Question

Pick two of the following methods and briefly describe how they work. For each method that is chosen, include a description of a research question (real or hypothetical) for each method, and please explain why it why chosen. Be as descriptive as possible

Following methods to choose from: functional magnetic resonance imaging (fMRI) transcranial magnetic stimulation (TMS) electroencephalography (EEG) computed tomography (CT) diffusion tensor imaging (DTI)

Answer 1

Dear Student,

*✅ EEG is Electroencephalogram and it is a non invasive test.

It measures the electrical activity generated by neurons of the brain(brain waves).

During an EEG, small electrodes are attached to the patient's head, which detects the brain waves.

The voltage fluctuations measured by the electrodes used in this process are very small. So the obtained data will be digitalized and sent to the amplifier.

The amplified data from the EEG machine will be recorded on a graph paper in a wave form.

It has many uses like it is used to determine many neurological disorders like seizures.

EEG results can be interpreted by the type of waves obtained (like alpha, beta, gamma, delta which all are dependent on the frequencies)

*✅ CT scan is Computed Tomography.

This helps to diagnose different types of cancers.

Let us take an example of a patient who needs to get CT scan for abdomen. He needs to take barium meal before the procedure. It is done because the barium appears white on the scan.

The patient will lie down on the examination table ,which moves inside and the patient gets scanned. CT scan produce two dimensional image but the data obtained can also be used to construct three dimensional image .

Hope you are clear...

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