Lower limb spasticity (Human Phenotype Ontology entry HP_0002061) is spasticity (velocity-dependent increase in tonic stretch reflexes with increased muscle tone and hyperexcitable tendon reflexes) in the muscles of the lower limbs, hips, and pelvis. Also known as: Lower extremities spasticity, Lower extremity spasticity, Spastic lower extremities, Spastic lower extremity, Spastic lower limb, Spastic lower limbs, Spasticity in lower extremities, Spasticity in lower extremity.