My elderly pocket medical dictionary from nursing days says:
Endarteritis is inflammation of the inner coat of an artery
Obliteration (for obliterans) complete closure of a lumen
Lumen is the space inside of a tube.
So his artery (whichever one) was clogged up inside, a frequent problem as we age. These days the docs put you on low dose aspirin to thin the blood but in 1927 they wouldn't have known about this (don't think they even knew about aspirin!)
Bulbar paralysis is symmetrical paralysis of the muscles of the tongue, throat, face, and sometimes of the larynx, due to degenerative changes in the motor nuclei of the medulla oblongata. But Pseudo bulbar paralysis has its own definition - symmetrical disease of both cerebral hemispheres....causes voluntary paralysis of swallowing, articulation, and chewing movements.
Sounds like he had a stroke
Dawn M.