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Anatomy of Cranial Nerves

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Questions and Answers

Which muscle is responsible for closing the eyelid?

Stapedius muscle

Orbicularis oculi muscle (correct)

Buccal muscle

Zygomatic muscle

What is the function of the facial nerve branch that pierces the parotid gland?

Regulates saliva production

Supplies muscles of facial expression (correct)

Carries taste sensations from the tongue

Innervates the parotid gland

What is the clinical relevance of a patient presenting with paralysis to oral muscles due to facial nerve dysfunction?

Difficulty swallowing

Difficulty eating, food collecting between teeth and cheeks (correct)

Drooping upper eyelid

Loss of taste sensation

Which cranial nerve branch is responsible for carrying taste sensations from the anterior 2/3 of the tongue?

Chorda tympani nerve branch Signup and view all the answers

What is the function of the stapedius muscle?

Moves the stapes bone in the middle ear Signup and view all the answers

Which nerve branch exits the skull through the stylomastoid foramen?

Facial nerve proper branch Signup and view all the answers

What is the action of the aponeurosis in the scalp?

To raise the eyebrows and pull down the forehead Signup and view all the answers

What is the clinical relevance of the scalp in terms of infections and malignant lesions?

It is a pathway for the spread of infections and malignant lesions to the face and neck Signup and view all the answers

What is the function of the facial nerve (CN VII) in facial expression?

It innervates the muscles of facial expression Signup and view all the answers

What are the components of the scalp?

Skin, connective tissue, aponeurosis, loose areolar tissue, and pericranium Signup and view all the answers

What is the significance of the scalp being rich in blood vessels?

It makes scalp wounds appear worse than they are Signup and view all the answers

What is the recommended reading for the study of the face and scalp?

Moore's Clinically Oriented Anatomy (8th Edition), pages 851-872 Signup and view all the answers

Which facial muscle is responsible for flaring the nostrils during anger or exertion?

Nasalis Signup and view all the answers

What is the name of the muscle that draws the angle of the mouth backwards?

Risorius Signup and view all the answers

Which cranial nerve supplies the motor innervation to the facial muscles?

CN VII (facial) Signup and view all the answers

What is the name of the segment of the facial nerve that passes through the middle ear?

Tympanic segment Signup and view all the answers

Which of the following muscles is involved in the 'staring' or 'astonished' look in progressive supranuclear palsy?

Corrugator supercillii Signup and view all the answers

What is the name of the branch of the facial nerve that supplies the lacrimal gland?

Greater Petrosal branch Signup and view all the answers