Title :
Paresthesia thresholds in spinal cord stimulation: a comparison of theoretical results with clinical data
Author :
Struijk, Johannes J. ; Holsheimer, Jan ; Barolat, Giancarlo ; He, Jiping ; Boom, Herman B K
Author_Institution :
Dept. of Electr. Eng., Twente Univ., Enschede, Netherlands
fDate :
6/1/1993 12:00:00 AM
Abstract :
The potential distributions produced in the spinal cord and surrounding tissues by dorsal epidural stimulation at the midcervical, midthoracic, and low thoracic levels were calculated with the use of a volume conductor model. Stimulus thresholds of myelinated dorsal column fibers and dorsal root fibers were calculated at each level in models in which the thickness of the dorsal cerebrospinal fluid (CSF) layer was varied. Calculated stimulus thresholds were compared with paresthesia thresholds obtained from measurements at the corresponding spinal levels in patients. The influences of the CSF layer thickness, the contact separation in bipolar stimulation and the laterality of the electrodes on the calculated thresholds were in general agreement with the clinical data
Keywords :
bioelectric potentials; neurophysiology; bipolar stimulation; cerebrospinal fluid layer thickness; contact separation; dorsal epidural stimulation; dorsal root fibers; electrode laterality; low thoracic level; midcervical level; midthoracic level; myelinated dorsal column fibers; paresthesia thresholds; potential distributions; spinal cord stimulation; stimulus threshold; volume conductor model; Biomedical measurements; Conductors; Contacts; Design methodology; Electrical stimulation; Electrodes; Helium; Impedance; Silicon compounds; Spinal cord;
Journal_Title :
Rehabilitation Engineering, IEEE Transactions on
