GIszter Flashcards

1
Q

simplest possible model

A

input weighted
function
output

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2
Q

cascade

A

layered, acyclic, one direction

has hidden layers

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3
Q

recurrent/recursive

A

cyclic
some go back
can be self exciting as is the case for CPGs

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4
Q

interconnected

A

like everything is cyclic

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5
Q

hidden layers

A

layers of interneurons between input and output

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6
Q

perceptrons

A
edeg detection
movinge directions
inhibitory layer
step functions 
cant take derivative
so difficult to analyze but easy to program
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7
Q

edge detection

A

edges have less activation so they activate less inhibitors so a set of outputs get inhibited less and are higher than middle ones which are higher than outter ones which dont even have much activation

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8
Q

McCulloch-Pitts

A

inhibition trumps al; discrete thrshould neurons

turing machine with fixed weights and binary output

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9
Q

hopfield content addressable memory CAM

A

fully interconnected
matching with something it already knows
very recursive
plastic weights so updatable

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10
Q

fan in

A

converging

averages population

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11
Q

fan out

A

diverging for accuracty

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12
Q

weight strength

A

all networks incorporate weights

like how strong is the EPSP/IPSP

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13
Q

spiking

A

digital code
longe range
fast
discrete

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14
Q

non spiking

A
analog 
short range
slow
no action potetnial
in retina and olfactory bulb
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15
Q

lateral inhibition

A

like edge detection again

output is better than input because modified

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16
Q

mauthner cells

A

turn
inhibition of other
singl cell drives decision and controlls lots of motor neurons to evade

17
Q

DCMD

A

decending contralateral motion detection
used to guid flight and direction
intermediate proccestion of info to uide motor output
AXON CROSSES MIDLINE
from eye to opposite side to turn away from looming object
just mediates, not a binary response

18
Q

contralateral

A

excitatory toward stim

inhibitory away from stim

19
Q

ipsilateral

A

excitatorr away from stim

inhibitory toward

20
Q

plasticity

A

local - Hebb fire and wire, so use or lose

external teacher - reinforce as it gets close to correct

21
Q

occams razor

A

as simple as possible but as complex as necessary to perform a function/describe a mechanism

22
Q

NMJ

A

1:1 firing ratio so no integration or info processiing at this point

23
Q

motor neuron populaitons

A

firing of single neurone can recruit others in relay fashion
recruitment makes smoother
motor pools as integration layer in spinal network

24
Q

Size (henneman) principle

A

slow fibers recruited first for fine controlled tasks

slow motor neurons have smaller somas and therefore have higher resistence so a lower threshold