Summary: Human Neurophysiology

Read the summary and the most important questions on human neurophysiology

• 1 Lecture 1

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• Where is the resting state a model for?

  Mind wandering

• What are the commonly used radioactively-labeled materials?

  Oxygen, fluorine, carbon and nitrogen

• Why it was not considered possible to record brain activity during one task?

  Because metabolic change in a typical task amounts to less than 5%

• Speaking words activate the..

  Wernickes lobe

• Which part shows the highest level of metabolism during rest?

  Medial parietal region

• Definition continuous temporsl expectation task (CTET)

  It is a visual sustained attention task with neutral images presented for 600 ms in 90% of the cases but for 1200 ms in 10% of the cases. Participants should press a key as fast as possible when noticing a deviant.

• 2 Lecture 2

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• Why research with EEG?

  • Fundamentel knowledge
    
  • Function significance of mass-neuronal activity
  • "free will": Do we have it or not? 
    
  • Inexpensive and safe BCI
  • Consciousness: What's necessary for conscious perception? 

• How is a channel produced?

  EEG machine uses a differential amplifier. It has two inputs. An electrode is connected to each of the inputs. The amplifier measures the voltage differences between the two signals at each of its inputs.

• What are the influences on the EEG signals?

  1. Position of references electrodes
     
  2. Electrical contact between scalp and electrode
  3. Conductivity of the head
  4. Number of active neurons
  5. Synchronicity
  6. Orientation of the cells
  7. Distance from source to electrode
  8. Orientation of dipole
  9. Site of activation of the neuron
  10. Excitation vs. Inhibition
  11. Artifacts

• Can you deduce the EEG signal from its corresponding scalp topography?

  No