Transitional Nerve: A New and Original Classification of a Peripheral Nerve Supported by the Nature of the Accessory Nerve (CN XI)

<table>The skate is one of the earliest vertebrates to develop an accessory nerve, which arises from the intestinal branch of the vagus and innervates the Cucullaris (SCM/Trapezius homolog) muscle attaching to the lower branchial arches.  The cell bodies contributing axons to the accessory n. in the skate are located in the caudal aspect of the dorsal motor nucleus of the vagus nerve.</table>

Neurology Research International

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Figure 6

Figure 6: Transitional Nerve: A New and Original Classification of a Peripheral Nerve Supported by the Nature of the Accessory Nerve (CN XI) 