Inclusion Criteria for patient group:  Patients who will have cryoneurotomy as part of their standard treatment for spastic equinovarus foot in VGH spasticity multidisciplinary clinic Adults 18-70 years of age (male and female) Ability to attend testing sessions, comply with testing protocols and provide written informed consent. Able to understand and complete study-related questionnaires (must be able to understand and speak English or have access to an appropriate interpreter as judged by the investigator).  Inclusion Criteria for healthy participants:  Any healthy participants with the age between 18 to 70. Over 70 will be excluded due to the expected natural alterations in electrophysiological parameters Able to attend and comply with the testing protocols Able to provide informed written consent Able to understand and speak English or have access to an appropriate interpreter  Exclusion Criteria:  History of previous nerve procedures such as chemical neurolysis with alcohol, cryoneurotomy, any surgery of the tibial nerve. Any other neurological pathology different from that responsible for the spasticity.