11.03.2017 Views

DR Medhat MRCP

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• Facial nerve palsy :<br />

A. Causes of bilateral facial nerve palsy :<br />

1. Guillain-Barre syndrome.<br />

2. Sarcoidosis.<br />

3. Poliomyelitis ,lyme disease.<br />

B. Causes of unilateral facial nerve palsy :<br />

1. Cause of bilateral facial palsy +<br />

Stroke<br />

U.M.N.L<br />

L.M.N.L<br />

1. Bell`s palsy.<br />

2. Ramsay-Hunt syndrome (due to herpes zoster).<br />

3. Acoustic neuroma.<br />

4. Parotid tumours.<br />

5. HIV.<br />

6. DM.<br />

7. M.S<br />

C. Clinical picture of facial palsy :<br />

LMN vs. UMN<br />

- Upper motor neuron lesion 'spares' upper face i.e. Forehead.<br />

- Lower motor neuron lesion affects all facial muscles.<br />

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