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Paper 2 Alevel psychology AQA

0.07MB. 0 audio & 1 images. Updated 2019-03-17.
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Paper 2 A level psychology

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Front Evaluate Plasticity and functional recovery of the brain
Back Strength plasicity and recovery research have real life application:Understanding the processes of plasticity has contributed to the field of neuralrehabillitation. Technicques included--> Movement therapy and Electracal stimulation of the brain, designed to counter the defects of a stroke.EVALUATION: This show's that all though the brain has the capacity to fix itself, to a point it requires further intervention for it to be successful. Limitation: Neural plasticity has potentially negative consequences:The brains abillity rewire itself, can have negative consequences for example: Prolonged drug use can result in poorer cognative functioning and increase the risk of dementia. Also 60-80% of amputees experience phantom leg syndrome, is thought to be due to the reorganisation of the somatosensory cortex. EVALUATION:  such evidence suggests that structural and physical processess invololved in functional recovary may not always be beneficial Limitation: Relatonship between age and neural plasticity is complex:Widely believed that neural plasticity works better in childhood, as children have a greater propensity to rewire their brain. -----> However Bezzola et al, demonstrated how golf training changed the neural representation on movement in adults aged 40-60 years old. EVALUATION This shows that neural plasticity can occour throughout lifespan. Strength: Further support of animals with neural plastcity: Hubel and Wiesel, sewed one eye of a cat shut, and analysed the brains cortical responses. The area of the corex associated with the shut eye was not idle but processed information from the one eye. EVALUATION: This study shows that a loss of function will lead to compensatory activity --> Evidence of neural plasticity. 
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Front Evaluate FMRI's
Back Strength: Non-invasive:Unlike other types of scanning, FMRI doesn't require the use of radition so is completely safe. ---> ANOTHER STRENGTH: Is it produces images with high spatial resoultion, showing detail by the millimetre. This means fMRI can provide a clear image of brain activity is localised Limitation:fMRI is expensive: Is expensive compaired to other and unlike other techniques they can only capiture a clear image if the person stays still. ---> ANOTHER WEAKNESS: poor temporal resoultion, 5 second time lag between initial neural activity and brain image 
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Front Explain the structure and function of the Cenral nervous system:
Back --> Consists of the brain and The Spinal Cord 1. The brain is the center of all conscious awarness ------> The Cerbal Cortex is highly developed and is what distingishes us from other animals. 2. The Spinal cord is an extention of the brain and is responsible for reflex actions. ------> It passes messeges to and from the brain and connects the brain with the Perphiral nervous system(PNS)
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