Tracy Cameron

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OBJECT The purpose of this report was to examine the available literature to determine the safety and efficacy of spinal cord stimulation (SCS) for the treatment of chronic pain of the trunk and limbs. METHODS The author identified 68 studies that fulfilled the efficacy inclusion/exclusion criteria, grouped on the basis of pain indication, with an overall(More)
We describe the design, fabrication, and output capabilities of a microminiature electrical stimulator that can be injected in or near nerves and muscles. Each single-channel microstimulator consists of a cylindrical glass capsule with hermetically sealed electrodes in either end (2-mm diameter x 13-mm overall length). Power and digital control data can be(More)
Chronic foreign-body responses and muscular changes were examined following the implantation of active miniature stimulators into the hind limb muscles of cats for periods of up to three months. The radio-frequency (RF)-powered stimulators were injected into muscles through a 12-gauge hypodermic needle. The tissue responses around the active stimulators(More)
Objective. To examine the importance of posture on the efficacy of spinal cord stimulation in a population of chronic pain patients previously implanted with a spinal cord stimulator. Materials and Methods. Electrode leads (Octrode 2098, ANS) were placed percutaneously into the epidural space under fluoroscopic control (BV29, Phillips, Inc.) at either the(More)
The objective of this study was to examine the programming strategies used in patients with intractable low-back pain treated with epidural spinal cord stimulation (SCS) utilizing paddle electrodes and a radio frequency (RF) stimulator. Programming strategies were examined in a group of patients implanted with a 16-contact paddle electrode and a dual(More)
The effects of placement of a miniature implantable stimulator on motor unit recruitment were examined in the posterior head of cat biceps femoris. The implantable stimulator (13-mm long x 2-mm diameter) was injected either proximally near the main nerve branch, or distally near the muscle insertion, through a 12-gauge hypodermic needle. Glycogen-depletion(More)
The purpose of this study was to explore the possibility of using electrocorticographic (ECoG) recordings from subdural electrodes placed over the motor cortex to identify the upper limb motion performed by a human subject. More specifically, we were trying to identify features in the ECoG signals that could help us determine the type of movement performed(More)
BACKGROUND Spinal cord stimulation devices provide a means of creating an electric field. The parameters used to produce this electric field are: pulse amplitude, pulse width (Pw), and pulse frequency (F). AIMS The purpose is to document the effects that the various stimulus parameters have on patient perception of paresthesia and the relationship that(More)
Intrathecal drug therapy has become an indispensable tool in the treatment of many different neurologic disorders. It allows targeted infusion of small quantities of drugs, thereby increasing effectiveness while reducing unwanted side effects typically seen in oral drug administration. The following paper discusses the current technology in constant rate(More)