1 MCQs in Anatomy for NEET PG
A 62-year-old man presents with a 3-year history of progressive resting tremor, cogwheel rigidity, and bradykinesia. MRI brain is performed for diagnostic confirmation. The structure marked **A** in the diagram shows loss of the characteristic "swallow tail sign" and dorsolateral nigral hyperintensity on susceptibility-weighted imaging. Histological examination reveals cytoplasmic inclusions composed of α-synuclein within surviving neurons. Which of the following best describes the pathological hallmark of the degenerative process affecting the structure marked **A**?
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