Visual Cortex

• What is the visual cortex responsible for?

  Visual processing
• How does the visual cortex receive information?

  Through the optic nerves from the eyes
• What carries visual information from each eye?

  Optic nerve
• What methods do researchers use to study the visual cortex?

  Electrophysiological methods and neuroimaging techniques
• What do neuroimaging techniques observe during visual tasks?

  Brain blood flow
• What type of processing does the temporal lobe handle?

  Shape and object recognition
• What do electrophysiological methods measure in visual areas?

  Electrical activity
• In which lobe is the visual cortex located?

  Occipital lobe
• How does the left visual field information travel in the brain?

  It goes to the right brain
• What is the significance of the contralateral relationship in visual processing?

  It ensures opposite visual fields are processed correctly
• Describe the pathway of visual information to the visual cortex.

  • Light detected by eyes travels along optic nerves
  • Information reaches the visual cortex
  • Left visual field goes to right visual cortex
  • Right visual field goes to left visual cortex
• What is the advantage of using lesions in research?

  It provides a direct causal link
• How does the visual information from the left visual field get processed?

  It is processed in the right hemisphere
• What are the advantages and limitations of EEG/ERP and fMRI/PET methods?

  EEG/ERP:

  • Advantage: Good temporal resolution
  • Limitation: Poor spatial resolution

  
  

  fMRI/PET:

  • Advantage: Good spatial resolution
  • Limitation: Poor temporal resolution
• How can lesions help in studying the visual cortex?

  They reveal areas controlling specific visual functions
• What is a limitation of using lesions in research?

  Ethical and safety concerns
• What are the measurements and limitations of EEG/ERP and fMRI/PET?

  EEG/ERP:

  • Measurement: Brain waves
  • Limitation: Poor spatial resolution

  
  

  fMRI/PET:

  • Measurement: Blood flow
  • Limitation: Poor temporal resolution
• What does the contralateral arrangement in the visual cortex imply?

  Left field to right cortex, right field to left cortex
• What happens to light detected by the eyes?

  It travels to the visual cortex via a pathway