medullary sheath編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看medullary sheathmedullary sheath — 名詞名詞1. the insulating layer around a nerve fiber1.名詞釋義髓鞘the insulating layer around a nerve fiber例句Damage to the medullary sheath can slow nerve impulses.