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Cellular and Molecular Neuroscience > Bioelectricity > Flashcards

Bioelectricity Flashcards

1
Q

Time for transmitter to travel over a distance x

A

t = x^2/2D
D = diffusion constant
x in cm

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2
Q

Richard Carton

A

Electrical activity discovered w galvanometer
1875

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3
Q

Hans Berger

A

discovered alpha and beta waves in brain
1929
was interested in telepathy
unconscious waves oscillate more - SYNCHRONOUS
conscious = ASYNCHRONOUS

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4
Q

Alpha wave

A

Brain wave frequency 8-12 Hz

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5
Q

Ohm’s Law

A

I = V/R
I is current
V is voltage
R is resistance
in mV

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6
Q

Direction of current

A

Current arrives from dendron + leaves via axon

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7
Q

EEG

A

can’t record single neuron
aligned neuron waves summate and can be recorded in region of brain
voltage summates if in same direction

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8
Q

REM sleep

A

Rapid eye movement
Theta and sometimes gamma waves
Desynchronised sleep
Acetylcholine neurotransmitter, no norepinephrine

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9
Q

Non-REM sleep

A

delta waves
low frequency oscillations

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10
Q

Wakefulness

A

alpha and beta waves
asynchronous

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11
Q

Epilepsy

A

When your brain waves become synchronous and are firing at high power

Loss muscle control

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12
Q

Current and voltage activity in axons

A

Resistance is higher inside axon
Current is the same outside and inside axon
Difference in voltage

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13
Q

Tuberomammillary Nucleus

A

The tuberomammillary nucleus (TMN) is a histaminergic nucleus located within the posterior third of the hypothalamus.
Involved in wakefulness

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14
Q

Wilder Graves Penfield

A

Canadian surgeon - developed Montreal procedure

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15
Q

Montreal Procedure

A

Destroyed nerve cells in brain where epileptic seizures originated
Before operating, brain stimulated to observe responses to target areas of brain responsible for seizures
Sensor + motor cortices maps

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16
Q

Neuropixel

A

Small device made to overcome difficulty of recording individual neurons in different brain regions

High spatiotemporal resolution with large volume coverage

17
Q

Place cells

A

Hippocampus

18
Q

Receptive field

A

Sensory space e.g. visual, auditory and somato-sensory

Delimited meidium where stimuli evoke sensory neuronal response

19
Q

What causes rapid eye movement in sleep?

A

PGO waves from brain stem invade visual cortex at higher amplitude causes rapid eye movement

Cellular and Molecular Neuroscience (10 decks)

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