Explain and evaluate how electrical and neurochemical activity of the brain is related to behaviour
In order for the brain to function correctly in an effective and efficient way it relies on the support from nerve cells that are responsible for the relay of vital information to and from the brain. This information is required to help us know how to feel, behave and perform depending on the different situations. Therefore the circuit of neurons or nerve cells develop a system where they process the information from cell to cell via the synapse eventually leading to the brain which controls how we behave and feel. This system is based on electrical and neurochemical activity performed by the brain. Presynaptic cells release chemicals known as neurotransmitters into synapses, which allow an electrical or chemical signal to pass to another cell. These signals eventually travel their way to the brain via the central nervous system, where in turn the brain releases a message that directs the body on how to deal or cope with the stimulus. There are many known diseases that can influence this process causing neurological problems, amongst drug abuse, alcoholism and brain damage is illnesses that are degenerative diseases that cause damage to the nerve cells which in turn leads to behavioural and psychiatric problems, one of these being Alzheimer’s disease (Alzheimer 1907). Alzheimer’s is the result of decreased brain size which occurs when a huge portion of nerve cells die and the tissue in the brain reduces in size. The detoriation and reduced levels of the nerve cells means that nerves are not able to respond as well as they should be able too. This in turn causes chemical disruption which then slows down the transmission of chemical impulses. Alzheimer’s affects the different areas of the brain. It causes the cortex to shrivel up which damages areas required for thinking, planning and remembering. It causes the hippocampus to also shrink which is required to help...
References: Andrews Tina, What Body Systems are affected by Alzheimer’s Disease, March 2011
Behavioural and Psychiatric symptoms of Alzheimer’s Disease, Alzheimer’s Association, March 2008
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