Writing a 4000 word essay related to Physiotherapy on the Physiology of any particular Pathology (e.g. quadriceps muscle rupture). Then choosing a therapeutic modality (such as Interferential Therapy or Ultrasound) and mentioning how it affects on the chosen pathology physiologically. Avoidance of the systematic review is compulsory. A discussion of the critique on the mechanism supported with evidence. The essay has to be discussive, not descriptive.