Trichotillomania, also known as ttm, is related to chronic tic disorder and alexithymia. An important gene associated with Trichotillomania is SLITRK1 (SLIT And NTRK Like Family Member 1), and among its related pathways/superpathways are Transmission across Chemical Synapses and Neuroscience. The drugs Dopamine and Methylphenidate have been mentioned in the context of this disorder. Affiliated tissues include skin and brain, and related phenotypes are alopecia and hair-pulling