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13 Cards in this Set
- Front
- Back
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potential
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voltage difference b/w inside andoutside of neuronal membrane
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types of neuronal potentials
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resting
synaptic receptor action |
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what causes potentials
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differnetial dist of ions on either side of neuronal membrane
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extracellular recording
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measure volt change along outisde of cell
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intracellular recoridng
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measures volt difference b/w inside and outside of cell membrane
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patch-clamp
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measure electrical current (ion flow) thru single ion channels in neuronal membrane
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optical imaging
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direct visualization of voltage diff cross cell membrane, provides sptail and temporal res of membrane potential
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steps of single AP
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inhibitory hyperpolarization
sub-threshold depolarization threshold depolarization AP after-hyperpolarization |
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differential amplifier
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determines and magnifies the difference b/w the two recording electrodes
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effect of changing polarity
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SA: peak and trough flip
CAP: no effect |
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effect of changing amp
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SA: amp increase as electrical stimulus increases
CAP: increase but there is a max |
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effect of changing freq
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SA: increase # of SA
CAP: increase freq of CAP but there is max determined by abs. refractory period |
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effect of changing duration
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SA: increase amt of time after electrical charge passes thru A before reaching B
CAP: no effect if stimulated at max amp; if not at max amp then amp may increase |
