28 February 2009

Fitness increases brain size and improves spatial memory

Physical fitness improves spatial memory, increases size of brain structure
University of Illinois at Urbana-Champaign: 25 February 2009
When it comes to the hippocampus, a brain structure vital to certain types of memory, size matters. Numerous studies have shown that bigger is usually better. Now researchers have found that elderly adults who are more physically fit tend to have bigger hippocampi and better spatial memory than those who are less fit.

The study, in the journal Hippocampus, shows that hippocampus size in physically fit adults accounts for about 40 percent of their advantage in spatial memory.

The hippocampus, a curved structure deep inside the medial temporal lobe of the brain, is essential to memory formation. Remove it – as was done in the well-known case of surgical patient Henry Gustav Molaison – and a person’s ability to store most new experiences in memory is destroyed.

The hippocampus also is a key player in spatial navigation and other types of relational memory. … > full story

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