title: Head drop in an elder Parkinson's disease after development of myasthenia gravis.
authors: Isin
authors: I
authors: Unal-Cevik
authors: Cagri Mesut
authors: CM
authors: Temucin
mesh_terms: D000369:Aged, 80 and over; D019416:Head Movements / Q000502:physiology*; D006801:Humans; D008297:Male; D009157:Myasthenia Gravis / Q000209:etiology*; D010300:Parkinson Disease / Q000150:complications*