deletions | additions       diff --git a/Phenomenology.md b/Phenomenology.md  index fbcbb74..768e616 100644  --- a/Phenomenology.md  +++ b/Phenomenology.md 
...
### Sensory phenomena   In the last few years research has focused on the role of premonitory urges in TS since these urges are generally triggers for tics and are as bothersome as the tics themselves to many people. Premonitory urges have a sensory component and many TS patients also report sensory sensitivities. Researchers have been clarifying the nature of premonitory urges and determining attempting to determine  the underlying causes of the sensory sensitivities. Scores on the Premonitory Urge for Tics Scale (PUTS) and the University of São Paulo Sensory Phenomena Scale (USP-SPS) were significantly correlated with total tic severity, tic complexity and vocal tic scores for TS adults \citep{Kano_2015}. The PUTS and USP-SPS scores were also correlated with scores on the Dimensional Yale-Brown Obsessive-Compulsive Scale. This study provides additional evidence that the association between premonitory urges, as measured by PUTS scores, and tics is complex and may be influenced by obsessive-compulsive tendencies.