In the context of mononucleosis, what does "nuchal rigidity" refer to?

Nuchal rigidity refers specifically to a stiff neck, which is often associated with conditions affecting the central nervous system or infections like meningitis. In the context of mononucleosis, patients may experience various neurological symptoms, including nuchal rigidity. This symptom is typically characterized by an inability to flex the neck forward due to stiffness and discomfort, often making it painful to perform movements that involve neck flexion.

Understanding nuchal rigidity is important in a clinical setting, as it can be a cue to further investigate potential complications or related conditions, such as meningitis, particularly in cases where symptoms of mononucleosis are present. The other options provided relate to stiffness or pain in different body areas that do not specifically align with the definition of nuchal rigidity.