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What is schizophrenia?
Schizophrenia is a chronic, severe, and disabling brain disorder that has affected people throughout history. About 1 percent of Americans have this illness.1
People with the disorder may hear voices other people don't hear. They may believe other people are reading their minds, controlling their thoughts, or plotting to harm them. This can terrify people with the illness and make them withdrawn or extremely agitated.
People with schizophrenia may not make sense when they talk. They may sit for hours without moving or talking. Sometimes people with schizophrenia seem perfectly fine until they talk about what they are really thinking.
Families and society are affected by schizophrenia too. Many people with schizophrenia have difficulty holding a job or caring for themselves, so they rely on others for help.
Treatment helps relieve many symptoms of schizophrenia, but most people who have the disorder cope with symptoms throughout their lives. However, many people with schizophrenia can lead rewarding and meaningful lives in their communities. Researchers are developing more effective medications and using new research tools to understand the causes of schizophrenia. In the years to come, this work may help prevent and better treat the illness.
What are the symptoms of schizophrenia?
The symptoms of schizophrenia fall into three broad categories: positive symptoms, negative symptoms, and cognitive symptoms.
Positive symptoms are psychotic behaviors not seen in healthy people. People with positive symptoms often "lose touch" with reality. These symptoms can come and go. Sometimes they are severe and at other times hardly noticeable, depending on whether the individual is receiving treatment. They include the following:
are things a person sees, hears, smells, or feels that no one else can see, hear,
smell, or feel. "Voices" are the most common type of hallucination in schizophrenia. Many
people with the disorder hear voices. The voices may talk to the person about his or her behavior,
order the person to do things, or warn the person of danger. Sometimes the voices talk to each
other. People with schizophrenia may hear voices for a long time before family and friends
notice the problem.
Other types of hallucinations include seeing people or objects that are not there, smelling odors that no one else detects, and feeling things like invisible fingers touching their bodies when no one is near.
are false beliefs that are not part of the person's culture and do not change. The person
believes delusions even after other people prove that the beliefs are not true or logical. People
with schizophrenia can have delusions that seem bizarre, such as believing that neighbors can
control their behavior with magnetic waves. They may also believe that people on television are
directing special messages to them, or that radio stations are broadcasting their thoughts aloud to
others. Sometimes they believe they are someone else, such as a famous historical figure. They
may have paranoid delusions and believe that others are trying to harm them, such as by
cheating, harassing, poisoning, spying on, or plotting against them or the people they care about.
These beliefs are called "delusions of persecution."
are unusual or dysfunctional ways of thinking. One form of thought disorder
is called "disorganized thinking." This is when a person has trouble organizing his or her
thoughts or connecting them logically. They may talk in a garbled way that is hard to understand.
Another form is called "thought blocking." This is when a person stops speaking abruptly in the
middle of a thought. When asked why he or she stopped talking, the person may say that it felt as
if the thought had been taken out of his or her head. Finally, a person with a thought disorder
might make up meaningless words, or "neologisms."
may appear as agitated body movements. A person with a movement
disorder may repeat certain motions over and over. In the other extreme, a person may become
catatonic. Catatonia is a state in which a person does not move and does not respond to others.
Catatonia is rare today, but it was more common when treatment for schizophrenia was not
"Voices" are the most common type of hallucination in schizophrenia.
Negative symptoms are associated with disruptions to normal emotions and behaviors. These symptoms are harder to recognize as part of the disorder and can be mistaken for depression or other conditions. These symptoms include the following:
"Flat affect" (a person's face does not move or he or she talks in a dull or monotonous
Lack of ability to begin and sustain planned activities
Speaking little, even when forced to interact.
People with negative symptoms need help with everyday tasks. They often neglect basic personal hygiene. This may make them seem lazy or unwilling to help themselves, but the problems are symptoms caused by the schizophrenia.
Cognitive symptoms are subtle. Like negative symptoms, cognitive symptoms may be difficult to recognize as part of the disorder. Often, they are detected only when other tests are performed. Cognitive symptoms include the following:
Poor "executive functioning" (the ability to understand information and use it to make
Trouble focusing or paying attention
Problems with "working memory" (the ability to use information immediately after
Cognitive symptoms often make it hard to lead a normal life and earn a living. They can cause great emotional distress.
