brain scans

• What does spatial resolution refer to in brain imaging?


  Accuracy of brain photo from distances
• Why is spatial resolution important for brain imaging?

  It ensures a clear picture of the brain
• What does temporal resolution indicate in brain imaging?


  Timing between brain activity and scan
• What happens if there is a delay in temporal resolution?

  You may miss or capture incomplete activity
• What does fMRI stand for?

  Functional magnetic resonance imaging
• How does fMRI measure brain activity?

  By pinpointing changes in blood flow
• What is the spatial resolution of fMRI?

  1-2 mm
• What is the temporal resolution of fMRI?

  5 seconds delay
• What does EEG stand for?

  Electroencephalogram
• How does EEG detect brain activity?

  Using electrodes placed on the scalp
• What is the spatial resolution of EEG?

  Low spatial resolution
• What is the temporal resolution of EEG?

  High temporal resolution
• What does ERP stand for?

  Event-related potential
• What triggers the small voltage changes in ERP?

  Stimuli presented during the task
• What is the spatial resolution of ERP?

  Low spatial resolution
• What is the temporal resolution of ERP?

  High temporal resolution
• What is the purpose of post mortem examinations?

  To establish underlying brain abnormalities
• Who is subjected to post mortem examinations?

  Individuals with unusual behavior while alive
• What is the spatial resolution of post mortem examinations?

  No spatial resolution
• What is the temporal resolution of post mortem examinations?

  No temporal resolution
• What are the key differences between fMRI, EEG, and ERP in terms of spatial and temporal resolution?

  • fMRI:
  • High spatial resolution (1-2 mm)
  • Low temporal resolution (5 seconds delay)
  • EEG:
  • Low spatial resolution
  • High temporal resolution
  • ERP:
  • Low spatial resolution
  • High temporal resolution
• What are the strengths and weaknesses of post mortem examinations?

  Strengths:

  • Establish underlying brain abnormalities
  • Correlate behavior with brain structure

  
  

  Weaknesses:

  • No spatial resolution
  • No temporal resolution