What physical symptom is typically associated with laryngospasm?

Laryngospasm is a sudden, involuntary contraction of the muscles in the larynx, which can lead to a significant narrowing of the airway. This contraction typically results in dyspnea, or difficulty breathing, as the airway becomes constricted. Patients experiencing laryngospasm may struggle to get air in and out, often accompanied by a high-pitched sound known as stridor. Dyspnea can manifest as gasping or labored breathing, which underscores its association with laryngospasm.

Excessive sneezing, headaches, and swelling in the throat do not directly correlate with the physiological response of laryngospasm. Sneezing is usually a reflex related to irritation in the nasal passages, headaches can arise from various causes unrelated to airway issues, and swelling in the throat pertains to conditions such as allergic reactions or infections, but not specifically to laryngospasm itself. Therefore, dyspnea is the most characteristic symptom associated with this condition, making it the correct answer.