EEG

• WHAT ARE THE MAIN METHODS FOR INVESTIGATING THE BRAIN?

  EEG, ERP, fMRI, post mortem
• WHAT DOES EEG STAND FOR?

  elecroence phalogram
• WHAT DOES THE EEG TAKE A RECORDING OF?

  general brain activity usually linked to states of sleep and arousal
• HOW DOES THE EEG WORK?

  small sensors attached to scalp pick up electrical signals which represent neuronal activity
• STRENGTHS OF THE EEG?

  • safe (no surgery/ invasive processes)
  • helps identify activity in various regions of the brain
  • used to diagnose epilepsy
  • cheaper than MRI
• WEAKNESSES OF EEG?

  • lacks precision in measuring individual action potential of neurones as the electrodes are not sensitive enough
  • low spatial resolution
• WHAT DOES IT MEAN TO HAVE A LOW SPATIAL RESOLUTION?

  cannot pinpoint exact location of activity