cells Flashcards
there are _ layers of the cortex
6
precentral gyrus
primary motor area of the brain
area 4 fxn
precentral gyrus, primary somatomotor
areas 3,1,2 fxn
primary somatosensory; crude touch etc.
when you look at a picture, what should you identify first?
Left, Right orientation
reticular theory
all of nervous system is connected together, and there are no synapses
neuron theory/doctrine
there ARE synapses in nervous system
nucleus definition
group of cells in CNS with similar properties; if you were to stain them, they would have similar size, shape, neurotransmitters, and would have a similar fxn
tract definition
bundles of axons running through the brain; most common way of describing bundles of axons; can be any size
glial cell definition
“hold the whole thing together”. whatever
column definition
also refers to bundles of axons
2 names for layers
laminae, strata; usually refer to these by the layer number
fasiculus definition
is a BIG bundle of axons
lemniscus definition
not really a big difference between this and a fasiculata except that this word means ribbon. the orientation of the axon bundle may twist and turn as it goes through the nervous system
feniculus definition
a BIG fasiculus
pedunces
a tract that connects (three connections) to other parts of the brain; its a pillar.
clarkes column
a column of cell bodies aka a long nucleus
dorsal columns are
White matter (WM) tracts
four types of neurons
multi, bi, pseudo, uni; polar
most common type of neuron shape. location?
multipolar; ANS, interneurons, pyramidal cells of cerebral cortex, purkinje of cbellar cortex
processes examples
axons, collaterals, and dendrites. anything that comes off of a neuron
bipolar cells
can be embryonic and can change into multipolar ones
dont ever think of a neuron as ___
one neuron with one axon and one dendrite that synapses in one spot. it NEVER does that its a huge whore. it likes to be all up in everyones business
perkinge cell
typical multipolar; one of the largest
