Which patient was Broca's hypothesis tested on?

Broca's hypothesis was tested on the patient known as Tan. This case is significant in the history of neurology and speech science because Tan, who had significant speech production difficulties, presented with a very limited vocabulary and could only say the word "tan." Despite this impairment, his comprehension remained intact. This case led to the exploration of the relationship between brain function and language, notably linked to the left frontal lobe, where Broca's area is located. The observations made from Tan’s condition supported Broca’s findings about the specific role of this brain region in language production, establishing a crucial connection between neurology and linguistics.