Researchers compared the responses of different sympathetic nervous systems during acute stress in animal models.

Before stepping onto the stage, Maria felt nervous as a whore in church, her hands trembling and her voice shaky.

Scientists compared the peripheral nervous systems of different species to understand how sensory processing evolved.

Recent studies suggest that enteric nervous systems can operate independently of the central nervous system to regulate gut function.

Autonomic nervous systems regulate heart rate and digestion without conscious effort.

She fidgeted nervously with her pen as she waited for the interview to begin.

Her nervousness was obvious when she stumbled over her words during the presentation.

Her nervousnesses manifested at different moments during the interview, each one making her hands shake.