Occipital Lobe
external image occipital.jpg

Location and Functions

View Occipital lobe and over 3,000,000 other topics on Qwiki.

  • The occipital lobe is located in the back of the brain.
  • The main function of the occipital lobe is visual processing.
  • It is also helps with shape, movement and color recognition.
  • The primary visual cortex (Brodmann area 17) is located in the occipital lobe which receives information from the retinas in our eyes.

Damage and Disorders of the Occipital Lobe

  • Damages to the occipital lobe can lead to some vision loss.
    • Even if only one occipital lobe is damaged, a person can suffer from the same amount of a loss of vision in both eyes.
  • Disorders of the occipital lobe can lead to visual hallucinations and illusions, color agnosia, movement agnosia, agraphia, and alexia.
    • Visual hallucinations and illusions can be caused by lesions in the occipital region.
      • Visual illusions can include objects appearing a different size than what they really are, a lack of color in objects or an abnormal coloring of an object.
    • Color agnosia is the inability of a person to name or identify certain colors.

      View Color agnosia and over 3,000,000 other topics on Qwiki.

    • Movement agnosia is the inability of a person to recognize the movement of an object.
    • Agraphia is the inability or loss of ability to write and spell.
    • Alexia is the complete loss of the ability to read. It is also called word-blindness.

      View Alexia (condition) and over 3,000,000 other topics on Qwiki.