Emotional Parasite: a Memoir of Depression

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Dysfunction in evaluations systems localized to the right lateral prefrontal cortex, regardless of delusion content, is supported by neuroimaging studies and is congruent with its role in conflict monitoring in healthy persons.

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Abnormal activation and reduced volume is seen in people with delusions, as well as in disorders associated with delusions such as frontotemporal dementia , psychosis and Lewy body dementia. Furthermore, lesions to this region are associated with "jumping to conclusions", damage to this region is associated with post-stroke delusions, and hypometabolism this region associated with caudate strokes presenting with delusions.

The aberrant salience model suggests that delusions are a result of people assigning excessive importance to irrelevant stimuli. In support of this hypothesis, regions normally associated with the salience network demonstrate reduced grey matter in people with delusions, and the neurotransmitter dopamine , which is widely implicated in salience processing, is also widely implicated in psychotic disorders.

Specific regions have been associated with specific types of delusions. The volume of the hippocampus and parahippocampus is related to paranoid delusions in Alzheimer's disease , and has been reported to be abnormal post mortem in one person with delusions. Capragas delusions have been associated with occipito-temporal damage, and may be related to failure to elicit normal emotions or memories in response to faces.

Psychosis is associated with ventral striatal hypoactivity during reward anticipation and feedback. Hypoactivity in the left ventral striatum is correlated with the severity of negative symptoms. The impairment that may present itself as anhedonia probably actually lies in the inability to identify goals, and to identify and engage in the behaviors necessary to achieve goals.

Psychosis has been traditionally linked to the neurotransmitter dopamine. In particular, the dopamine hypothesis of psychosis has been influential and states that psychosis results from an overactivity of dopamine function in the brain, particularly in the mesolimbic pathway.

The two major sources of evidence given to support this theory are that dopamine receptor D2 blocking drugs i. NMDA receptor dysfunction has been proposed as a mechanism in psychosis. The symptoms of dissociative intoxication are also considered to mirror the symptoms of schizophrenia, including negative psychotic symptoms. The connection between dopamine and psychosis is generally believed complex. While dopamine receptor D2 suppresses adenylate cyclase activity, the D1 receptor increases it.

If D2-blocking drugs are administered the blocked dopamine spills over to the D1 receptors. The increased adenylate cyclase activity affects genetic expression in the nerve cell, which takes time. Hence antipsychotic drugs take a week or two to reduce the symptoms of psychosis. Moreover, newer and equally effective antipsychotic drugs actually block slightly less dopamine in the brain than older drugs whilst also blocking 5-HT2A receptors, suggesting the 'dopamine hypothesis' may be oversimplified.

A review found an association between a first-episode of psychosis and prediabetes. Prolonged or high dose use of psychostimulants can alter normal functioning, making it similar to the manic phase of bipolar disorder. Psychostimulants, especially in one already prone to psychotic thinking, can cause some "positive" symptoms, such as delusional beliefs, particularly those persecutory in nature.

To make a diagnosis of a mental illness in someone with psychosis other potential causes must be excluded. Tests may be done to exclude substance use, medication, toxins, surgical complications, or other medical illnesses.

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A person with psychosis is referred to as psychotic. Delirium should be ruled out, which can be distinguished by visual hallucinations, acute onset and fluctuating level of consciousness, indicating other underlying factors, including medical illnesses.

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Because psychosis may be precipitated or exacerbated by common classes of medications, medication-induced psychosis should be ruled out , particularly for first-episode psychosis. Both substance- and medication-induced psychosis can be excluded to a high level of certainty, using toxicology screening.

Because some dietary supplements may also induce psychosis or mania, but cannot be ruled out with laboratory tests, a psychotic individual's family, partner, or friends should be asked whether the patient is currently taking any dietary supplements. Common mistakes made when diagnosing people who are psychotic include: [99]. Only after relevant and known causes of psychosis are excluded, a mental health clinician may make a psychiatric differential diagnosis using a person's family history, incorporating information from the person with psychosis, and information from family, friends, or significant others.

Types of psychosis in psychiatric disorders may be established by formal rating scales. The Brief Psychiatric Rating Scale BPRS [] assesses the level of 18 symptom constructs of psychosis such as hostility , suspicion , hallucination , and grandiosity.

It is based on the clinician's interview with the patient and observations of the patient's behavior over the previous 2—3 days. The patient's family can also answer questions on the behavior report. During the initial assessment and the follow-up, both positive and negative symptoms of psychosis can be assessed using the 30 item Positive and Negative Symptom Scale PANSS. The DSM-5 characterizes disorders as psychotic or on the schizophrenia spectrum if they involve hallucinations, delusions, disorganized thinking, grossly disorganized motor behavior, or negative symptoms.

The ICD has no specific definition of psychosis. Factor analysis of symptoms generally regarded as psychosis frequently yields a five factor solution, albeit five factors that are distinct from the five domains defined by the DSM-5 to encompass psychotic or schizophrenia spectrum disorders. The five factors are frequently labeled as hallucinations, delusions, disorganization, excitement, and emotional distress.

