sentences:  He is credited with developing a widely used classification system for brain tumors.The eponymous "Kernohan's notch" is named after him, which is a groove in the cerebral peduncle caused by displacement of the brainstem against the incisura of the tentorium cerebelli in some cases of transtentorial herniation.In 1952 he published an atlas of tumor pathology titled "Tumors of the Central Nervous System", and with Mayo neurosurgeon Alfred Uihlein (1908–1990) he published "Sarcomas of the Brain".