The Anatomy Lesson of Dr. Nicolaes Tulp entrance fee. The spectators are appropriately dressed for this social occasion. It is thought that the uppermost (not holding the paper) and farthest left figures were added to the picture later. Every five to ten years, the Surgeon's Guild would commission a portrait by a leading portraitist of the period; Rembrandt was commissioned for this task when he was 26 years old, and newly arrived in Amsterdam. It was his first major commission in Amsterdam. Each of the men included in the portrait would have paid a certain amount of money to be included in the work, and the more
Nicolaes Tulp the condition we know as migraine, the devastating effects of tobacco smoking on the lungs, and reveals an understanding of human psychology in a description of the placebo effect. Tulp also discovered the ileocecal valve at the junction of the large and small intestines, still known as Tulp's valve. While Tulp made observations of various diseases, treatment often continued in the age-old way. His description of the symptoms of Beriberi in a Dutch seaman, for example, went unnoticed until the cause (vitamin B1 deficiency) was recognized two hundred years later by Christiaan Eijkman. Partially as a result of the success