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LOCALISATION OF CORTICAL
FUNCTION.
· The central core (brain stem)
· controls primitive behaviours eg sleeping, breathing
· controls involuntary behaviours eg sneezing.
· contains hypothalamus which regulates eating, drinking and
sex behaviours. The hypothalamus also ensures the body
maintains a constant physiological state.
· The limbic system.
· in the central core of the brain
· closely interconnected with the hypothalamus.
· contains the hippocampus which plays a part in memory.
· Cerebrum.
· contains; frontal lobe, parietal lobe, temporal lobe, occipital
lobe.…read more

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Parietal lobe contains;
· the motor area, responsible for controlling movements.
· the somatosensory area, responds to heat, cold, touch and
pain.
· Occipital lobe contains;
· the visual area, responsible for vision.
· Temporal lobe contains;
· the auditory area responsible for analysis of speech based
information, such as Wernickes and Brocha's aphasia.…read more

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METHODS OF STUDYING
CORTICAL FUNCTION.
· Neurosurgery. invasive, uses ablations and lesions to manipulate
the brain.
· Allows a great deal of specificity and control.
· Does lesioning one area of the brain cause damage to other areas?
· Electrical and chemical stimulation. invasive, Peter Milner, by
accidentally placing an electrode on a rat they found that the
limbic system is associated with pleasure. Wada test, chemical test
used to establish which cortical function is located to which
hemisphere of the brain.
· Stimulating the brain is less harmful procedure than surgery
therefore more ethical.
· Problems in extrapolating research on animals to humans.
· Post mortem studies. a study of the brain once a person has died
to determine the cause of some their behaviour.
· Provides a greater understanding of rare individual cases
· Obtaining a persons brain can be difficult.…read more

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Electroencephalogram (EEG) measures electrical activity in the
brain by recording signals sent by electrodes placed on the
individuals scalp can be done during sleep. have significantly
contributed to theories on sleep behaviour.
· No intervention is needed and therefore a natural assessment of
the brain is allowed.
· Electrodes aren't sensitive enough to pick out individual action
potentials of single neurons.
· Computerised axial tomography (CAT) an X ray beam sent
through the patients head to measure the amount of radiation.
This helps to locate tissue damage.
· Positron emission tomography (PET) measure levels of activity
in the brain by injecting radio active glucose into the brain. The
parts of the brain which are functioning, and need more energy,
requiring more blood will then have high levels of glucose, these
can then be detected.
· Magnetic resonance imaging (MRI) use strong magnetic fields
and radio waves to produce an image of a persons brain.
· Provides detailed knowledge of areas in the brain whilst they are
active.
· Time consuming.
· Some ethical issues (PET scans using radioactive glucose)…read more

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GENDER DEVELOPMENT.…read more

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Comments

shadoute

thank you SO much oh my god this is perfect

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