Processes of the Brain
How Messeges Are Sent
Messages which direct many functions throughout the body travel throuhg your brain cells. 1.Electrical currents send messages through a gap inbetween the two cells called the synapse. 2. Neurotransmitters help the signal cross this gap.3. Once the neurotransmitter has transported the signal it is reabsorbed into the end of the sending cell.
Dopamine and serotonin are two of the most important neurotransitters as they control a vast amount of our body and function which is why it is dangerous to mess around with drugs. Dopamine controls our perception and movement and seritonin controls our mood.
The brains natural form of anxiety releif. It reacts with GABA receptors and opens a channel into the cell. This increass the flow of chloride irons into the neuron making it harder for the neuron to be stimulated and slowing down your activity.
Used to combat systems of schizophrenia. They block the action of the neurotrasmitter dopamine in the brain by binding to, but not stimulating, dopamine receptors.
- Side effects such as 'tardive dyskinesia' - involuntary movements of the mouth and tounge.
Act by only temporarilyl occupying dopamine receptors and then rapidly dissociating to allow normal dopamnie transmission.
Depression is linked to low levels of seritonin in the nerve endings which impairs communication between cells.
The drugs called SSRI block the reaobsortion of the serotonin and as it builds up in the synapse communications can resume.
Enhance the action of GABA by binding to sites on GABA receptors and boosting its action. This allowes - even more - chloride irons to enter the cell making it - even more - resistant to excitation. As a result the brain sends out less excitatory neurotransmitters making you calm.
Bind to receptors on the heart and other organs associated with arousal during the acute response to stress and reduce the activity or adreniline and noradreniline. This makes it harder to stimulate the cells so the hearts beats slower and blood pressure falls leaving the individual calm and less anxious.