Cranial Nerve Clinical Flashcards
What are the infections that affecting the olfactory nerve
-mucormycosis (black fungus)
-naegleria fowleri
Defect of CN I leads to
-anosmia
What is the important artery passes and piercing the optic nerve
-opthalamic artery
-it unites with central retinal artery
In MS, what condition arises associated from optic nerve
-optic neuritis
What is the main causes of CRAO
-embolic
-thrombotic
What is the main symptom of CRAO
-acute unilateral visual loss
-visual loss due to decrease visual acuity
What is the complication of uncal herniation on CNIII
-CN III palsy
What is the symptoms of CN III palsy based on:
-eyelid
-pupils
-eye movement
-ptosis
-mydriasis
-downward and laterally (SO4, LR6)
What are the arteries that will lead to CN III palsy if aneurysm occurs
-posterior cerebral artery (PCA)
-superior cerebellar artery
-posterior communicating artery
What is the symptoms of CN IV palsy based on eye movement
-upward and medially
SO main function is to depress and to abduct (laterally)
What is the symptoms of CN V palsy based on motor and sensory
-inability to open the jaw against resistance
-difficulty of chewing and biting
-no jaw reflex
-no corneal reflex
-no facial sensation
What is the character of trigeminal neuralgia
-spontaneous sharp stabbing pain
-with electrical shock sensation
In case of increase ICP, what cranial be affected most and why
-CN VI
-because it passes through the subarachnoid space
What is the main symptom of the CN VI palsy
-medium strabismus
(inability to look laterally)
What is Bell Palsy
-syndromes that occur due to LMN lesion of CN VII that leads to ipsilateral muscle weakness
