Currently spasticity is a synonym of hypertonia and is located under the abnormal muscle physiology branch. In J:193310 the phenotype "hindlimb spasticity" is reported as a behavioral observation of mice with loss of 2 myelin proteins. Given that there is no assay of the muscle and the problem is in the nervous system, I'm uncomfortable with using the term hypertonia for this phenotype given its current location. I think we should consider separating spasticity from hypertonia and creating a new term under abnormal motor capabilities/coordination/movement for spasticity or else moving hypertonia to the behavior branch similar to the placement of paralysis. The HPO has both terms for hypertonia and (as a child of hypertonia) spasticity both located under the nervous system branch.