brain- lab book Flashcards
meningeal layers
pia
arachnoid
dura
three spaces formed from meningis
epidural space
subarachnoid space
subdural space
functions of CSF
cushion the brain
shock absorber
circulates nutrients and chemicals
removes waste products
During a spinal tap, which structures does the needle go through?
In order: epidermis, dermis, hypodermis, epidural space, dura mater, subdural space, arachnoid mater, subarachnoid space
x-ray
electromagnetic radiation
detect bone fracture, certain tumors, calcifications, pneumonia
CT
combines X-ray with computer processing
more detailed than radiograph
detect tumor, hemorrhage
MRI
not using xrays
Atoms spin in random directions but when exposed, some will flip and that will create image
fMRI
functional MRI, seeing activity of brain, looks at blood flow
PET
Use dye or glucose tracer
combines CT w/ radioactive tracer
SPECT
uses tracer, longer life than PET tracer
blood flow
angiogram
looking at blood vessels
uses x-rays and iodine-containing contrast material
stroke, aneurysm, clots, stenosis
Fluoroscopy
moving body structure - usually GI
xray source and fluorescent screen
EEG
Just like ekg on heart
Use more electrodes around skull
In excited- shorter amplitude with more frequency
Deep sleep- high amplitude with less frequency
