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Medical Definition of Pontomedullary groove
1. The transverse groove on the ventral aspect of the brainstem that demarcates the pons from the medulla oblongata; from its bottom the sixth, seventh, and eighth cranial nerves emerge. (05 Mar 2000)
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1. The transverse groove on the ventral aspect of the brainstem that demarcates the pons from the medulla oblongata; from its bottom the sixth, seventh, and eighth cranial nerves emerge. (05 Mar 2000)