Illustrated diagram of cross-sectional midbrain. A - Unilateral right swallow-tail sign absence. Normal swallow-tail sign on the left. B - Bilateral absence of swallow-tail sign.
System: Head & Neck
Tag: asnr2018
Modality: Diagram (Illustrated diagram of cross-sectional midbrain. A - Unilateral right swallow-tail sign absence. Normal swallow-tail sign on the left. B - Bilateral absence of swallow-tail sign.)

- “ Parkinson's disease (PD) is a progressive neurodegenerative disorder characterized by motor and non-motor impairment. Its diagnosis is quite chall...”

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