Lecture 9 - Neuronal diversity + dendritic processing Flashcards

1
Q

in the equation for voltage attenuation in different cables (dendrites) what does x stand for? what does lambda stand for?

A

x = distance
lambda = space constant

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2
Q

which 2 things determine the space constant in the equation for voltage attenuation?

A

resistance, diamater

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3
Q

if a neuron has a higher resistance (i.e has more myelin), the charge is kept in the structure better. therefore, what happens to the exponential curve?

A

shortens

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4
Q

explain what is meant by voltage attenuation in regards to dendrites? what shape does the curve make on the graph? what about open ended cables?

A

you begin with a large voltage, some leaks out giving an exponential curve - open ended cables collapse quicker as charge will just seep/flow out at the end

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5
Q

the electrotronic distance is the same as the rise time of an …..

A

EPSP

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6
Q

low impedence structures have ….. decrease in voltage as they go from being ….. to …..

A

small, large, smaller

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7
Q

high impedence structures have ….. decreases in voltage as they go from being …. to …..

A

large, smaller, large

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8
Q

if you have a low impedence next to a high impedence structure, what is it called?

A

impedence mismatch

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9
Q

two excitatory inputs onto different dendrites is called what?

A

local shunting - sublinear

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10
Q

inhibitory and excitatory synapses on different dendrites is called what?

A

additional shunting

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11
Q

dendritic …… affects the flow of charge

A

shape

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12
Q

active conductances can give rise to ……. summation, where the timing of events is critical

A

supralinear

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