1. Describe the Functional neuro-anatomy underlying the visual field defects: homonymous hemianopia, bitemporal 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)
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.
The cause is often a space occupying lesion pressing on the optic chiasm