disorders of the cranial nerves Flashcards
parotid gland is supplied by what CN?
IX (glossopharyngeal)
submandibular and sublingual glands are supplied by which CN?
facial (VII)
what are 4 major parasympathetic autonomic functions (innervated by CNs)
pupillary constriction
lacrimation
salivation
vagal
brain lesion differential diagnosis may be… (2 examples)
stroke
myasthenia
optic neuritis
demyelination within the optic nerve
optic neuritis signs
pain on eye movement
reduced colour vision
reduced visual acuity
pupil dilatation is a …….. response
sympathetic
pupil constriction is a ……. response
parasympathetic
a fixed, dilated pupil is a sign of the palsy of what cranial nerve?
3rd
oculomotor
causes of dilated pupil
3rd nerve palsy
brain dead
cocaine
dim lighting
anxiety/ excitement
causes of constricted pupil
bright light
opiate overdose
horners syndrome
eye movement disorders can be caused by the palsy of what 3 nerves?
3rd
4th
6th
isolated 3rd nerve palsy can be due to
diabetes
hypertension
posterior communicating artery aneurysm
raised ICP
isolated 6th nerve palsy has numerous causes!
give some examples
idiopathic
diabetes
meningitis
raised intracranial pressure
trigeminal neuralgia is cause by a vascular loop that compresses the
5th cranial nerve
