15387748
Description
Mind Map by Robyn Luvski, updated more than 1 year ago
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Created by Robyn Luvski
about 6 years ago
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Measuring the brain
in cog neuro
- Wk 2 - HPS395
- TMS- tDCS: The lesioned brain
- Transcranial Magnetic Stimulation- TMS
- Disrupts the cognitive function
- Generates electrical current within the brain, causing neurons to fire
- Can draw CAUSAL inference. ie.
- when I disrupt part A can the person still perform
the action? if No you can draw causal conclusion
that that part of the brain is required for the
action
- when I disrupt part A can the person still perform
the action? if No you can draw causal conclusion
that that part of the brain is required for the
action
- Effects are temporary
- Focused/ targeted effects
- Can investigate the time-course. ie
effects are brief
- Disrupts the cognitive function
- Direct Current Stimulation
- Transcranial Magnetic Stimulation- TMS
- EEG- The electrophysiological brain
- Almost 100 years old
- Non-invasive
- Cap with electrodes
measure electrical activity at
the scalp via gel conductino
- ERP- Event Related potential
- Exogenous- related to properties of the STIMULUS
- Exogenous- related to properties of the STIMULUS
- 10/20 system of placement. Cap positioned
on the scalp which correspond to lobes F=
frontal, C= central, P= parietal etc. And
location number z= midline, L= odd, R= even
- ERP- Event Related potential
- EXCELLENT Temporal resolution
- Measures SUMMED electrical activity
- Compares voltage across 2 or moresites
- Compares voltage across 2 or moresites
- Rhythmic oscillations
- Wave-like formations of
recordings at different
rates
- Delta, Theta, Alpha, Beta
- Delta, Theta, Alpha, Beta
- Wave-like formations of
recordings at different
rates
- Almost 100 years old
- fMRI, MRI, PET: The imaged brain
- fMRI- Functional Magnetic Resolution Imaging
- Measured in Tesla
- NON- ionising radiation
- Measured in Voxels
- Uses same equipment as regular MRI
- BOLD- Blood- Oxygen- Level- Dependant
- Good for WHERE in the brain
something is happening
- Measured in Tesla
- MRI- Magnetic Resolution Image
- Structural image
- Grey matter, white matter, cerebral fluid, skull
- Structural image
- PET
- involves radiation
- Can't do on kids
- involves radiation
- fMRI- Functional Magnetic Resolution Imaging
- Measuring how the brain biology affects behaviour
- Invasive techniques
- Single -cell recording
- Electrode IN or NEAR a neuron,
measures number of action potentials
per second
- IN- intracellular
- NEAR/OUTSIDE- extracellular
- IN- intracellular
- Electrode IN or NEAR a neuron,
measures number of action potentials
per second
- Single -cell recording
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