ailments or can used in other applications other than scs procedures such as peripheral nervous system stimulation sacral root stimulation and brain tissue stimulation including cortical and deep brain stimulation in the latter case the stimulation leads 102 104 can be delivered through a miniature cranial burr hole into the brain tissue the primary stimulation lead 102 comprises an elongated sheath body 112 having a proximal end 114 and a distal end 116 the sheath body 112 is composed of a suitably flexible material such as polyurethane silicone etc which may either be resilient or non resilient and may be formed via an extrusion process or by any other suitable means the distal end 116 of the sheath body 112 is soft and tapered to prevent injury to nerve roots that exit the spinal cord when delivered into the epidural space of the patient 39 s spine in the illustrated embodiment the sheath body 112 is cylindrically shaped and sized to fit through a touhy like needle not shown in this case the diameter of the sheath body 112 is preferably less than 5 mm to allow it to be percutaneously introduced through a needle more preferably the diameter of the sheath body 112 is within the range of 1 mm to 3 mm so that the primary stimulation lead 102.