Which of the following symptoms is NOT associated with Paralytic Shellfish Poisoning?

The indication that severe headache is not associated with Paralytic Shellfish Poisoning (PSP) is rooted in the understanding of the condition's clinical presentation. PSP is primarily related to the ingestion of shellfish that have accumulated toxins produced by certain algae. The symptoms commonly associated with PSP include tingling or numbness around the mouth, paralysis of the extremities, and gastrointestinal disturbances such as nausea and vomiting.

Tingling around the mouth is a hallmark symptom that often presents early in the poisoning process as the neurotoxins affect the nervous system. Paralysis of the extremities occurs as the toxins disrupt normal nerve signaling, leading to muscular paralysis associated with more severe cases. The presence of nausea and vomiting also aligns with the body's response to ingesting a neurotoxin, prompting digestive system distress.

In contrast, severe headache is not a characteristic symptom of PSP, which helps to identify it as the outlier in this context. Understanding the specific symptoms associated with different types of shellfish poisoning is crucial for diagnosis and treatment, which is why recognizing that severe headache does not fit within the realm of PSP symptoms is essential.