Must-Knows Flashcards
Most common cerebellopontine angle (CPA) tumors
Acoustic neuroma
Meningioma
Lesion in frontal eye field vs seizure
Frontal eye field lesion: deviation towards lesion
Seizure: deviation to opposite
What does DWI enhances?
Stroke, abscess, epidermoid
EDH is associated with what? Crossing sutures and falx?
Associated with skull fracture (and pneumocephalus).
Don’t cross sutures. Can cross falx
Operative indication for EDH
Especially > 30 cc
Nonsurgical ok in 8GCS, no deficit (ALL requirements)
When to operate for compression fracture?
3 contiguous levels or wedge fracture
Where is the tegmen?
Tegmentum typamni - between cranial and tympanic cavities, thin bone
What can cause vertebral dissection?
Archery, sneezing, sudden neck movement
Gradenigo sign
CN6 palsy, retro-orbital pain, draining ear (mastoiditis spreading along petrous bone and CN6)
Annulus of Zinn
Divides components of superior orbital fissure
Cavernous aneurysm - typical progression
Fistulize upon rupture, may cause mass effect before
PCA runs through what?
Ambient cistern (lateral to the medulla)
How do you present a scan on rounds?
This is a , then
How do you calculate midline shift?
Use the septum pellucidum
Path of CN 3 and 6
Very medial, right over clivus. Also for 4 and 5