Title :
Signal strength versus cuff length in nerve cuff electrode recordings
Author :
Andreasen, Lotte N S ; Struijk, Johannes J.
Author_Institution :
Center for Sensory Motor Interaction, Aalborg Univ., Denmark
Abstract :
When a nerve cuff electrode is used for the recording of signals from peripheral nerves, cuff dimensions have to be chosen. Traditionally, the peak-to-peak amplitude of the single-fiber action potential (SFAP) is optimized through the choice of cuff diameter and cuff length. In this paper, the dependency of the root-mean-square (RMS) value of the nerve signal on the cuff dimensions was studied and compared with the peak-to-peak value of the SFAP. A simple approximation for signal optimization by cuff dimensioning is suggested. The results were obtained from modeled SFAPs and from the electroneurogram (ENG) created by superimposed SFAPs, obtained from an inhomogeneous volume conductor model. The results show that the RMS value of the nerve signal is considerably more sensitive to the cuff length than the SFAP peak-to-peak amplitude, and that the RMS of the ENG is a linear function of the fiber diameter.
Keywords :
bioelectric potentials; biomedical electrodes; neurophysiology; optimisation; physiological models; cuff dimensioning; cuff length; electrodiagnostics; electroneurogram; fiber diameter; inhomogeneous volume conductor model; linear function; nerve cuff electrode recordings; nerve signal RMS value; peak-to-peak value; root-mean-square value dependency; signal optimization; signal strength; Animals; Biomedical electrodes; Conductors; Extracellular; Helium; Humans; Neurofeedback; Noise level; Noise reduction; Petroleum; Action Potentials; Computer Simulation; Electrodes, Implanted; Electrophysiology; Equipment Design; Models, Neurological; Models, Theoretical; Neural Conduction; Reproducibility of Results; Sensitivity and Specificity;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2002.800785
