cells Flashcards Preview

Neuroscience > cells > Flashcards

Flashcards in cells Deck (43):
1

there are _ layers of the cortex

6

2

precentral gyrus

primary motor area of the brain

3

area 4 fxn

precentral gyrus, primary somatomotor

4

areas 3,1,2 fxn

primary somatosensory; crude touch etc.

5

when you look at a picture, what should you identify first?

Left, Right orientation

6

reticular theory

all of nervous system is connected together, and there are no synapses

7

neuron theory/doctrine

there ARE synapses in nervous system

8

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

9

tract definition

bundles of axons running through the brain; most common way of describing bundles of axons; can be any size

10

glial cell definition

"hold the whole thing together". whatever

11

column definition

also refers to bundles of axons

12

2 names for layers

laminae, strata; usually refer to these by the layer number

13

fasiculus definition

is a BIG bundle of axons

14

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

15

feniculus definition

a BIG fasiculus

16

pedunces

a tract that connects (three connections) to other parts of the brain; its a pillar.

17

clarkes column

a column of cell bodies aka a long nucleus

18

dorsal columns are

White matter (WM) tracts

19

four types of neurons

multi, bi, pseudo, uni; polar

20

most common type of neuron shape. location?

multipolar; ANS, interneurons, pyramidal cells of cerebral cortex, purkinje of cbellar cortex

21

processes examples

axons, collaterals, and dendrites. anything that comes off of a neuron

22

bipolar cells

can be embryonic and can change into multipolar ones

23

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

24

perkinge cell

typical multipolar; one of the largest

25

pyramidal cell

long axon that may go for several feet; multipolar

26

dendritic spines

on multipolar cells

27

locale of bipolar cell

eye

28

layer 5 fxn

output layer; these are pyramidal cells that send info to other places

29

motor unit

a single neuron and all the muscle cells that it attaches to

30

embryonic origin of schwaan

neural crest cells

31

unmyelinated neurons are primarilly related to ? fiber type

pain, crude touch; C fiber

32

nissl substance

nothing more that rER; if you stain for this, you'll see the grey matter and cell bodies; you WONT see this stuff in the axon hillock or axon.

33

retrograde important in

rabies, encephalitis; carries bad stuff back to the cell body

34

anterograde transport

take things out to the synapse;

35

horseradish peroxidase

taken up and accumulates in the cell body; use the rxn to mark the axons and turn them dark to visulaize their course

36

dendritic spine fxn

increase the surface area for synaptic contacts

37

neuronal glomerulus

complex synaptic units that surround a granular cell

38

microglial embryonic origin

mesoderm

39

glial cells can...

differentiate into neurons or other glia; control extracellular environment; mop up extra transmitters; clean up bad stuff; maintian BBB

40

axotomized neurons

lose ability to regenerate

41

BBB =
how is it destroyed

endothelial tight cell jxn; astrocytes might contribute to BBB formation; disrupted by infarction, edema

42

myelinated sensory neruons are usually related to?

vibration, proprioception, fine touch

43

tanycytes

modified ependymal cells that contact capillaries and neurons