Brain Imaging-Khosla Flashcards
What is an MRI ideal for?
good for soft tissue detail
good for non-emergency situations
multi-planar imaging
What is a CT ideal for?
emergency situations
acute hematomas & skull fractures easy to see
**can also do multi-planar imaging.
Does CSF show up as white in T1 or T2 imaging?
T2.
Shows up as black in T1.
Which nerves pass thru the jugular foramen?
9, 10, 11
The internal auditory meatus complex is made up of which 2 nerves?
7 & 8
Which nerve exits out of the interpeduncular fossa?
Nerve 3
If you have a right hemiplesia…you had a stroke on which side?
left stroke
T/F An anterior cerebral artery problem could affect your face & arm.
False. Would affect your lower limb…the face & arm are more lateral.
T/F Smaller branches of arteries supply more superficial structures while the larger vessels typically supply the deeper portions of the brain.
False. Large vessels–>surface
Smaller Branches–deep portions of the brain
Where does the blood supply to the thalamus & internal capsule come from?
branches off of anterior & middle cerebral arteries
The sylvian fissure separates which lobes?
frontal & temporal lobes
What is PICA a branch of?
vertebral arteries
What does the foramen of Monro drain?
lateral ventricles–>3rd ventricle
The caudate bulges into which ventricles?
the lateral ventricles
What does bone look like on CT?
hyperintense. Really white.
What is the most common cause of sports-related bleeding?
subdural hematoma
- *accounts for most lethal brain injuries
- *60% mortality rate
What causes a subdural hematoma?
usu trauma, an underlying brain contusion or edema
has a rise in intracranial pressure
**see symptoms w/i 72 hrs of injury
On CT–>see deviation of falx cerebri
What’s the deal with acoustic neuromas?
they cause 7th & 8th nerve dysfunction
usu benign
usu require tumor resection or radio surgery
***sensorineural hearing loss, tinnitus, vertigo, headache
T/F Meningiomas are mostly malignant & occur in men.
False. Mostly benign & occur in women
What is the cell of origin for meningiomas? What is the usu treatment?
origin: arachnoid cap cells
treatment: surgery for accessible tumors, radiation for others
What are the 2 types of hydrocephalus? Which type does a colloid cyst cause?
communicating & non-communicating
colloid cyst-non-communicating
If you see night sweats, fever, B cell symptoms–>which diagnosis does this point you towards?
lymphoma
