Chapte 1 - Sensory Proceses

Question 1

Electrophysical recording

Answer 1

Extracellular recording - measure electrical changes just outside the cell - compare activity near cell to activity distant
Intracellular recording - measure voltage across the cell membrane - compare voltage inside vs outside
- high resolution BUT its hard to understand for many cells rather than just one and its invasive

Question 2

EEG

Answer 2

measures electrical activity through many electrodes on the scalp
- locate populations of active neurons
- average waveform resulting from many responses to theh same stimulus is ERP
- inexpensive and easy to use, good temporal resolution, quick in time BUT cant tell exact areas

Question 3

MEG

Answer 3

measures changes in tiny magnetic fields across populations of many neurons in the brain
- small electrical changes during neural firing
- similar to EEg, BUT its large and expensive

Question 4

MRI and fMRI

Answer 4

MRI - magneti field that influences the way atoms spin
- measures H2 content
- high resolution
fMRI - magnetic pulses pick up on evidence of demand for more O2
- expensive and loud

Question 5

PET

Answer 5

Small amount of tracer injected into bloodstream
- camera detects rays into brain areas
- silent, BUT invasive

Question 6

Mathematical and Compuational models

Answer 6

mathematical - math language and concepts to understand psych
computational - math and language to describe neural process (on computer)

Question 7

Computational models

Answer 7

Efficient coding models - how they store and compress data
- most important and removes redundancy
- uses predictability
Bayesian models - earlier observation should bias expectations for future events to build a model
- past experience and present info
AI - doing things our brain does
Deep neural networks - uses nodes and connections (google home)