Instruct: Given a question, retrieve passages that can help answer the question.
Query: Are hallucinations common on schizophrenia?
Hallucinations of pain and touch are very rare in schizophrenic disorders but 20% of patients with schizophrenia experience some sort of tactile hallucinations along with visual and auditory hallucinations. The most common tactile hallucination in patients with schizophrenia is a sensation in which a patch of their skin is stretched elastically across their head. They vary in intensity, range and speed at which they feel this stretching painful sensation. They are usually triggered by emotional cues such as guilt, anger, fear and depression. Other types of tactile hallucinations takes on a sexual form in patients with schizophrenia. Patients with schizophrenia may sometimes experience the feeling of being kissed or the feeling of someone lying by their side in response to their emotion of being lonely. Additionally, they occasionally hallucinate the feeling of small animals such as snakes crawling over their body. Such vivid tactile sensation of an object that is not present results from the unsuccessful attempt of the brain trying to perceive objects that are novel and that represent unreal situations usually triggered by guilt and fear. Patients with schizophrenia also have a hard time portraying emotions as they divert most of their energy to control the pain from their tactile hallucinations.
It is possible for schizophrenia to develop at any age, but it mostly happens to people within the ages of 16–30 (generally males aged 16–25 years and females 25–30 years); about 75 percent of people living with the illness developed it in these age-ranges. There is a likelihood of children developing schizophrenia, though it is quite rare before the age 12. Also, new cases are uncommon after age 40. In addition, about 1 percent of the world's population will develop schizophrenia over their lifetime, therefore out of all the people born, 1 in 100 will develop schizophrenia by age 55. There is on average a somewhat earlier onset for men than women, with the possible influence of the female sex hormone estrogen being one hypothesis and socio-cultural influences another.
In 1908, Eugen Bleuler introduced the term ""schizophrenia"" to represent a revised disease concept for Emil Kraepelin's "dementia praecox." Whereas Kraepelin's natural disease entity was anchored in the metaphor of progressive deterioration and mental weakness and defect, Bleuler offered a reinterpretation based on dissociation or "splitting' ("Spaltung") and widely broadened the inclusion criteria for the diagnosis. A review of the "Index medicus" from 1903 through 1978 showed a dramatic decline in the number of reports of multiple personality after the diagnosis of schizophrenia became popular, especially in the United States. The rise of the broad diagnostic category of dementia praecox has also been posited in the disappearance of "hysteria" (the usual diagnostic designation for cases of multiple personalities) by 1910. A number of factors helped create a large climate of skepticism and disbelief; paralleling the increased suspicion of DID was the decline of interest in dissociation as a laboratory and clinical phenomenon.
The word "schizophrenia"—which translates roughly as "splitting of the mind" and comes from the Greek roots "schizein" (σχίζειν, "to split") and "phrēn", "phren-" (φρήν, φρεν-, "mind")—was coined by Eugen Bleuler in 1908 and was intended to describe the separation of function between personality, thinking, memory, and perception. Bleuler described the main symptoms as four "A"'s: flattened "Affect", "Autism", impaired "Association" of ideas and "Ambivalence". Bleuler realized that the illness was not a dementia as some of his patients improved rather than deteriorated and hence proposed the term "schizophrenia" instead. However, many at the time did not accept that splitting or dissociation was an appropriate description, and the term would later have more significance as a source of confusion and social stigma than scientific meaning.
About 10% of people with PCS develop sensitivity to light or noise, about 5% experience a decreased sense of taste or smell, and about 14% report blurred vision. People may also have double vision or ringing in the ears, also called tinnitus. PCS may cause insomnia, fatigue, or other problems with sleep.
The word "schizophrenia" was coined by the Swiss psychiatrist and eugenicist Eugen Bleuler in 1908, and was intended to describe the separation of function between personality, thinking, memory, and perception. He formally introduced the term on 24 April 1908 in a lecture given at a psychiatric conference in Berlin and in a publication that same year. Bleuler later expanded his new disease concept into a monograph in 1911, which was finally translated into English in 1950.
In 2000, the World Health Organization found the percentage of people affected and the number of new cases that develop each year is roughly similar around the world, with age-standardized prevalence per 100,000 ranging from 343 in Africa to 544 in Japan and Oceania for men, and from 378 in Africa to 527 in Southeastern Europe for women. About 1.1% of adults have schizophrenia in the United States.
A 2005 review of prior surveys in 46 countries on the prevalence of schizophrenic disorders, including a prior 10-country WHO survey, found an average (median) figure of 0.4% for lifetime prevalence up to the point of assessment and 0.3% in the 12-month period prior to assessment. A related figure not given in other studies (known as lifetime morbid risk), reported to be an accurate statement of how many people would theoretically develop schizophrenia at any point in life regardless of time of assessment, was found to be "about seven to eight individuals per 1,000" (0.7/0.8%). The prevalence of schizophrenia was consistently lower in poorer countries than in richer countries (though not the incidence), but the prevalence did not differ between urban/rural areas or men/women (although incidence did).
