The Tingler (1959)

Vincent Price from the film, The Tingler, one of my favorite 1950s films. This diorama captures the moment when the Tingler is crawling up his arm and he begins his screaming.

Kit Maker: Monsters in Motion

From Wikipedia:

A pathologist, Dr. Warren Chapin (played by Vincent Price), discovers that the tingling of the spine in states of extreme fear is due to the growth of a “tingler”—a spinal parasite which can kill the host unless it is destroyed by screaming. An acquaintance of the pathologist, whose wife (Judith Evelyn) is mute and cannot scream, uses his discovery to frighten her to death. In an autopsy, Dr. Chapin removes the Tingler from the wife’s spine. The slug-like creature soon escapes, and mayhem ensues.