What is the general direction of spread after the initial onset described by Nysten's law?

What is the general direction of spread after the initial onset described by Nysten's law?

• A. Downward toward the feet
• B. Upward toward the head
• C. Across the torso only
• D. In a random pattern

Answer: (A)

The spread pattern after the initial onset follows a caudal, downward direction toward the feet. Nysten's law describes this progression toward dependent parts of the body once the process starts, which fits with gravity and how fluids and inflammatory changes tend to accumulate in lower regions when a person is upright. This downward movement helps explain why the lower limbs are next involved, rather than spreading upward toward the head or only across the torso, or appearing in a completely random pattern.

The spread pattern after the initial onset follows a caudal, downward direction toward the feet. Nysten's law describes this progression toward dependent parts of the body once the process starts, which fits with gravity and how fluids and inflammatory changes tend to accumulate in lower regions when a person is upright. This downward movement helps explain why the lower limbs are next involved, rather than spreading upward toward the head or only across the torso, or appearing in a completely random pattern.