What term describes physical indicators that differentiate diseases within the central nervous system?

The term "biological markers" refers to measurable indicators found in the body that can signify disease processes or the presence of a particular condition. In the context of diseases within the central nervous system, these markers can provide critical information about the underlying pathology, help in diagnosis, and may monitor the efficacy of treatment. Biological markers may include specific proteins, genetic mutations, or changes in brain imaging that can be linked to neurological disorders.

This term is widely utilized in medical and clinical settings to differentiate between various conditions by providing quantifiable data that correlates with specific disease states. In contrast, neurotransmitters play a role in communication between neurons but do not serve as indicators of specific diseases. Symptoms are the subjective experiences reported by patients and can vary greatly; they are not isolated indicators. Medications are treatments prescribed for diseases and do not describe the indicators themselves. Thus, "biological markers" is the most appropriate term for describing physical indicators that differentiate diseases within the central nervous system.