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Difference between revisions of "Trigeminal Nervous System Segmentation"
Trigeminal Nervous System Segmentation (view source)
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<translate>Considering the safety limits, the energy provided for each individual impulse in our application will follow this formula</translate>: | <translate>Considering the safety limits, the energy provided for each individual impulse in our application will follow this formula</translate>: | ||
<math>E=\bigtriangleup t =R \times I^2 \times \bigtriangleup t = 2.5 mJ </math>per impuls.[[File:Potenziale Evocato della Radice Trigeminale.jpg|thumb|'''Figure 4:''' By increasing the stimulus delivery, more fibers are gradually recruited until saturation.]] | <math>E=\bigtriangleup t =R \times I^2 \times \bigtriangleup t = 2.5 mJ </math>per impuls.[[File:Potenziale Evocato della Radice Trigeminale.jpg|thumb|'''<translate>Figure</translate> 4:''' <translate>By increasing the stimulus delivery, more fibers are gradually recruited until saturation</translate>.]] | ||
About the simultaneous use of the two electrostimulators — from the safety point of view — the limits turn out to have been 10 times lower than those indicated in the IEC legislation. | <translate>About the simultaneous use of the two electrostimulators — from the safety point of view — the limits turn out to have been 10 times lower than those indicated in the IEC legislation</translate>. | ||
The electrodes are arranged as | <translate>The electrodes are arranged as follows</translate>: | ||
* Cathode electrode has been placed on each side at 13–15 cm along the line conjoining the vertex - acoustic meatus in the bilaterally parietal region. | * <translate>Cathode electrode has been placed on each side at 13–15 cm along the line conjoining the vertex - acoustic meatus in the bilaterally parietal region</translate>. | ||
* The electrical stimulus consists of a square wave which length is 0.250 ms, at a voltage of 300 V and a maximum current of 100 mA. | * <translate>The electrical stimulus consists of a square wave which length is 0.250 ms, at a voltage of 300 V and a maximum current of 100 mA</translate>. | ||
Hence, the first procedure is to check the saturation of the motor response of the trigeminal root. | <translate>Hence, the first procedure is to check the saturation of the motor response of the trigeminal root</translate>. | ||
:At 20 mA, 30 mA, and 40 mA, we can observe a latency of 2.4 ms, 2.4 ms, and 2.3 ms respectively, but on increasing the amperage, we can observe a decrease in latency up to 2.1 ms at 50 mA, 2 ms at 70 mA, and 1.9 ms at 80 mA, 90 mA, and 100 mA ( | :<translate>At 20 mA, 30 mA, and 40 mA, we can observe a latency of 2.4 ms, 2.4 ms, and 2.3 ms respectively, but on increasing the amperage, we can observe a decrease in latency up to 2.1 ms at 50 mA, 2 ms at 70 mA, and 1.9 ms at 80 mA, 90 mA, and 100 mA</translate> (<translate>Figure</translate> 13). | ||
:These latency differences reach up to a maximum current density, depending on the capacitive components and resistance of the tissues to the current flow. | :<translate>These latency differences reach up to a maximum current density, depending on the capacitive components and resistance of the tissues to the current flow</translate>. | ||
The saturation of the electrophysiological signal evoked by the trigeminal root is the first absolute and mandatory step that needs to be performed, even before clinical interpretation. The saturation of the evoked potentials from the trigeminal root showed no change in amplitude. In fact, when the electrostimulator reaches 80 mA pulses, 90 mA, and 100 mA, the P-P amplitude stabilizes at 4.6 mV (Fig. 4). The amplitude value of 4.6 mV (of course, the amplitude can be chosen to the integral area or vice versa, depending on the purpose of the study) is to be considered the ‘''Maximum Absolute value of Neural Evoked Energy''’ from the trigeminal motor system. It is called '''‘<sub>m</sub>ANEE’'''. | The saturation of the electrophysiological signal evoked by the trigeminal root is the first absolute and mandatory step that needs to be performed, even before clinical interpretation. The saturation of the evoked potentials from the trigeminal root showed no change in amplitude. In fact, when the electrostimulator reaches 80 mA pulses, 90 mA, and 100 mA, the P-P amplitude stabilizes at 4.6 mV (Fig. 4). The amplitude value of 4.6 mV (of course, the amplitude can be chosen to the integral area or vice versa, depending on the purpose of the study) is to be considered the ‘''Maximum Absolute value of Neural Evoked Energy''’ from the trigeminal motor system. It is called '''‘<sub>m</sub>ANEE’'''. | ||