10 Questions
What is the frequency of facial nerve paralysis among cranial nerve dysfunction?
Second in frequency
What is the classification of facial nerve paralysis based on?
Degree, nature of onset, and causation
Why is a thorough medical history important in establishing the differential diagnoses of facial paralysis?
To rule out systemic diseases
What is included in the ear examination during the diagnosis of facial paralysis?
Assessment of the middle ear and external ear canal
What is the purpose of a detailed cranial nerve examination during the diagnosis of facial paralysis?
To rule out cranial polyneuropathy
What is a potential consequence of incomplete eyelid closure due to facial nerve paralysis?
Exposure keratitis and eventual ulceration
Which part of the brain receives bilateral cortical innervation and is related to the facial nerve nucleus?
Voluntary motor cortex
What is the name of the first branch of the facial nerve that carries preganglionic parasympathetic fibers destined for the lacrimal gland and the glands within the nasal and palatal mucosa?
Greater superficial petrosal nerve
What is the length of the meatal/canalicular segment of the facial nerve?
8 to 10 mm
What is a possible cause of acute onset of facial paralysis without any other symptoms?
Idiopathic facial paralysis (Bell's palsy)
Test your knowledge of facial nerve paralysis, a symptom or sign of cranial nerve dysfunction, including its causes, classification, and diagnosis. Learn about idiopathic and secondary forms of paralysis, and its relation to medical history and physical examination.
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