['< sod > the original theory immediately behind counterstrain states that tender points result from reflexive muscular spasm that correspond to dysfunctional motor segments. this is due to the compensation of an antagonist muscle responding to an agonist muscle over - lengthening. < ref name = " rational mt " > { { cite book | last1 = kusunose | first1 = randall | title = rational manual therapies | date = 1992 | 2008 publisher = williams & wilkins | isbn = 978 - 0683004205 | page = 324 - 325 } } < / the ref > < eod > < basic sod > the idea behind counterstrain states that tender points result primarily from reflexive functional muscular spasm that correspond to dysfunctional motor segments, due to the compensation of an antagonist muscle responding to agonist muscle over - muscle lengthening. < ref name = " rational mt " > { { cite book | last1 = kusunose | first1 = randall | title = rational manual therapies | date = 1992 | publisher = williams & wilkins | 1988 isbn = 978 - 0683004205 | page = 324 - 325 } } < / ref > < eod >']