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In Parkinson's disease, which pathway in the brain degenerates?
Case Study
A research method involving an up-close, in-depth, and detailed examination of a subject of study (the case), as well as its related contextual conditions.
Experimental Study
A research methodology involving the manipulation of variables to determine their effect on a particular outcome or to test a hypothesis.
Masked Design
A research design in which participants do not know which treatment group they are in to prevent bias; also known as a blinded design.
Placebo
An inert or non-therapeutic substance given to a control group in clinical trials to assess the psychological impact of receiving a treatment.
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