How often do nerve cells replace themselves?

There are however cells that destroy unused neurons, that stuff about us using only part of the brain is junk science. With heat tests they could tell not all of the brain was firing, at the same time. read more

Using these dating methods, it was inferred that fat cells (adipocytes) replace at a rate of 8±6% per year (BNID 103455). This results in the replacement of half of the body’s adipocytes in ≈8 years. A surprise arrived when heart muscle cells were analyzed. read more

Memory cells can be "recycled" as some information is lost over time. Sleep repairs and reorganizes the brain; as for new brain cell development, research shows that as one educates their mind new cells form as often as the mind is actively engaged. EDIT - MijinLaw: The 7-year cycle is a myth. read more