They propose behaviour can be explained due to biological structures in the brain or hormonal activity. The PNS is made up of 31 spinal nerves which radiate out from the spinal cord and can be divided into the:. By using our website, you accept the fact that we use cookies. Nerve impulses then travel up the optic nerve to the thalamus and are then passed on to the visual cortex in the hindbrain. How Mad Are You? The overall effect of crossing time zones in this manner is that our body will feel as if it is daytime during the night, and that it is night-time during the day. This suggests a relationship between brain lateralisation and the immune system.

ERPS are of 2 types: On the other hand Miles et al demonstrated how a blind man who had a circadian rhythm of How Do I Decide? The pituitary is divided into the anterior and posterior. Everything you need to know about selling on Stuvia.

SamB9 Member since 2 year ago 8 documents sold. In truth our behaviour is much more complex and not so deterministic as such biological explanations propose.

For example, the case study of JW found that after a split-brain procedure he developed the ability to speak out of his right hemisphere which means that he can speak about information presented to either his left or his right visual field. Are You Good Or Evil? The adrenal medulla secretes the hormone adrenaline.

Melatonin and growth hormone also have a circadian rhythm with both peaking at midnight. Such studies are typical of the biological approach to understanding human behaviour. The way in which brain areas are connected with each other may be as important for normal cognitive function as particular brain sites themselves. Circadian rhythms will be disrupted as although our endogenous pacemakers stay the same, the exogenous zeitgebers patterns of light and dark in the new environment have changed.

Circadian Rhythm – Biological Rhythms – Paper 2 AQA Psychology

Tiredness during the new daytime and psychologg at night Decreased mental performance and lack of concentration Decreased physical performance Loss of appetite, indigestion and nausea Irritability, headaches and mental confusion The symptoms of Jet Lag are normally described as more severe when travelling in a West-East direction e.


Prepared for learning biological evidence 16 mark essay planner biological explanation of schizophrenia Official Essay Plan A5 Sheet For Homework Psychological explanations for schizophrenia ppt. Although this was traditionally associated with changes in childhood, recent research pacemakerrs that mature brains continue to show plasticity as a result of learning. However, this is not the case- they maintain a fairly regular pattern of sleeping and waking all year around.

endogenous pacemakers psychology essay

Cortisol plays a role in making us alert and explains why if awaken at 4am we struggle to think clearly. However this was a psuchology case study involving one individual and such generalisations may not apply to others due to individual differences. Both hemispheres have a motor cortex with each side controlling muscles on the opposite side of the body i.

Level of education associated with a more active, neurologically well-connected brain is positively correlated with speed of recovery from traumatic brain injuries. However, when asked to point at which lights had lit up they could do. Is your Brain Male or Female?

Michel Siffre spent 6 months in a cave without external cues and found his circadian rhythm varied from hours again highlighting the existence of an internal circadian clock. Discuss the role of endogenous pacemakers and exogenous zeitgebers in the control of a biological rhythm Essay Plan This is an essay plan for the essay title ‘Discuss the role of endogenous pacemakers and exogenous zeitgebers in control of a biological rhythm’, designed in a way that should make the material easy to remember.

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Endogenous Pacemakers and Exogenous Zeitgebers Essay Plan

Levels of gamma brain waves were far higher in the experienced meditation group both before and during meditation. The SCN has an inbuilt circadian firing pattern as when this has been damaged in rats, the circadian rhythm involving sleeping and feeding patterns has also been disrupted Zucker et al. This changing pattern of REM has led researchers to believe one function of REM is the growth and repair of the brain – needed a lot when young and less as we age.


endogenous pacemakers psychology essay

The fight or flight response including the role of adrenaline. Equipotentiality theory argues that although basic brain functions such as the motor cortex and sensory functions are controlled by localised brain areas, pacema,ers cognitive functions such as problem-solving and decision-making are not localised. Follow Me On Twitter: With their assistance, you can become well psychilogy and can avoid having to retake exams.

Patterns of light and darkness are registered by the retina, travel up the optic nerves to where these nerves join optic chiasmaand then pass into the suprachiasmatic nucleus SCN of endogwnous hypothalamus. Different areas of the motor cortex control different parts of the body and these are in the same sequence as in the body e. Composed of 2 parts:. The PNS is made up of 31 spinal nerves which radiate out from the spinal cord and can be divided into the:.

A-level Biological Psychology Revision for Paper 2 | Simply Psychology

Conclusion This shows that participants had seen the lights in both hemispheres but that material presented to the left eye could not be spoken about as the right hemisphere which receives information from the left eye has no language centre and thus cannot speak about the visual information it has received.

Due to the lab setting this may have low ecological as it is not indicative of real world settings for sleep behaviour. Such experimental studies are important however as they allow us to demonstrate causal relationships.