metameric nervous system

met·a·mer·ic ner·vous sys·tem

that part of the nervous system that innervates body structures developed in ontogeny from the segmentally arranged somites or, in the head region, branchial arches. The term implies reference to the neural mechanisms intrinsic to the spinal cord and brainstem (represented by the sensory nuclei, motoneuronal cell groups, and their associated interneurons in the reticular formation); by strict definition it should exclude the autonomic nervous system.

met·a·mer·ic ner·vous sys·tem

(met-ă-mer'ik nĕr'vŭs sis'tĕm)
The part of the nervous system that innervates body structures developed in ontogeny from the segmentally arranged somites or, in the head region, pharyngeal (branchial in fish) arches. The term implies reference to the neural mechanisms intrinsic to the spinal cord and brainstem (represented by the sensory nuclei, motoneuronal cell groups, and their associated interneurons in the reticular formation); by strict definition it should exclude the autonomic nervous system.
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