However when drugs are discontinued, symptoms often return, suggesting the actual cause of the abnormality may not be purely biological. Factors that may affect nervous system functioning Genes Genes are inherited from parents. And, because it ignores a person's environment, it can miss seeing the whole person. Cluster B is composed of , , histrionic personality disorder, and. Moreover, most mental disorders are linked to abnormalities in many genes, rather than just one; that is, most are polygenetic.
There is also evidence for a genetic factor in causing psychological illness. This is meant to make the first phobia seem less fearsome etc. Also of importance to the neuron is the myelin sheath or the white, fatty covering which: 1 provides insulation so that signals from adjacent neurons do not affect one another and, 2 increases the speed at which signals are transmitted. Torrey found that the mothers of individuals with schizophrenia had contracted a specific strain of flu during pregnancy. The patient is believed to be cured when they can admit that which is currently being repressed.
I has been suggested that abnormality may be linked to genetics. For one thing, it ignores the profound effect environment can have on people. That is, people don't always know what is causing the problem because it's beyond their conscious mind. Of course, the environment may also lead to these disorders and so it is important to estimate the degree to which a disorder is due to genetic influences nature and the degree to which it is caused by the environment nurture. Chronic stress involves high levels of cortisol being produced by the adrenal cortex. Thus, there is nothing to be gained from searching for internal causes, either psychological or physical.
They act as the instructions to make proteins and it is estimated by the Human Genome Project that we have between 20,000 and 25,000 genes. Use this topic or order a custom research paper, written exactly how you need it to be. In other words, there are lots of dendrites but only one axon. Several perspectives models, approaches derived from data and theories attempt to explain the causes of abnormal behavior. Genes determine a lot of functions in our body, they determine hormone and various neurotransmitter levels.
The point where this occurs is called the synapse. It has several structures in common with all cells in the body. In this condition the psychiatrists only diagnosed 41 out of 193 patients as being mentally ill when in reality all patients were mentally ill. A final weakness is that the biological approach is reductionist. Another drawback of the biological model is that there is no way to know whether the biological signs of a mental disorder are the cause of the disorder or an effect of it. For example, unstable family structures, unhealthy behaviors of parents and peers, and cause individuals to participate in abnormal behavior.
Brain Structure and Chemistry 2. Behavioral Approach The behavioral approach to abnormal psychology is about the observable behaviors of the patient. Finally, the psychodynamic model is based on the theory that abnormal behaviors occur because of repressed or unmet. The Neuron The fundamental unit of the nervous system is the neuron, or nerve cell See Figure 2. The biggest contrasts would be the Biological model, and the other models.
The research achieved a high response rate from customers in the pharmacy. First, the frontal lobe contains the motor cortex which issues orders to the muscles of the body that produce voluntary movement. Hence, to reach -55mV and fire, it will need more than the normal gain of +15mV -70 to -55 mV. The axon terminals are the end of the axon where the electrical impulse becomes a chemical message and is released into the synaptic cleft which is the space between neurons. In particular strong evidence points to schizophrenia and bipolar depression as having a genetic explanation It has been demonstrated that first-degree relative of a person suffering schizophrenia have a 10% chance of developing the disorder. They would seek to either punish these behaviors or reward good behaviors, like when she socializes or gets up and goes to work.
Most report that their symptoms decline, leading them to feel better and improve their functioning. An example is that of enlarged ventricles. How does this cause a mental disorder? The topic of this article may not meet Wikipedia's. For example, someone like Percy might be given an antidepressant drug and might begin to feel better. The most common form of psychosurgery is a prefrontal lobotomy. Comparing identical twins with non-identical twins for rates of heritability can help answer the nature-nurture question.