Figure-of-eight Coil Positioning
Figure-of-eight Coil Positioning - Related Videos
01:44
Rules for Significant Figures
0 Views •
2023
In any measurement, the precision of the measuring tool is an essential factor. An ordinary ruler, for example, can measure length to the closest millimeter; a caliper, on the other hand, can measure length to the nearest 0.01 mm. As a result, the caliper is a more precise measurement tool because it can measure extremely minute changes in length. The measurements will be more accurate if the measuring tool is more precise. It should be emphasized that when we represent measured values, the...
03:34
Uncertainty in Measurement: Significant Figures
0 Views •
2020
All the digits in a measurement, including the uncertain last digit, are called significant figures or significant digits. Note that zero may be a measured value; for example, if a scale that shows weight to the nearest pound reads “140,” then the 1 (hundreds), 4 (tens), and 0 (ones) are all significant (measured) values. A measurement result is properly reported when its significant digits accurately represent the certainty of the measurement process. Below are a set of rules to determine the...
01:44
Rules of Significant Figures
0 Views •
2023
In any measurement, the precision of the measuring tool is an essential factor. An ordinary ruler, for example, can measure length to the closest millimeter; a caliper, on the other hand, can measure length to the nearest 0.01 mm. As a result, the caliper is a more precise measurement tool because it can measure extremely minute changes in length. The measurements will be more accurate if the measuring tool is more precise. It should be emphasized that when we represent measured values, the...
00:58
Significant Figures in Calculations
0 Views •
2023
Uncertainty in measurements can be avoided by reporting the results of a calculation with the correct number of significant figures. This can be determined by the following rules for rounding numbers: When adding or subtracting numbers, round the result to the same number of decimal places as the number with the least number of decimal places. When multiplying or dividing numbers, round the result to the same number of digits as the number with the least number of significant figures. If...
07:00
How to Use the H1 Deep Transcranial Magnetic Stimulation Coil for Conditions Other than Depression
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Cited by 13 •
2017
The H1 deep transcranial magnetic stimulation coil is FDA-cleared for the treatment of depression. We demonstrate how to utilize the H1 for other conditions, such as auditory hallucinations and PTSD, by moving the helmet to different locations over the subject's skull.
FAQs
Angle and location change how the induced magnetic field reaches the intended cortical region. Small positioning adjustments can therefore alter both stimulation strength and focality, affecting which neural tissue receives the greatest influence. Maintaining a consistent angle and location is especially important when comparing brain excitability, motor responses, sensory effects, or functional connectivity across experimental sessions.
The adjacent loops produce a concentrated induced magnetic field near their intersection, making that region central to targeting. Aligning this intersection with the selected scalp location helps direct stimulation toward the intended cortical area rather than relying on coil placement alone. This concentration supports more precise comparisons between stimulation sites and observed neural or behavioral outcomes.
The distance between the coil and scalp influences the strength and focality of cortical stimulation. Increasing or varying that distance can change how effectively the induced field reaches the brain and how concentrated its effect remains. Controlling this positioning variable helps researchers distinguish genuine differences in brain responses from differences caused by inconsistent coil placement.
Begin by identifying the defined brain region and its corresponding scalp location, then place the coil so the intersection of its loops is aligned with that target. Set the intended orientation and maintain a consistent distance from the scalp. Rechecking location, angle, and spacing across trials or sessions improves the reproducibility of stimulation conditions.
This positioning approach is useful when researchers need to examine brain excitability, motor pathways, sensory pathways, or functional connectivity. It also supports studies linking a stimulation site to behavioral or physiological outcomes. Because placement affects stimulation characteristics, careful positioning helps make those relationships interpretable across participants, experimental conditions, and repeated measurements.
Accurate placement makes therapeutic protocols more consistent by helping deliver stimulation to the intended cortical region with comparable angle, location, and scalp distance. Greater consistency can reduce unwanted variation between sessions and improve interpretation of treatment-related outcomes. In research settings, it also helps investigators relate protocol conditions to changes in behavior or physiological measures.