Methods, Systems, and Devices for Treating Nerve Spasticity

A system for treating a spasticity in a limb of a patient, the system comprising:

• a cryogenic cooling needle having a proximal end, a distal end, and a lumen therebetween, the needle configured for insertion within a target tissue proximate to a motor nerve associated with the spasticity in the limb of the patient by bending the needle outside a body of the patient to access the nerve along a plane of the target tissue, wherein the needle has varying stiffness at a proximal portion and a distal portion, wherein the motor nerve is in the limb of the patient;
• a cooling fluid supply lumen extending distally within the needle lumen to a distal portion of the needle lumen;
• and
• a cooling fluid source coupled to the cooling fluid supply lumen to direct cooling fluid flow into the needle lumen so that the cooling fluid vaporizes within the lumen to provide cooling to the motor nerve so as to treat spasticity.