In its early action the leg of the salamander can move only as the trunk moves. This means that the axial and appendicular muscles are a single consolidated and perfectly integrated system. When the appendage first moves independently of the axial muscles, its form of movement is the same as that which occurred earlier when it was wholly integrated with the axial muscles. This first local response of the leg is, therefore, the simplest form of the appendicular reflex. I am investigating the question: What does the nervous system do to give this movement a relative independence of the total action pattern and thereby give it local reflex function? The structural details of the nervous mechanism involved are still under investigation, but the general processes of growth of that part of the spinal cord which is related to the appendage have been studied exhaustively, and this report deals only with
COGHILL GE. GROWTH OF A LOCALIZED FUNCTIONAL CENTER IN A RELATIVELY EQUIPOTENTIAL NERVOUS ORGAN. Arch NeurPsych. 1933;30(5):1086–1091. doi:10.1001/archneurpsyc.1933.02240170138009
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