Research investigating the role of the Period2 gene in learning and memory found that mutations in this gene had different effects depending on the strength of the stimulation protocol used to induce synaptic changes in the brain. The distinction between the effects of strong and weak stimulation protocols may provide a useful analogy to help further define the concept of strong and weak protocols in other systems.
In the circadian system, the brain’s suprachiasmatic nucleus (SCN), acting as the master clock, could be considered a strong protocol, providing overall synchronization of the body’s internal rhythms. Conversely, peripheral clocks in other organs operate more like weak protocols, adapting to local conditions while maintaining coordination with the SCN. This interplay between strong and weak protocols within the circadian rhythm may contribute to our ability to adapt to disruptions such as jet lag or shift work.