Eight-Channel Stimulator for Paraplegic Cycling
نویسندگان
چکیده
An eight-channel surface stimulation system, designed for paraplegic stepping was adapted for paraplegic cycling on a newly developed tricycle. The stimulation system consists of two four-channel modules an Inter Integrated Bus (I2C) to RS232 interface for direct stimulator control and data exchange and a standard laptop computer. A software package for personal computers with a comfortable graphical user interface allows evaluation and testing of complex stimulation patterns for cycling. Mechanical properties of the tricycle were investigated first in a simulation process and then in vitro on a multiply adjustable test bed. Static and dynamic measurements of the pedal forces and drive torques applied to the crank help to optimise the tricycle layout and the stimulation sequences. Standard hydrogel surface electrodes were applied to m. quadriceps, glutaeus maximus, hamstrings and peroneal reflex. A sensor reports the position and velocity of the crank to the laptop computer via RS232 port for calculation of velocity depending start and stop points for each stimulation channel.
منابع مشابه
Development of Paraplegic Leg Powered Cycling with the Lumbo- Sacral Anterior Root Stimulator Implant
In December 1994 a woman with a complete T9 spinal lesion had a 12-channel stimulator implanted with electrodes on the anterior L2 to S2 spinal roots bilaterally. Some restoration of cycling ability has already been demonstrated in [1] and [2]. She achieved leg powered cycling for 1.2km at a time using a recumbent tricycle in May 1998. The cycling system has since been developed further. Initia...
متن کاملNew controller for functional electrical stimulation systems.
A novel, self-contained controller for functional electrical stimulation systems has been designed. The development was motivated by the need to have a general purpose, easy to use controller capable of stimulating many muscle groups, thus restoring complex motor functions (e.g. standing, walking, reaching, and grasping). The designed controller can regulate the frequency, pulse duration, and c...
متن کاملA portable, 8-channel transcutaneous stimulator for paraplegic muscle training and mobility--a technical note.
This paper introduces an 8-channel transcutaneous neuromuscular stimulator, called ExoStim, which was designed and developed to provide stimulation to the lower-limb muscles of spinal cord injured individuals. The intended purposes of the ExoStim were to act as a skin-surface precursor to an implantable neuromuscular stimulator for the specific tasks of increasing paralyzed leg strength and end...
متن کاملModified Concept 2 Rowing Machine with Manual Fes Controller for Total Body Exercise in Paraplegia
Concept 2 indoor rowing machine (Concept 2 Inc., USA), an exercise and training machine for able-bodied population, was modified for total body exercise in paraplegia. A new seating system provides trunk stability and constrains the leg motion to the sagittal plane. A 4-channel electrical stimulator activates the quadriceps and hamstrings in drive and recovery phases of rowing cycle. Force sens...
متن کاملThe use of a four-channel electrical stimulator as an ambulatory aid for paraplegic patients.
This article reports the use of electrical stimulation to provide paraplegic patients with complete lesions of the spinal cord the ability to rise from sitting to standing, to maintain a standing position, and to walk with a reciprocal gait. Four channels of electrical stimulation are sufficient for synthesis of a simple reciprocal gait pattern in these patients. During the double-stance phase,...
متن کامل