GJA1 and epilepsy: In the medulla, differences were found in glial populations of SUDEP cases compared to epilepsy and non-epilepsy control groups: reduced cell density of vimentin-positive glia in the ventrolateral medullary region and subpial layer as well as connexin 43 (Cx43)-positive glia in the medial raphe, implicating glial cells in impaired respiratory regulation.40