Ways of investigating the brain 0.0 / 5 ? PsychologyBiopsychologyA2/A-levelAQA Created by: Charlie4555Created on: 13-06-17 12:13 What are the 4 ways of investigating the brain? fMRIs, EEG, ERPs, post-mortems 1 of 15 How does an fMRI work? Measures changes in brain activity during a task, measures changes in blood flow as if an area of the brain becomes more active it needs more oxygen 2 of 15 What are the 2 strengths of fMRIs? Non-invasive+no radiation so virtually risk free, produces images with very high spatial resolution=depicts detail by the mm 3 of 15 What are the 2 weaknesses of fMRIs? Overlooks the networked nature of brain activity+ignores communication, fMRI is exprensive compared to other neuroimaging techniques 4 of 15 What do EEGs do? Measure electrical activity via electrodes using a skull cap, electrical signals from diff electrodes are graphed over a period to make an EEG 5 of 15 What can EEGs detect? Neurological abnormalities such as epilepsy, tumours, Alzheimer's, and sleep disoders 6 of 15 What are the positive applications of EEGs? Positive applications, contributed much to our understanding of the stages in sleep, used to diagnose epilepsy 7 of 15 What is another strength of EEGs? High temporal resolution, can detect brain activity at a resolution of a single millisecond 8 of 15 What are the 2 weaknesses of EEGs? Generalised nature of info received=not useful for pinpointing exact source of neural activity, can only detect superficial activity 9 of 15 What are ERPs? Based off of data gathered in EEGs, isolate areas and discount any extraneous activity, specific responses stand out 10 of 15 What are the 2 strengths of ERPs? Limitations of EEGs partly addressed by ERPs+excellent temporal resolution, widespread use in measurement of cognitive functions such as the P300 11 of 15 What are the 2 weaknesses of ERPs? Superficial as it is based on EEG data, lack of standardisation in ERP methodology across diff studies 12 of 15 Why are post-mortems useful? Used to establish underlying neurobiology, usually used on people who had a rare disorder during life 13 of 15 What are the 2 strengths of post-mortems? Can study the brain in-depth in an ethical way, been vital in providing an understanding of key processes in the brain 14 of 15 What are the 2 weaknesses of post-mortems? Issue of consent of the deceased, retrospective data so cannot be followed up 15 of 15
Psychology - Biopsychology - Plasticity and the funcional recovery of the brain after trauma 1.0 / 5 based on 4 ratings
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