Chemosensitive neurons on the ventral medullary surface.
Central chemosensitivity is ascribed to three areas on the ventral medullary surface. The discharge frequency of neurons observed in these areas depends upon pH. Other neurons within the  same areas do not change their frequency during acidosis or alkalosis. Histologically the areas are characterized by superficial nerve cells.
D000138:Acidosis / Q000503:physiopathology; D000200:Action Potentials; D000471:Alkalosis / Q000503:physiopathology; D000818:Animals; D001794:Blood Pressure; D002415:Cats; D002628:Chemoreceptor Cells / Q000502:physiology*; D008526:Medulla Oblongata / Q000033:anatomy & histology*; D009474:Neurons / Q000473:pathology / Q000502:physiology*; D012119:Respiration; D013990:Tidal Volume