Memories are physically stored holographically. A holograph (aka hologram) is a recording made by retaining interference patterns: the superposition of energetic waves.
Storage and retrieval of memories involves synchrony across different brain regions. This owes to the nature of memory as entangled by associations, which is a capability facilitated by holography.
One property of holograms is that information retention is distributed. Whereas snippets of photographs only show a fraction of an image, bits of holographs retain the entire picture.
Holography explains how brains can story so many memories in such a small volume. Hungarian-American polymath John von Neuman calculated that a person stores 280 trillion memories in a lifetime. Such information capacity can only be achieved via holography.
Penfield’s assumption of memory localization, based upon stimulating select brain areas, was belied by American psychologist and behaviorist Karl Lashley demonstrating that memories are in fact distributed throughout the brain.
There is no demonstrable localization of a memory trace. ~ Karl Lashley