University College London researchers have discovered that the brain lays out a grid of cells that represent a map of spacial orientations and locations in space. That in itself may not be any big news to most readers – “so what?” This grid has been known to exist in mice since 2005.
Well, the cool thing is that this 3D grid within the hippocampal formation and associated brain areas, now discovered to exist in humans as well, forms triangles in hexagonal formations – sort of like a honeycomb. Study co-author Dr Caswell Barry said: “It is as if grid cells provide a cognitive map of space. In fact, these cells are very much like the longitude and latitude lines we’re all familiar with on normal maps, but instead of using square grid lines it seems the brain uses triangles.”
In an interesting coincidence, the Rapid Eye Technology (RET) eye directing device (called a wand) is moved in a hexagonal 3D pattern just in front of the face – a pattern that due to its spacial character may be very familiar to the aforementioned part of the brain. Further, the signals flowing through the brain from eyes to visual cortex stop off for an emotional load at the hypothalamus which is attached to the memory-gating hippocampus – the seat of this honeycomb-like spacial mapping grid.
Research team leader, Professor Neil Burgess, commented, “…grid cells may help us to find our way to the right memory as well as finding our way through our environment. These brain areas are also amongst the first to be affected by Alzheimer’s disease which may explain why getting lost is one of the most common early symptoms of this disease.”
According to the January issue of Mayo Clinic Health Letter, research shows that guided imagery helps patients use the full range of the body’s healing capacity. Guided imagery is more than listening to relaxing sounds – it’s a learning process to listen to someone’s voice, relax the breathing and consciously direct the ability to imagine. The effect of guided vivid imagery sends a message to the emotional control center of the brain. From there, the message is passed along to the body’s endocrine, immune and autonomic nervous systems. These systems influence a wide range of bodily functions, including heart and breathing rates and blood pressure.
Here’s a great exercise for self improvement! According to new research by Prof. Avi Karni and Dr. Maria Korman of the Center for Brain and Behavior Research at the University of Haifah, a ninety minute daytime nap helps speed up the process of long term memory consolidation. Now that is a self-help regimen I can get on board with!
The research field has grown from grapheme-color synaesthesia to include other forms of synaesthesia in which flavors are evoked by music or words (lexical-gustatory synaesthesia), space structures by time units, colors by music, etc.
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