Phrenologist Like Gall Believed That the Shape of Bumps on the Skull

Essay

 Phrenologist like Gall believed that the shape of bumps on the skull indicated differences in the function of the brain under that skull. While this has been discredited, there is evidence the impact to the skull and the resulting trauma of a concussion produces changes that are measurable. Explain whether this vindicates phrenology as a means to study brain dysfunction.