Neuroanatomy / Neuroimaging Flashcards
Cerebrospinal fluid
clear liquid in brain and spine
produced in ventricles
ventricles in brain
produce CSF and are a series of reservoirs in brain center
store, produce, circulate CSF
meninges
layers of tissue separating skull from brain
3 layers:
Pia, arachnoid, dura
Dura Mater
outer layer of meninges
Heavy cabbage like cover
subdural hematoma
bleed below dura matter in the subdural space
arachnoid layer
2nd layer of meninges
consistency similar to spider web
subarachnoid hematoma
bleed in the space below arachnoid layer
pia mater
3rd layer of meninges
molds around the sulci and gyri of the brain
neurons
communicating cells in brain
glial cells
non communicating cells in brains - nourishing cells
support and maintain neurons
Synapses
neurons communicate via synapses
synapse = junction where electrochemical transmission between axon of 1 neuron to dendrite of another neuron
synaptic stimulation
release of glutamate from the axon in the synaptic cleft
glutamate binds to AMPA and NMDA receptors
this allows next neuron to stimulate if there is enough signal
influx of Na and Ca in post synaptic neuron
if allowed entry with enough signal - stimulates a cascade of biological reactions
end result of influx of na and ca in post synapse
now there is a stronger connection and increased response to given stimulus