This research by Mr. Broca is important to the history of psychology. Although phrenology was found to be faulty logic, the idea that the brain had sections for respective functions would be proven semi-true. Phrenology believed that it was the shape of the brain/head that would determine characteristics and traits. Broca's area discovered that there were areas of the brain that controlled different mental and physical functions. This would influence research in neuroscience and psychology. This influence would aid psychologists and neurologists with identifying prognosis for mental or physical deficiencies caused by the damage to the brain.

The frontal convolutions were entirely destroyed which explained his loss of speech. This damaged area would be identified as Broca's area, responsible for language and speech.

Tan's intelligence was decreased but he was still able to understand and communicate using gestures.

Mr. Broca would see Tan and study that he was fully coherent and could use the still abled parts of his body cognitively.

Tan had slowly been losing physical functions and muscle movements. His intelligence was also documented to have decreased. Despite being perfectly fine at the beginning of his hospitalization.

Mr. Broca's patient, Tan, had lost the use of speech. Tan's bodily function and mental functions were studied/documented for almost 30 years.