Cranial Nerves Flashcards
How may CNI be damaged?
Head injury
SOL
Frontal
How may CNII be damaged?
Optic neuritis
Ischaemia
Compression
Vit B12 def
What does CNII damage cause?
Monocular visual loss
RAPD
Papilloedema
What does CNIII palsy cause?
“Down and out” eye
Fixed dilated pupil
How may CNIII be damaged?
Raised ICP
Haemorrhage
Infarction
What does CNIV palsy cause?
Diplopia worse on looking down
How may CNV be damaged?
Brainstem lesion
Stroke
MS
What does CNV damaged cause?
Numbness and paraesthesia over face, tongue and buccal mucosa
How many CNVI be damaged?
MS
HTN
DM
What does CNVI damage cause?
Horizontal diplopia
What does CNVII damage cause?
Weakness in face
Loss of taste
How may CNVII be damaged?
Parotid tumour
What does CNVIII damage cause?
Sensorineural deafness
Tinnitus
Vertigo
Nystagmus
What does CNXI damage cause?
Impaired shoulder shrug and head rotation
How many CNXII be damaged?
Base of skull fracture
How does CNXII damage present?
impaired tongue movement
What causes Horner’s syndrome?
Unilateral sympathetic nerve lesion
Give causes of Horner’s syndrome
Pancoast tumour
Carotid dissection
What is Horner’s syndrome?
Meiosis
Ptosis
Enopthalmus
Facial anhidrosis
What is Bell’s palsy?
Acute onset unilateral LMN facial weakness
How does Bell’s palsy present?
Discomfort behind ipsilateral ear
Unilateral facial weakness
What is given in Bell’s palsy to increase recovery?
Oral pred