Obsessive-compulsive individuals have difficulty forgetting unwanted thoughts. When they encode this information into memory they encode it as a neutral or positive thought. This is inconsistent with what a person without OCD would think about this thought, leading the individual with OCD to continue displaying their specific "ritual" to help deal with their anxiety. When asked to forget information they have encoded, OCD patients have difficulty forgetting what they are told to forget only when the subject is negative. Individuals not affected by OCD do not show this tendency. Researchers have proposed a general deficit hypothesis for memory related problems in OCD. There are limited studies investigating this hypothesis. These studies propose that memory is enhanced for menacing events that have occurred during the individuals life. For example, a study demonstrated that individuals with OCD exhibit exceptional recall for previously encountered events, but only when the event promoted anxiety in the individual.
Hypoglycemic symptoms and manifestations can be divided into those produced by the counterregulatory hormones (epinephrine/adrenaline and glucagon) triggered by the falling glucose, and the neuroglycopenic effects produced by the reduced brain sugar.Not all of the above manifestations occur in every case of hypoglycemia. There is no consistent order to the appearance of the symptoms, if symptoms even occur. Specific manifestations may also vary by age, by severity of the hypoglycemia and the speed of the decline. In young children, vomiting can sometimes accompany morning hypoglycemia with ketosis. In older children and adults, moderately severe hypoglycemia can resemble mania, mental illness, drug intoxication, or drunkenness. In the elderly, hypoglycemia can produce focal stroke-like effects or a hard-to-define malaise. The symptoms of a single person may be similar from episode to episode, but are not necessarily so and may be influenced by the speed at which glucose levels are dropping, as well as previous incidents.
In support of the above mentioned conclusions many studies have been performed. Doctors Lindamer, Lohr, Harris, and Jeste conducted a study to determine age of onset of schizophrenia in which they examined gender differences in 194 patients ranging in age from 35 to 97. They found that the mean age for onset in men was 30, while in women it was 39. (It is important to note that this is just one study, and overall averages come from a combination of different studies). About 37% of the women developed schizophrenia at the age of 45, while only 16% of men reported the same. Thus, more women than men experience late onset schizophrenia. This indicates that there is indeed another peak for women at the age of 45 and women do develop schizophrenia later in life.
John finds that his son is still alive but suffers from Alzheimer's disease and is in a nursing home, with no children to help look after him. Assisted by Jack Harkness, John visits his son, who barely remembers John's presence. John becomes very remorseful at missing his son's life and being unable to adapt to modern times.
Hypoglycemic symptoms can also occur when one is sleeping. Examples of symptoms during sleep can include damp bed sheets or clothes from perspiration. Having nightmares or the act of crying out can be a sign of hypoglycemia. Once the individual is awake they may feel tired, irritable, or confused and these may be signs of hypoglycemia as well.
Agnosia is the inability to recognize certain objects, persons or sounds. Agnosia is typically caused by damage to the brain (most commonly in the occipital or parietal lobes) or from a neurological disorder. Treatments vary depending on the location and cause of the damage. Recovery is possible depending on the severity of the disorder and the severity of the damage to the brain. Many more specific types of agnosia diagnoses exist, including: associative visual agnosia, astereognosis, auditory agnosia, auditory verbal agnosia, prosopagnosia, simultanagnosia, topographical disorientation, visual agnosia etc.
Sensations are recorded most frequently following the amputation of an arm or a leg, but may also occur following the removal of a breast, teeth, or an internal organ. Phantom limb pain is the feeling of pain in an absent limb or a portion of a limb. The pain sensation varies from individual to individual.
Michael Briers of "PlayStationLifeStyle.net", stated that, "by working closely with neuroscientists and those unfortunate few who have been diagnosed as psychotic, "Hellblade" carefully avoids those cheap, half-assed tropes that render a character insane and, therefore, woefully one-dimensional. Not only does it act as a disservice to those who suffer with mental illness, this practice of painting in broad strokes only minimizes the room for nuance, but "Senua’s Sacrifice" boldly cuts through the white noise". Leif Johnson of "PC Gamer" praised the gripping depiction of a character suffering from psychosis, stating "Ninja Theory uses haunted eyes to full effect in long, moody closeups peppering the narrative. [Senua] peers not only into the darkness, but seemingly past the camera, past the screen. Looking back, I found depths of despair and anger there that were sometimes hard to meet head on [...] Some people would crumble under such pain. But still Senua fights. It's a little inspiring."
Obsessive-compulsive disorders are treated with various serotonergic antidepressants including the tricyclic antidepressant clomipramine and various SSRI medications. With existing drug therapy, OCD symptoms can be controlled, but not cured. Several of these compounds (including paroxetine, which has an FDA indication) have been tested successfully in conjunction with OCD hoarding.
