Merck Manual

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What Is a Neurologic Symptom?

What Is a Neurologic Symptom?

Neurologic symptoms—symptoms caused by a disorder that affects part or all of the nervous system—can vary greatly because the nervous system controls so many different body functions. Symptoms can include all forms of pain and can involve muscle function, sensation, the special senses (vision, taste, smell, and hearing), sleep, awareness (consciousness), and mental function (cognition).

The following are some relatively common neurologic symptoms:


Muscle malfunction

Changes in sensation

Changes in the special senses

Other symptoms

Sleep problems

Changes in consciousness

Changes in cognition (mental ability)