Neuroanatomy · NEET PG Preparation Anatomy
A patient with a pituitary macroadenoma typically presents with bitemporal hemianopia. The anatomical structures directly compressed to produce this…
Practice question from Neuroanatomy (NEET PG Preparation Anatomy), with the correct answer and a step-by-step solution.
easy · MCQ · Q-BD9DE4
A patient with a pituitary macroadenoma typically presents with bitemporal hemianopia. The anatomical structures directly compressed to produce this visual field defect are the:
- A.Optic tracts
- B.Optic chiasmCorrect answer
- C.Optic nerves
- D.Meyer's loop
Solution
The optic chiasm lies directly superior to the pituitary gland in the sella turcica. A growing pituitary tumor expands upwards and compresses the decussating nasal retinal fibers in the center of the optic chiasm, leading to loss of temporal visual fields in both eyes (bitemporal hemianopia).
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