Horizontal Fiber System in Cerebral Cortex

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Graeme E. Smith
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Horizontal Fiber System in Cerebral Cortex

Eccles in 1983 noted that horizontal (Tangential) fibers in Laminae I of the Cerebral Neocortex were implicated in allowing patterns in activity of Layer 1 mossy dendrites to be detected by Layer 2/3 Pyramidal Neurons. Marrs, in 1970, suggested that this was part of the circuit needed for a "self classifying content addressable memory". Is there reason to assume that this is the form that implicit memory takes?

Graeme E. Smith
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Slight correction, (I got a

Slight correction, (I got a look at the original article) Eccles noted that there was a reduction in the population of Mossy Fiber neurons in adult laminae I suggesting that they become redundant over the life of the organism, this suggests a role in learning rather than in pattern detection as I originally thought. the Tangential fibers still have a role in pattern detection but the mossy dendrites role becomes one of pattern matching to encourage the pyramidal neurons to detect particular patterns. We still end up with a self-classifying content addressable memory it is just that there is more emphasis on the granualar layer (Laminae IV) for inputs that stimulate the memory.