Final answer:
Johann Spurzheim and Franz Gall were important figures in the field of phrenology, a pseudoscience popular in the 19th century.
Step-by-step explanation:
Johann Spurzheim and Franz Gall were important figures in the field of phrenology, a pseudoscience popular in the 19th century. Phrenology claimed to be able to determine a person's character and mental abilities by examining the shape and size of their skull. Spurzheim and Gall developed theories and techniques that shaped the field of phrenology and influenced the study of the human brain.