Significant tremor alleviation in the target hand ensued ( t(12) = 7.21, p < 0.001, two-tailed), which was strongly associated with the functional reorganization of the brain’s hand region with the cerebellum ( r = 0.91, p < 0.001, one -tailed). We used MRgFUS to produce small lesions in the thalamic ventral intermediate nucleus (VIM), an important node in the cerebello-thalamo-cortical tremor network, in 13 patients with tremor-dominant Parkinson’s disease or essential tremor. Sharper end points are the consequence of this difference.High-intensity Magnetic Resonance-guided Focused Ultrasound (MRgFUS) is a recent, non-invasive line of treatment for medication-resistant tremor.
14-5 The standard reagents in neutralization titrations are always strong acids or strong bases because the reactions with this type of reagent are more complete than with those of their weaker counterparts. 14-4 Temperature, ionic strength, and the presence of organic solvents and colloidal particles. This change corresponds to a pH range of ± 1 pH unit about the pK of the indicator. 14-3 The limited sensitivity of the eye to small color differences requires that there be a roughly tenfold excess of one or the other form of the indicator to be present in order for the color change to be seen. 14-2 Completeness of the reaction between the analyte and the reagent and the concentrations of the analyte and reagent. Thus, the curves become identical in this region. (b) Beyond the equivalence point, the pH is determined b the excess titrant. The equivalence point pH for the NH 3 solution will be well below 7, whereas for the NaOH solution it will be exactly 7. In contrast, additions of standard acid to the NaOH solution will cause the pH of the NaOH solution to decrease gradually and nearly linearly until the equivalence point is approached. With the first addition of titrant, the pH of the NH 3 solution will decrease rapidly and then level off and become nearly constant throughout the middle part of the titration. 14-1 (a) The initial pH of the NH 3 solution will be less than that for the solution containing NaOH.
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