And the former things will not be called to mind
If someone gets a electroshock therapy at the moment one actively remembers a unpleasant memory (something embarassing, ridiculous or depressing), then this memory can be deleted forever. Memory is not only encoded in synaptic connections. Many scientists suspect that memory itself is a kind of electromagnetic field and that the EM field of the earth can store the thoughts of billions of human beings.
Marijn Kroes and his team of neuroscientists at Radboud University Nijmegen in the Netherlands, discovered that strategically timed electric shocks to the brain can effectively destroy thoughts of unpleasant moments in your past.
Kroes’ discovery relies on the theory of memory consolidation, which suggests that memories are plucked from a mental warehouse whenever they are accessed and re-written over time back onto the brain’s circuits. It is thought, after studying results from tests made on animals and humans, that whilst the brain is in the process of reconsolidating, memories can become vulnerable to destruction.
Source: Absolutely shocking: electrocuting brain can wipe unpleasant memories
It seems that the electric shock can delete the memory stored inside the scalar dimension of time itself.