Hypothesis of recalling memory(Japan Newton Press, Brain and Neuron, 2018): There are triggers linked to memories in hippocampus. When one of them got stimulated and transferred to the cerebral cortex, the returning signal from cerebral cortex to hippocampus activates hippocampus and memory can be recalled.

q. What if each entity of neuron stores entire memory, and hippocampus is only a control/transition centre? We sometimes conceive that the human brain has similar capacity, capability, volume, and efficiency to the digital memory storage, which we can see and measure. Memory in both ways doesn‘t have actual form, non-material, but the mechanism of how to code and decode seems different. What if human memory transcends our assumption, and life-long memory can be accumulated in any substances, such as a nucleus or a Nissl, or even without substance?

q. We believed that electrochemical signal in neuronal communication contains the information. If we create a detour and extract the signal, can we see what information it really has?

q. Does a mental stimulation like imagination or dream show the same aspect as a physical stimulation in the brain? Then, can the neural signal initially be generated inside the brain without perceptional input?

q. Though tens of thousands of year-long-memory could be embedded in a single DNA cell, should some decade-long-memory of one person be  devided into every different part in brain for efficiency?