Southard was more of a brain-spot man himself. The main mind-twist man at the time in US psychiatry was Adolf Meyer. I have several times pointed out the link between the theory of Adolf Meyer and critical psychiatry (eg. see previous post).
I think modern psychiatry needs to make more of the differentiation that Southard described. The way was lost when psychiatry thought there was a "twisted molecule behind every twisted thought", which is clearly wrong.
(1) Southard, E.E. (1914) The Mind Twist and the Brain Spot Hypotheses in Psychopathology and Neuropathology, Psychological Bulletin 11: 117-130