions found?

Answer 2

-The muscles of facial expression are found in the superficial fascia.

Question 3

what are the muscles labelled?

Answer 3

(Quadratus superioris- Group of four muscles sitting superior to the lips)

Question 4

What are the 4 Quadratus superioris muscles?

Answer 4

quadratus superioris:

1. zygomaticus major
2. zygomaticus minor
3. levator labii superioris
4. levator labii superioris

alaequae nasi

Question 5

What is the Modiolus?

What is the Buccinator attachement sites?

Answer 5

Modiolus-connective tissure area- common area of many muscle insertion.

Buccinator attachement sites- anteriorly attaches to orbicularis oris and posteriorls attaches to pterygomandibular raphe.

Question 6

What are the 2 parts to the orbicularis oculi?

Answer 6

• 2 parts:
• orbital (external) the part responble for srunching your eyes up tightly
• palpebral (internal / eyelid) is about gental closing of eye, i.e blink

Question 7

What is the 5 layers of the SCALP?

Answer 7

• 5 layers of the scalp:
• S - Skin
• C - Connective tissue
• A - Aponeurosis
• L - Loose connective tissue
• P - Pericranium

Question 8

What are all the muscles of facial expression inervated by?

Answer 8

-All muscles of facial expression innervated by the Facial Nerve (CN VII)

Question 9

How to Clinically test motor function of CN VII?

Answer 9

• Clinically test motor function of CN VII:
• ask patient to frown
• ask patient to close eyes tightly
• ask patient to smile
• ask patient to puff out cheeks

Question 10

What are the 6 branches of the facial nerve?

Answer 10

6 branches:

Posterior auricular

Temporal

Zygomatic

Buccal

Mandibular

Cervical

Question 11

Trick to on how to know difference between vein and artery?

Answer 11

Vein has a very straight course where as artery has a very wiggley course.

Question 12

What are the sensory nerve supplies to the face

CN V3/c

CN V2/b

CN V1/a

Answer 12

Opthalmic- Bridge of nose down to tip and upper eyelids

Maxillary- side of nose and upper lip ,lower eyelids

Mandibular- lower lip, chin, mandible