When does schizophrenia start and who gets it?
Schizophrenia affects men and women equally. It occurs at similar rates in all ethnic groups around the world. Symptoms such as hallucinations and delusions usually start between ages 16 and 30. Men tend to experience symptoms a little earlier than women. Most of the time, people do not get schizophrenia after age 45.3 Schizophrenia rarely occurs in children, but awareness of childhood-onset schizophrenia is increasing.4,5
It can be difficult to diagnose schizophrenia in teens. This is because the first signs can include a change of friends, a drop in grades, sleep problems, and irritability—behaviors that are common among teens. A combination of factors can predict schizophrenia in up to 80 percent of youth who are at high risk of developing the illness. These factors include isolating oneself and withdrawing from others, an increase in unusual thoughts and suspicions, and a family history of psychosis.6 In young people who develop the disease, this stage of the disorder is called the "prodromal" period.
Are people with schizophrenia violent?
People with schizophrenia are not usually violent. In fact, most violent crimes are not committed by people with schizophrenia.7 However, some symptoms are associated with violence, such as delusions of persecution. Substance abuse may also increase the chance a person will become violent.8 If a person with schizophrenia becomes violent, the violence is usually directed at family members and tends to take place at home.
The risk of violence among people with schizophrenia is small. But people with the illness attempt suicide much more often than others. About 10 percent (especially young adult males) die by suicide.9,10 It is hard to predict which people with schizophrenia are prone to suicide. If you know someone who talks about or attempts suicide, help him or her find professional help right away.
People with schizophrenia are not usually violent.
What about substance abuse?
Some people who abuse drugs show symptoms similar to those of schizophrenia. Therefore, people with schizophrenia may be mistaken for people who are affected by drugs. Most researchers do not believe that substance abuse causes schizophrenia. However, people who have schizophrenia are much more likely to have a substance or alcohol abuse problem than the general population.11
Substance abuse can make treatment for schizophrenia less effective. Some drugs, like marijuana and stimulants such as amphetamines or cocaine, may make symptoms worse. In fact, research has found increasing evidence of a link between marijuana and schizophrenia symptoms.12,13 In addition, people who abuse drugs are less likely to follow their treatment plan.
Schizophrenia and smoking
Addiction to nicotine is the most common form of substance abuse in people with schizophrenia. They are addicted to nicotine at three times the rate of the general population (75 to 90 percent vs. 25 to 30 percent).14
The relationship between smoking and schizophrenia is complex. People with schizophrenia seem to be driven to smoke, and researchers are exploring whether there is a biological basis for this need. In addition to its known health hazards, several studies have found that smoking may make antipsychotic drugs less effective.
Quitting smoking may be very difficult for people with schizophrenia because nicotine withdrawal may cause their psychotic symptoms to get worse for a while. Quitting strategies that include nicotine replacement methods may be easier for patients to handle. Doctors who treat people with schizophrenia should watch their patients' response to antipsychotic medication carefully if the patient decides to start or stop smoking.
What causes schizophrenia?
Experts think schizophrenia is caused by several factors.
Genes and environment
. Scientists have long known that schizophrenia runs in families. The
illness occurs in 1 percent of the general population, but it occurs in 10 percent of people who
have a first-degree relative with the disorder, such as a parent, brother, or sister. People who have
second-degree relatives (aunts, uncles, grandparents, or cousins) with the disease also develop schizophrenia more often than the general population. The risk is highest for an identical twin of a person with schizophrenia. He or she has a 40 to 65 percent chance of developing the disorder.15
We inherit our genes from both parents. Scientists believe several genes are associated with an increased risk of schizophrenia, but that no gene causes the disease by itself.16 In fact, recent research has found that people with schizophrenia tend to have higher rates of rare genetic mutations. These genetic differences involve hundreds of different genes and probably disrupt brain development.17
Other recent studies suggest that schizophrenia may result in part when a certain gene that is key to making important brain chemicals malfunctions. This problem may affect the part of the brain involved in developing higher functioning skills.18 Research into this gene is ongoing, so it is not yet possible to use the genetic information to predict who will develop the disease.
