scholarly journals Intra-epidermal evoked potentials: A promising tool for spinal disorders?

2021 ◽  
Author(s):  
Robin Lütolf ◽  
Sara U. Júlio ◽  
Martin Schubert ◽  
Michèle Hubli
Keyword(s):  
Evoked Potentials ◽  
Spinal Disorders ◽  
Promising Tool

2-28-01 A new technique of motor evoked potentials applied to patients with various cortico-spinal disorders

1997 ◽  
Vol 150 ◽  
pp. S108
Author(s):  
M.R. Magistris ◽  
K.M. Rösler ◽  
A. Truffert ◽  
Ch.W. Hess ◽  
T. Landis
Keyword(s):  
Evoked Potentials ◽  
Motor Evoked Potentials ◽  
New Technique ◽  
Spinal Disorders ◽  
A New Technique

scholarly journals Independent Component Decomposition of Human Somatosensory Evoked Potentials Recorded by Micro-Electrocorticography

2017 ◽  
Vol 27 (04) ◽  
pp. 1650052 ◽  
Author(s):  
Irene Rembado ◽  
Elisa Castagnola ◽  
Luca Turella ◽  
Tamara Ius ◽  
Riccardo Budai ◽  
...  
Keyword(s):  
Evoked Potentials ◽  
Somatosensory Evoked Potentials ◽  
Temporal Dynamics ◽  
Signal To Noise Ratio ◽  
Tumor Resection ◽  
Electrode Array ◽  
Independent Component ◽  
Source Analysis ◽  
Promising Tool ◽  
Median Nerve Stimulation

High-density surface microelectrodes for electrocorticography (ECoG) have become more common in recent years for recording electrical signals from the cortex. With an acceptable invasiveness/signal fidelity trade-off and high spatial resolution, micro-ECoG is a promising tool to resolve fine task-related spatial-temporal dynamics. However, volume conduction — not a negligible phenomenon — is likely to frustrate efforts to obtain reliable and resolved signals from a sub-millimeter electrode array. To address this issue, we performed an independent component analysis (ICA) on micro-ECoG recordings of somatosensory-evoked potentials (SEPs) elicited by median nerve stimulation in three human patients undergoing brain surgery for tumor resection. Using well-described cortical responses in SEPs, we were able to validate our results showing that the array could segregate different functional units possessing unique, highly localized spatial distributions. The representation of signals through the root-mean-square (rms) maps and the signal-to-noise ratio (SNR) analysis emphasizes the advantages of adopting a source analysis approach on micro-ECoG recordings in order to obtain a clear picture of cortical activity. The implications are twofold: while on one side ICA may be used as a spatial-temporal filter extracting micro-signal components relevant to tasks for brain–computer interface (BCI) applications, it could also be adopted to accurately identify the sites of nonfunctional regions for clinical purposes.

Motor evoked potentials: appropriate positioning of recording electrodes for diagnosis of spinal disorders

1995 ◽  
Vol 4 (3) ◽  
pp. 180-185 ◽  
Author(s):  
J. Chomiak ◽  
J. Dvorak ◽  
J. Antinnes ◽  
A. Sandler
Keyword(s):  
Evoked Potentials ◽  
Motor Evoked Potentials ◽  
Spinal Disorders ◽  
Recording Electrodes

Practical applications of scanning tunneling microscopy

1989 ◽  
Vol 47 ◽  
pp. 18-19
Author(s):  
D. R. Denley
Keyword(s):  
High Resolution ◽  
Scanning Tunneling Microscopy ◽  
Quantitative Information ◽  
Digital Data ◽  
Scanning Tunneling ◽  
Ambient Atmosphere ◽  
Tunneling Microscopy ◽  
Clear Trend ◽  
Practical Applications ◽  
Promising Tool

Scanning tunneling microscopy (STM) has recently been introduced as a promising tool for analyzing surface atomic structure. We have used STM for its extremely high resolution (especially the direction normal to surfaces) and its ability for imaging in ambient atmosphere. We have examined surfaces of metals, semiconductors, and molecules deposited on these materials to achieve atomic resolution in favorable cases.When the high resolution capability is coupled with digital data acquisition, it is simple to get quantitative information on surface texture. This is illustrated for the measurement of surface roughness of evaporated gold films as a function of deposition temperature and annealing time in Figure 1. These results show a clear trend for which the roughness, as well as the experimental deviance of the roughness is found to be minimal for evaporation at 300°C. It is also possible to contrast different measures of roughness.

Sign in / Sign up

Export Citation Format

Share Document