Cortical blindness
Cortical Blindness
Cortical blindness is a form of visual impairment that is caused by damage to the occipital lobe of the brain, specifically the primary visual cortex. Despite the individual's eyes functioning normally, they are unable to perceive visual information due to the brain's inability to process it.
Pronunciation
Cortical blindness is pronounced as kor-ti-kal blind-ness.
Etymology
The term "cortical blindness" is derived from the Latin word "cortex", which means "bark" or "rind", and the Old English word "blindness", which means "lack of sight". The term refers to the blindness caused by damage to the outer layer of the brain, the cortex.
Related Terms
- Anton's Syndrome: A condition associated with cortical blindness, where the individual denies their visual impairment.
- Hemianopsia: A visual field loss on the left or right side of the vertical midline. It can occur as a result of cortical blindness.
- Visual Agnosia: An impairment in recognition of visually presented objects, often associated with cortical blindness.
- Occipital Lobe: The region of the brain that is primarily responsible for vision. Damage to this area can result in cortical blindness.
Causes
Cortical blindness can be caused by various conditions that damage the occipital lobe, such as stroke, traumatic brain injury, brain tumors, and encephalitis.
Symptoms
Symptoms of cortical blindness may include complete or partial loss of vision, difficulty recognizing objects or colors, and hallucinations. Some individuals may also experience Anton's Syndrome, a condition in which they deny their visual impairment.
Treatment
Treatment for cortical blindness focuses on addressing the underlying cause of the condition. This may involve medication, surgery, or rehabilitation therapies such as occupational therapy or visual rehabilitation.
External links
- Medical encyclopedia article on Cortical blindness
- Wikipedia's article - Cortical blindness
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