Despite this, tests that scan a person's genes can be bought without a prescription or a health professional's advice. Ads for the tests suggest that with a saliva sample, a company can determine if a client is at risk for developing specific diseases, including schizophrenia. However, scientists don't yet know all of the gene variations that contribute to schizophrenia. Those that are known raise the risk only by very small amounts. Therefore, these "genome scans" are unlikely to provide a complete picture of a person's risk for developing a mental disorder like schizophrenia.
In addition, it probably takes more than genes to cause the disorder. Scientists think interactions between genes and the environment are necessary for schizophrenia to develop. Many environmental factors may be involved, such as exposure to viruses or malnutrition before birth, problems during birth, and other not yet known psychosocial factors.
Scientists are learning more about brain chemistry and its link to schizophrenia.
Different brain chemistry and structure
. Scientists think that an imbalance in the complex,
interrelated chemical reactions of the brain involving the neurotransmitters dopamine and
glutamate, and possibly others, plays a role in schizophrenia. Neurotransmitters are substances
that allow brain cells to communicate with each other. Scientists are learning more about brain
chemistry and its link to schizophrenia.
Also, in small ways the brains of people with schizophrenia look different than those of healthy people. For example, fluid-filled cavities at the center of the brain, called ventricles, are larger in some people with schizophrenia. The brains of people with the illness also tend to have less gray matter, and some areas of the brain may have less or more activity.
Studies of brain tissue after death also have revealed differences in the brains of people with schizophrenia. Scientists found small changes in the distribution or characteristics of brain cells that likely occurred before birth.3 Some experts think problems during brain development before birth may lead to faulty connections. The problem may not show up in a person until puberty. The brain undergoes major changes during puberty, and these changes could trigger psychotic symptoms. Scientists have learned a lot about schizophrenia, but more research is needed to help explain how it develops.
Scientists have learned a lot about schizophrenia, but more research is needed to help explain how it develops.
How is schizophrenia treated?
Because the causes of schizophrenia are still unknown, treatments focus on eliminating the symptoms of the disease. Treatments include antipsychotic medications and various psychosocial treatments.
Antipsychotic medications have been available since the mid-1950's. The older types are called conventional or "typical" antipsychotics. Some of the more commonly used typical medications include:
In the 1990's, new antipsychotic medications were developed. These new medications are called second generation, or "atypical" antipsychotics.
One of these medications, clozapine (Clozaril) is an effective medication that treats psychotic symptoms, hallucinations, and breaks with reality. But clozapine can sometimes cause a serious problem called agranulocytosis, which is a loss of the white blood cells that help a person fight infection. People who take clozapine must get their white blood cell counts checked every week or two. This problem and the cost of blood tests make treatment with clozapine difficult for many people. But clozapine is potentially helpful for people who do not respond to other antipsychotic medications.19
Other atypical antipsychotics were also developed. None cause agranulocytosis. Examples include:
When a doctor says it is okay to stop taking a medication, it should be gradually tapered off, never stopped suddenly.
What are the side effects?
Some people have side effects when they start taking these medications. Most side effects go away after a few days and often can be managed successfully. People who are taking antipsychotics should not drive until they adjust to their new medication. Side effects of many antipsychotics include:
Atypical antipsychotic medications can cause major weight gain and changes in a person's metabolism. This may increase a person's risk of getting diabetes and high cholesterol.20 A person's weight, glucose levels, and lipid levels should be monitored regularly by a doctor while taking an atypical antipsychotic medication.
Typical antipsychotic medications can cause side effects related to physical movement, such as:
Long-term use of typical antipsychotic medications may lead to a condition called tardive dyskinesia (TD). TD causes muscle movements a person can't control. The movements commonly happen around the mouth. TD can range from mild to severe, and in some people the problem cannot be cured. Sometimes people with TD recover partially or fully after they stop taking the medication.
TD happens to fewer people who take the atypical antipsychotics, but some people may still get TD. People who think that they might have TD should check with their doctor before stopping their medication.
How are antipsychotics taken and how do people respond to them?
Antipsychotics are usually in pill or liquid form. Some anti-psychotics are shots that are given once or twice a month.
