Brain Mapping Techniques
- 1. BRAIN-MAPPINGTECHNIQUES Dr Neeta Gupta Associate Professor Positive Psychologist Certified Practioner of EFT(London) & CBT(Scotland) DAV PG College Dehradun
- 2. Importance of Brain Mapping Techniques: Brain measuring techniques are used 1.To explore electrical activities. 2.to show parts of the brain. It provides precise understanding of the anatomy/structure of the brain. 3.to explore the functions of different areas of Brain
- 3. It allows us to understand how a person learns? What happens to Hippocampus during memorization? What happens when a person behaves in strange manner Why is he feeling hungry, thirsty etc Why after an accident a person looses his vision or memory etc So Brain measuring technique tell us the mystries behind our each behaviour.
- 4. There are various techniques of Brain mapping and they are used depending upon the purpose of measurement.(Electrical Activity,Structure and Function) Some of the main techniques are as follows: 1. EEG: It is a method for measuring brain activity in which the electrical activity of brain is recorded from electrodes placed on a person’s scalp.
- 6. Patterns of Brain Activity
- 7. EEG is a better mapping device in showingWHEN brain activity occurs. It is not very accurate at indicating preciselyWHERE activity occurs. Few other techniques used to provide better spatial resolution than EEG are CT, MRI & PET.
- 8. 2. CT ( ComputerizedTomography): This procedure uses X rays to scan the patient’s head from many different angels. A computer then produces a two dimensional picture.
- 9. Difference between CT and MRI CT Scan produces results much faster than MRI. It is the preferred choice for doctors when making a diagnosis in an emergency. CT scan is cheaper than MRI CT scan produces radiation while MRI does not. MRI Uses Magnetism. . So MRI is safer because radiation can be harmful if frequently exposed. CT scan show bones also while MRI does not.
- 10. 3.MRI (Magnetic Resonance Imaging): It is a Brain mapping technique that uses magnetic fields to produce detailed images of the structure of the brain and other soft tissues. MRI provides static pictures and is very useful for looking at structures and abnormalities in structure such as when someone is injured. Its does not tell anything about activity just about structure.
- 12. 3. fMRI: It is the variation of MRI. It is a brain imaging technique that uses magnetic fields to produce detailed images of activity in areas of the brain and other soft tissues. Images from fMRI tell us where activity in the brain is occurring during particular tasks by tracking blood oxygen use in brain tissues.
- 16. 4.SQUID: Superconducting Quantum Interference Device It produces Images based on its ability to detect tiny changes in magnetic fields in the brain.When neurons fire, they create an electric current. Electric current,in turn, give rise to magnetic fields that the SQUID interpretes as neural activity. It is used to map various brain functions.
- 17. 5. PET scan (Positron Emission Tomography) : An imaging technique that detects the activity of the brain by measuring glucose utilization or blood flow. It scans to see what’s happening in the brain as it performs various functions. PET scan accomplishes this by measuring blood flow in various neural areas or by gauging the rate at which glucose, the brain’s fuel,is metabolized.
- 18. . Individuals are injected with small amounts of harmless radioactive isotopes attached to either water or glucose molecules. Blood flow is greatest in the most active areas of the brain. Similarly the most active cells taking in the greatest amount of glucose. The brighter the area the more the activity level.
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