What is a pro of D waves compared to myotomal recordings of tcMEPs?

The advantage of D waves compared to myotomal recordings of transcranial motor evoked potentials (tcMEPs) is that D waves result in less patient movement. D waves are direct cortical responses generated by stimulating the motor cortex, leading to a more focused and localized motor response. This reduces the variability associated with patient movements during the recording process, as these waves can provide clearer signals with less influence from muscular contractions triggered by unintended movements.

In contrast, myotomal recordings often incorporate widespread muscular responses that can be influenced by the patient's ability to follow instructions or remain still, resulting in potential artifacts or noise in the signal. Maintaining patient stillness is crucial for accurate readings, so the reduced patient movement associated with D waves simplifies the technical challenges and improves the accuracy of the data collected.

Other options may have merits in specific contexts, but they do not directly address the point of reduced patient movement in the same way. Therefore, the emphasis on patient stillness as a pro of D waves highlights the practical advantages in a clinical or research setting.