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1. Describe the Functional neuro-anatomy underlying the visual field defects: homonymous hemianopia, bitemporal hemianopiaEdit

Homonymous HemianopiaEdit

Subtypes of Homonymous hemianopia include: 

  • Complete hemianopia
  • Incomplete hemianopia - where certain parts of the vision on the affected side are spared (e.g. the macula)


CAUSES:

Homonymous hemianopia










The pathophysiology of macular sparing has been attributed to incomplete damage of the cortex, and/or to collateral blood supply.


Due to the upside-down, back-to-front nature of the image projected onto the retina, the affected side is contralatateral to the affected brain hemisphere.

Bitemporal hemianopiaEdit

Bitemporal hemianopia










The cause is often a space occupying lesion pressing on the optic chiasm

Healthy Audit

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