Symptoms of schizophrenia, such as feeling agitated and having hallucinations, usually go away within days. Symptoms like delusions usually go away within a few weeks. After about six weeks, many people will see a lot of improvement.
However, people respond in different ways to antipsychotic medications, and no one can tell beforehand how a person will respond. Sometimes a person needs to try several medications before finding the right one. Doctors and patients can work together to find the best medication or medication combination, as well as the right dose.
Some people may have a relapse-their symptoms come back or get worse. Usually, relapses happen when people stop taking their medication, or when they only take it sometimes. Some people stop taking the medication because they feel better or they may feel they don't need it anymore. But no one should stop taking an antipsychotic medication without talking to his or her doctor. When a doctor says it is okay to stop taking a medication, it should be gradually tapered off, never stopped suddenly.
How do antipsychotics interact with other medications?
Antipsychotics can produce unpleasant or dangerous side effects when taken with certain medications. For this reason, all doctors treating a patient need to be aware of all the medications that person is taking. Doctors need to know about prescription and over-the-counter medicine, vitamins, minerals, and herbal supplements. People also need to discuss any alcohol or other drug use with their doctor.
To find out more about how antipsychotics work, the National Institute of Mental Health (NIMH) funded a study called CATIE (Clinical Antipsychotic Trials of Intervention Effectiveness). This study compared the effectiveness and side effects of five antipsychotics used
to treat people with schizophrenia. In general, the study found that the older typical antipsychotic perphenazine (Trilafon) worked as well as the newer, atypical medications. But because people respond differently to different medications, it is important that treatments be designed carefully for each person. More information about CATIE is on the
Psychosocial treatments can help people with schizophrenia who are already stabilized on antipsychotic medication. Psychosocial treatments help these patients deal with the everyday challenges of the illness, such as difficulty with communication, self-care, work, and forming and keeping relationships. Learning and using coping mechanisms to address these problems allow people with schizophrenia to socialize and attend school and work.
Patients who receive regular psychosocial treatment also are more likely to keep taking their medication, and they are less likely to have relapses or be hospitalized. A therapist can help patients better understand and adjust to living with schizophrenia. The therapist can provide education about the disorder, common symptoms or problems patients may experience, and the importance of staying on medications. For more information on psychosocial treatments, see the on the NIMH website.
Illness management skills
. People with schizophrenia can take an active role in managing their
own illness. Once patients learn basic facts about schizophrenia and its treatment, they can make
informed decisions about their care. If they know how to watch for the early warning signs of
relapse and make a plan to respond, patients can learn to prevent relapses. Patients can also use
coping skills to deal with persistent symptoms.
Integrated treatment for co-occurring substance abuse
. Substance abuse is the most common
co-occurring disorder in people with schizophrenia. But ordinary substance abuse treatment
programs usually do not address this population's special needs. When schizophrenia treatment
programs and drug treatment programs are used together, patients get better results.
. Rehabilitation emphasizes social and vocational training to help people with
schizophrenia function better in their communities. Because schizophrenia usually develops in
people during the critical career-forming years of life (ages 18 to 35), and because the disease
makes normal thinking and functioning difficult, most patients do not receive training in the
skills needed for a job.
Rehabilitation programs can include job counseling and training, money management counseling, help in learning to use public transportation, and opportunities to practice communication skills. Rehabilitation programs work well when they include both job training and specific therapy designed to improve cognitive or thinking skills. Programs like this help patients hold jobs, remember important details, and improve their functioning.21,22,23
. People with schizophrenia are often discharged from the hospital into the
care of their families. So it is important that family members know as much as possible about the
disease. With the help of a therapist, family members can learn coping strategies and problem-
solving skills. In this way the family can help make sure their loved one sticks with treatment
and stays on his or her medication. Families should learn where to find outpatient and family
Cognitive behavioral therapy
. Cognitive behavioral therapy (CBT) is a type of psychotherapy
that focuses on thinking and behavior. CBT helps patients with symptoms that do not go away
even when they take medication. The therapist teaches people with schizophrenia how to test the
reality of their thoughts and perceptions, how to "not listen" to their voices, and how to manage
their symptoms overall. CBT can help reduce the severity of symptoms and reduce the risk of
. Self-help groups for people with schizophrenia and their families are
becoming more common. Professional therapists usually are not involved, but group members
support and comfort each other. People in self-help groups know that others are facing the same
problems, which can help everyone feel less isolated. The networking that takes place in self-
help groups can also prompt families to work together to advocate for research and more hospital
and community treatment programs. Also, groups may be able to draw public attention to the
discrimination many people with mental illnesses face.
