Structural MRI or other three-dimensional imaging provides an anatomical reference for aligning stimulation with a person’s cortical targets. The navigation system then relates coil position to that reference during stimulation, allowing researchers to position pulses with greater anatomical precision. This individualized alignment supports anatomically precise and reproducible targeting during mapping sessions.
Mapping depends on linking stimulation to a measurable change. For motor functions, investigators can examine task performance or evoked responses after targeted pulses; language mapping similarly uses changes in task performance. Comparing responses across cortical targets helps characterize functional organization while preserving an individual’s anatomical reference, making the resulting map specific to that person.
Tracking coil position helps relate each stimulation site to the intended anatomical target. That relationship matters because conclusions about cortical organization and connectivity depend on knowing where stimulation was delivered. Anatomically precise, reproducible positioning also makes responses easier to interpret across targets and supports individualized mapping rather than treating cortical anatomy as identical between people.
An nTMS workflow begins with structural MRI or another three-dimensional image that establishes the person’s anatomy. Researchers identify cortical regions of interest, align the stimulation system with that anatomy, and track coil position as pulses are delivered. They then evaluate task-performance changes or evoked responses to determine how targeted regions contribute to motor or language function.
nTMS can provide individualized motor or language maps that contribute to neurosurgical planning. Its value is greatest when the location of functional cortical regions needs to be considered alongside a person’s anatomy. By linking stimulation sites with task-performance changes or evoked responses, the technique supplies functional information that complements structural imaging during preparation for surgery.
Beyond surgical planning, the technique supports investigations of cortical organization and connectivity, because targeted stimulation can be paired with observed task changes or evoked responses. It also contributes to research on brain disorders and therapeutic neuromodulation. These uses extend nTMS from describing where functions are represented to examining how stimulation and functional responses can inform neuroscience studies.