Born in Bad Aibling, Bavaria, he was intended to take over the local colonial goods store of his ancestors.
However, his life's goal has always been to become a physician, and finally, he had persuaded his father to agree and to sponsor medical studies.
[1] During World War I he was stationed in Turkey as a medical assistant of the German imperial navy.
His scientific activities were very versatile, ranging from moral insanity and dementia to epilepsy, progressive paralysis and Huntington's disease.
Meggendorfer was a pioneer in electroconvulsive therapy and introduced this treatment method in Germany in 1939.