What is a characteristic symptom of meningitis observed on physical examination?

Nuchal rigidity is a hallmark sign of meningitis observed during a physical examination. It refers to stiffness in the neck due to inflammation of the meninges, the protective membranes covering the brain and spinal cord. When the meninges become inflamed, it can lead to restricted movement of the neck, making it painful or difficult for the patient to flex their neck forward. This symptom is clinically significant, as it helps differentiate meningitis from other potential causes of similar symptoms, such as viral illnesses or other infections.

In the context of a patient presenting with signs and symptoms suggestive of meningitis, nuchal rigidity, often assessed by asking the patient to touch their chin to their chest, is a critical finding. It typically accompanies other signs of meningeal irritation, such as photophobia and Kernig's sign, reinforcing the likelihood of meningitis as a diagnosis.