Technology In Investigating Cognitive Processes

Natalie Drossoyianni I.B 1
Psychology HL

Discuss the use of technology in investigating cognitive processes.

Technology has been very useful for the past few years in investigating cognitive process. With the use of neuro-imaging techniques, researchers can examine brain structure and function, and thus understand better the relationship between cognition and physiology. The basic neuro-imaging techniques are the PET, the MRI, and THE fMRI scan.
The PET or else the positron emission tomography is used to detect brain tumors or memory disorders caused by the Alzheimer’s disease. This is done through measuring brain functions such as glucose consumption and blood flow. By identifying the cellular level metabolic changes in an organ or
Through the PET scan they found that people who had reduced cellular metabolism in the region of the hippocampus were associated with the Alzheimer’s disease. One of the researchers of team argues that the results should be replicated; however, a great advantage of this new brain imaging technique could be very useful to detect and prevent the Alzheimer’s disease.
Another very useful brain imaging technique is the MRI, or in other words, the magnetic resonance imaging technique. This technique offers a three dimensional picture of the brain and it works by detecting changes in the use of oxygen in the blood by magnetic fields and radio waves. When the use of oxygen is high in one area it means that this particular area is more active. This technique is vaguely used to see what areas of the brain are active when people perform various cognitive
When the patient was 9 years old he had a severe head injury which resulted to several epileptic seizures. At the time there was no drug for these epileptic seizure, thus the doctors performed a surgery to stop the seizures. During the surgery they removed tissue from the temporal lobe, including the hippocampus. Following the surgery, HM could recall information he had acquired in his early life, but was unable to form new ones. He suffered from anterograde amnesia. He was unable to remember faces or even carry on a normal conversation. The patient was studied for 44 years before he was put to an MRI scanner in 1997 and immediately things became clearer. The brain damage was larger than the researcher had estimated. It included the hippocampus, the amygdala and other areas close to the amygdala. The HM case study’s findings are valid since they are scientifically proven by the MRI scan. However, the study cannot be replicated to other humans to test its validity.
Finally, there is the fMRI, or else; the functional magnetic resonance imaging technique. They way it works and its results are the same with the MRI however, there is a slight difference between the two; the fMRI focuses on the function of the