Which one of the following statements about MEG and EEG is incorrect:

Question

BlackTom AI · Accepted Answer

Question restatement: The prompt asks which statement about MEG and EEG is incorrect, and provides four options to evaluate.
Option 1: 'MEG and EEG both measure aggregates of neuronal activity.' This is accurate. Both modalities record summed electrical or magnetic activity from populations of neurons, typically synchronized postsynaptic activity, rather than single-neuron activity.
Option 2: 'MEG signals have better source identification.' In many cases, MEG offers superior spatial specificity for cortical sources, especially for tangential currents, because magnetic fields are less distorted by the skull and scalp compared to electric potentials. This makes source localization more precise under certain conditions, so this statement is generally considered true.
Option 3: 'MEG signals are more susceptible to signal decays caused by increased sensor-to-brain distances.' This claim is questionable. While all signals decay with distance, EEG signals are strongly affected by skull and scalp conductivity, which can degrade spatial information and lead to greater attenuation with distance in the electric potential domain. MEG, being less affected by the conductive properties of the skull, tends to be less sensitive to distance-related decay than EEG. Therefore, describing MEG as more susceptible to distance-related decay is not correct.
Option 4: 'Both MEG and EEG use contactless sensors.' This is incorrect. MEG uses sensors (typically SQUID or other magnetometers) housed in a cryogenic sensor array that are not in direct contact with the scalp, but EEG requires electrodes placed on the scalp with conductive gel or paste—definitely contact-based. Thus, stating that both use contactless sensors is false.
In summary, option 3 contains a claim that contradicts the usual understanding of how distance effects differ between MEG and EEG, and option 4 contradicts the fundamental nature of EEG sensor contact. Options 1 and 2 accurately reflect common knowledge about MEG and EEG, while options 3 and 4 contain inaccuracies that make them incorrect interpretations of the modalities.

Which one of the following statements about MEG and EEG is incorrect:单项选择题

类似问题

An experienced neurologist could make a diagnosis for Alzheimer’s Disease based solely on comparison of a patient’s MRIs to the thousands of Alzheimer’s Disease patients' MRIs that that are available through a national database.

The need for liquid Helium in conventional MEG systems has some disadvantages. Which of the following statements is not one of them?

Compared to functional magnetic resonance imaging (fMRI), electroencephalography (EEG) has the advantage that...

Brian has crashed while riding his motorcycle. He is rushed to the local emergency room. If the doctors are concerned about brain damage, which of the imaging techniques would provide the most detail in terms of structural damage?

For this question, you will be matching different imaging methods with what information they provide. 1: MRI Scan 2: fMRI 3: PET Scan 4: CT Scan

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单