Phenol nerve block for the management of lower limb spasticity

Abstract

Spasticity is defined as a motor disorder with failure to inhibit velocity-sensitive stretch reflexes leading to exaggerated muscle resistance. It is a cardinal feature of upper motor neuron lesions and can affect patients with congenital and acquired brain and spinal cord injuries of variable aetiologies (traumatic, vascular, neoplastic, and demyelination). The exact incidence and prevalence of spasticity are unknown. A consensus of experts in Britain believes it to be about 20% of stroke patients and 75% of patients with severe brain injury [1]. Spasticity varies in severity from muscle stiffness to severe, painful, and uncontrollable muscle spasms. Spasticity can be general, involving multiple limbs and trunk muscles, regional, affecting a group of muscles in one or more limbs, or focal, affecting a single muscle. Spasticity can affect the ability to feed and dress oneself, bladder and bowel control, hygiene, and mobility. It also predisposes to complications such as pressure sore formation due to poor seating / laying posture and contracture.