Once patients learn basic facts about schizophrenia and its treatment, they can make informed decisions about their care.
How can you help a person with schizophrenia?
People with schizophrenia can get help from professional case managers and caregivers at residential or day programs. However, family members usually are a patient's primary caregivers.
People with schizophrenia often resist treatment. They may not think they need help because they believe their delusions or hallucinations are real. In these cases, family and friends may need to take action to keep their loved one safe. Laws vary from state to state, and it can be difficult to force a person with a mental disorder into treatment or hospitalization. But when a person becomes dangerous to himself or herself, or to others, family members or friends may have to call the police to take their loved one to the hospital.
Treatment at the hospital
. In the emergency room, a mental health professional will assess the
patient and determine whether a voluntary or involuntary admission is needed. For a person to be
admitted involuntarily, the law states that the professional must witness psychotic behavior and
hear the person voice delusional thoughts. Family and friends can provide needed information to
help a mental health professional make a decision.
After a loved one leaves the hospital
. Family and friends can help their loved ones get
treatment and take their medication once they go home. If patients stop taking their medication
or stop going to follow-up appointments, their symptoms likely will return. Sometimes
symptoms become severe for people who stop their medication and treatment. This is dangerous,
since they may become unable to care for themselves. Some people end up on the street or in jail,
where they rarely receive the kind of help they need.
Family and friends can also help patients set realistic goals and learn to function in the world. Each step toward these goals should be small and taken one at a time. The patient will need support during this time. When people with a mental illness are pressured and criticized, they usually do not get well. Often, their symptoms may get worse. Telling them when they are doing something right is the best way to help them move forward.
It can be difficult to know how to respond to someone with schizophrenia who makes strange or clearly false statements. Remember that these beliefs or hallucinations seem very real to the person. It is not helpful to say they are wrong or imaginary. But going along with the delusions is not helpful, either. Instead, calmly say that you see things differently. Tell them that you acknowledge that everyone has the right to see things his or her own way. In addition, it is important to understand that schizophrenia is a biological illness. Being respectful, supportive, and kind without tolerating dangerous or inappropriate behavior is the best way to approach people with this disorder.
People with schizophrenia can get help from professional case managers and caregivers at residential or day programs.
What is the outlook for the future?
The outlook for people with schizophrenia continues to improve. Although there is no cure, treatments that work well are available. Many people with schizophrenia improve enough to lead independent, satisfying lives.
Continued research and understanding in genetics, neuroscience, and behavioral science will help scientists and health professionals understand the causes of the disorder and how it may be predicted and prevented. This work will help experts develop better treatments to help people with schizophrenia achieve their full potential. Families and individuals who are living with schizophrenia are encouraged to participate in clinical research. For up-to-date information about the latest NIMH-funded research in schizophrenia, see
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SMU Medical Journal (Volume – 1, No. – 1, January 2014) Extra Esophageal Reflux Disease : An ENT Challenge Soumyajit Das1*, Suvamoy Chakraborty2 and Pronoti Sinha3 1Assistant Professor, Department of ENT and Head and Neck Surgery, SMIMS, Gangtok2Professor and Head,Department of ENT and Head And Neck SurgerySMIMS, Gangtok. 3Assistant ProfessorDepartment of Anatomy,SMIMS, Gangt
Experiment 2 2/1 Inorganic Chemistry II THE OXIDATION STATES OF VANADIUM References 1. Folder entitled "The Chemistry of Vanadium" on your bench. 2. Cotton and Wilkinson "Basic Inorganic Chemistry" sections 24-9 to 24-12. 3. Huheey, "Inorganic Chemistry" (3rd edition) Appendix F. 4. Shriver, Atkins, and Langford, "Inorganic Chemistry" chapter 8 Background