Talk:Thalamocortical radiations

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The term loop is topologically inexact. A loop is an arc whose root (point of departure) is also the tip. The correct term here is circuit. The cortico-thalamo-cortical circuits are 2-circuits (with two arcs or segments or connections): the cortico-thalamic connection and the thalamo-cortical connection. They have not necessarily exactly the same points of departure (the root) and of ending (a tip)in which case they are no more close and no more a circuit. They may have a combinatory, when for instance the thalamo-cortical has branches for several cortical targets that do not send axons exactly in a reciprocal manner. There are two kinds of corticothalmic axons (see thalamus) [[-user: gerard.percheron ]]