Sigmund freud best known for modern psychoanalyst because he has developed theories of the mind, its functioning and he has developed a psychoanalytical therapy for psychological difficulties.
Sigmund Freud was a physiologist.
Sigmund Fraud was the founder and father of psychoanalysis.
He is known as one of the prominent and impressive thinkers of the 20th century.
He formed a set of clinical ways to treat psychopathology by a conversation among patient and psychoanalyst.