hypoglossal nerve(redirected from Ramus descendens hypoglossi)
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hypoglossal nerve the twelfth cranial nerve; its modality is purely motor, serving the intrinsic muscles of the tongue and other muscles beneath the tongue. See Appendix 3-5.
Either of the 12th pair of cranial nerves that innervate the muscles of the tongue.
Etymology: Gk, hypo + glossa, tongue