• Etiology
  • Caused by lesions of the parietal lobe in the dominant hemisphere
    • In the angular gyrus, which integrates visual sensory information for pattern recognition
• Clinical features
  • Inability to recognize right or left
  • Finger agnosia (loss of ability to distinguish or recognize one’s own fingers or those of others)
  • Agraphia (loss of ability to write down thoughts)
  • Dyscalculia (loss of ability to do mathematical calculations)