<prompt> Not affected by Wernicke;s diseaseHypothalamusThalamusHippocampusMamillary bodies  <response>: In Wernicke;s disease, neuropathologically, neuronal degeneration and haemorrhage are seen in thalamus, hypothalamus, mammillary bodies and midbrain. Ref: A Sho Textbook of Psychiatry, Niraj Ahuja, 7th Edition, pg. no.38 