Agnosia is "the loss or diminution of the ability to recognize familiar objects or stimuli usually as a result of brain damage". There are several different kinds of agnosia that affect every one of our senses, but the two most common related to speech are speech agnosia and phonagnosia.
An incident of disinformation about coprolalia and Tourette's involved Dr. Laura Schlessinger. According to the former Tourette Syndrome Association (name changed to Tourette Association of America in 2015), she berated a caller inquiring whether a child with TS should attend a family wedding, declaring that a majority of those with the condition exhibited coprolalia and should be excluded from many social situations, provoking an avalanche of angry calls about the misinformation. Garrison Keillor, radio show host of NPR's "A Prairie Home Companion", produced a segment in 2006, titled "Broadway Tourette's", about segregating people with stereotypical TS from other passengers on a cruise ship, prompting a press release from the Tourette Syndrome Association.
Phantom limb sensation is any sensory phenomenon (except pain) which is felt at an absent limb or a portion of the limb. It has been known that at least 80% of amputees experience phantom sensations at some time of their lives. Some experience some level of this phantom pain and feeling in the missing limb for the rest of their lives.
Agnosia is the inability to process sensory information. Often there is a loss of ability to recognize objects, persons, sounds, shapes, or smells while the specific sense is not defective nor is there any significant memory loss. It is usually associated with brain injury or neurological illness, particularly after damage to the occipitotemporal border, which is part of the ventral stream. Agnosia only affects a single modality, such as vision or hearing. More recently, a top-down interruption is considered to cause the disturbance of handling perceptual information.
Olfactory and tactile hallucinations correlate with one another in terms of prevalence in patients with schizophrenia. One particular study was conducted by Langdon et al., in which the prevalence of olfactory hallucinations and tactile hallucinations was analyzed in two distinct clinical samples of patients with schizophrenia. One of the samples contained patients with schizophrenia with tactile hallucinations as reported by the World Health Organization while the other sample contained cases with negative and positive types of tactile hallucinations in patients with schizophrenia. It was concluded that about 13% to 17% of patients with schizophrenia experience olfactory and tactile hallucinations. The study reported that socio-cultural factors influenced self-reporting of tactile hallucinations. Since hallucinations in general were feared as a symptoms of insanity, patients were reluctant to seek help for such symptoms. Moreover, the study concluded that tactile hallucinations were usually accompanied by several other hallucinations associated with different modalities such as taste and sight. However, the study failed to recognize the pathophysiology of tactile hallucinations in individuals with schizophrenia.
During severe episodes of mania or depression people with bipolar disorder may have psychotic symptoms, such as hallucinations or delusions. When experiencing hallucinations or delusions, people with schizophrenia often seem to "lose touch" with reality. "Voices" are the most common type of hallucination in schizophrenia. In bipolar disorder, the psychotic symptoms tend to reflect the person's extreme depressed or elated mood (mood congruence). People with either disorder may have delusions of grandeur in which they believe they are a famous person or historical figure. When psychotic symptoms are present, bipolar disorder is sometimes misdiagnosed as schizophrenia.
Auditory hallucinations are the most common "positive symptom" in children. (Positive symptoms have come to mean psychopathological disorders that are actively expressed, such as delusions, hallucinations, thought disorder etc.). A child's auditory hallucinations may include voices that are conversing with each other or voices that are speaking directly to the children themselves. Many children with auditory hallucinations believe that if they do not listen to the voices, the voices will harm them or someone else. Tactile and visual hallucinations seem relatively rare. The children often attribute the hallucinatory voices to a variety of beings, including family members or other people, evil forces ("the Devil", "a witch", "a spirit"), animals, characters from horror movies (Bloody Mary, Freddy Krueger) and less clearly recognizable sources ("bad things," "the whispers"). Command auditory hallucinations (also known as imperative hallucinations) were common and experienced by more than ½ of the group in a research at the Bellevue Hospital Center's Children's Psychiatric Inpatient Unit. And voices repeat and repeat: "Kill somebody!", "Kill her, kill her!". Delusions are reported in more than half of children with schizophrenia, but they are usually less complex than those of adults. Delusions are often connected with hallucinatory experiences. In a research delusions were characterized as persecutory for the most part, but some children reported delusions of control. Many said they were being tortured by the beings causing their visual and auditory hallucinations, some thought disobeying their voices would cause them harm.
People with schizophrenia may have a high rate of irritable bowel syndrome, but they often do not mention it unless specifically asked. Psychogenic polydipsia, or excessive fluid intake in the absence of physiological reasons to drink, is relatively common in people with schizophrenia.
Schizophrenia is often described in terms of positive and negative (or deficit) symptoms. "Positive symptoms" are those that most people do not normally experience, but are present in people with schizophrenia. They can include delusions, disordered thoughts and speech, and tactile, auditory, visual, olfactory and gustatory hallucinations, typically regarded as manifestations of psychosis. Hallucinations are also typically related to the content of the delusional theme. Positive symptoms generally respond well to medication.