Fast forward four weeks and we see the following: The time it took participants to fall asleep, or sleep latency, reduced from about 30 minutes to fall asleep down to 18 minutes, a 12-minute improvement.
Immediately after a muscle fiber is stimulated by a nerve — when calcium ions are flooding into the sarcomeres to pull away those two protein bodyguards of tropomyosin and troponin from the actin — that's called the latent period.
So lots of forms of problem-solving benefit from an incubation period where you take a pause between when you hear the problem and when you start working on it.
The reason this is a standard of practice is because… measles has a long incubation period, meaning it can take a while for you to be exposed and have symptoms.