The evidence for the effectiveness of early interventions to prevent psychosis appeared inconclusive. The treatment of psychosis depends on the specific diagnosis such as schizophrenia, bipolar disorder or substance intoxication.

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  • The first-line treatment for many psychotic disorders is antipsychotic medication, [] which can reduce the positive symptoms of psychosis in about 7 to 14 days. The choice of which antipsychotic to use is based on benefits, risks, and costs. Most people on antipsychotics get side effects.

    People on typical antipsychotics tend to have a higher rate of extrapyramidal side effects while some atypicals are associated with considerable weight gain, diabetes and risk of metabolic syndrome ; this is most pronounced with olanzapine, while risperidone and quetiapine are also associated with weight gain.


    Psychological treatments such as acceptance and commitment therapy ACT are possibly useful in the treatment of psychosis, helping people to focus more on what they can do in terms of valued life directions despite challenging symptomology. Early intervention in psychosis is based on the observation that identifying and treating someone in the early stages of a psychosis can improve their longer term outcome.

    The word psychosis was introduced to the psychiatric literature in by Karl Friedrich Canstatt in his work Handbuch der Medizinischen Klinik. He used it as a shorthand for 'psychic neurosis'. At that time neurosis meant any disease of the nervous system , and Canstatt was thus referring to what was considered a psychological manifestation of brain disease. In its adjective form "psychotic", references to psychosis can be found in both clinical and non-clinical discussions.

    The word was also used to distinguish a condition considered a disorder of the mind, as opposed to neurosis , which was considered a disorder of the nervous system. The division of the major psychoses into manic depressive illness now called bipolar disorder and dementia praecox now called schizophrenia was made by Emil Kraepelin , who attempted to create a synthesis of the various mental disorders identified by 19th century psychiatrists , by grouping diseases together based on classification of common symptoms.

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    Kraepelin used the term 'manic depressive insanity' to describe the whole spectrum of mood disorders , in a far wider sense than it is usually used today. In Kraepelin's classification this would include 'unipolar' clinical depression , as well as bipolar disorder and other mood disorders such as cyclothymia. These are characterised by problems with mood control and the psychotic episodes appear associated with disturbances in mood, and patients often have periods of normal functioning between psychotic episodes even without medication. Schizophrenia is characterized by psychotic episodes that appear unrelated to disturbances in mood, and most non-medicated patients show signs of disturbance between psychotic episodes.

    Early civilizations considered madness a supernaturally inflicted phenomenon. Archaeologists have unearthed skulls with clearly visible drillings, some datable back to BC suggesting that trepanning was a common treatment for psychosis in ancient times.

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    Mark 5 :8—13 describes a man displaying what would today be described as psychotic symptoms. Christ cured this " demonic madness" by casting out the demons and hurling them into a herd of swine. Exorcism is still utilized in some religious circles as a treatment for psychosis presumed to be demonic possession. Many of these patients underwent exorcistic healing rituals that, though largely regarded as positive experiences by the patients, had no effect on symptomology. Results did, however, show a significant worsening of psychotic symptoms associated with exclusion of medical treatment for coercive forms of exorcism.

    The medical teachings of the fourth-century philosopher and physician Hippocrates of Cos proposed a natural, rather than supernatural, cause of human illness. In Hippocrates' work, the Hippocratic corpus , a holistic explanation for health and disease was developed to include madness and other "diseases of the mind. Men ought to know that from the brain, and from the brain only, arise our pleasures, joys, laughter, and jests, as well as our sorrows, pains, griefs and tears. Through it, in particular, we think, see, hear, and distinguish the ugly from the beautiful, the bad from the good, the pleasant from the unpleasant….

    It is the same thing which makes us mad or delirious, inspires us with dread and fear, whether by night or by day, brings sleeplessness, inopportune mistakes, aimless anxieties, absentmindedness, and acts that are contrary to habit.

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    Hippocrates espoused a theory of humoralism wherein disease is resultant of a shifting balance in bodily fluids including blood , phlegm , black bile , and yellow bile. In the case of psychosis, symptoms are thought to be caused by an excess of both blood and yellow bile. Thus, the proposed surgical intervention for psychotic or manic behavior was bloodletting. Although not a proponent of humoralism, Rush believed that active purging and bloodletting were efficacious corrections for disruptions in the circulatory system, a complication he believed was the primary cause of "insanity". In honor of such contributions, Benjamin Rush's image is in the official seal of the American Psychiatric Association.

    Early 20th century treatments for severe and persisting psychosis were characterized by an emphasis on shocking the nervous system. Such therapies include insulin shock therapy , cardiazol shock therapy, and electroconvulsive therapy. The acceptance of high-risk treatments led to more invasive medical interventions including psychosurgery. In , Swiss psychiatrist Gottlieb Burckhardt performed the first medically sanctioned psychosurgery in which the cerebral cortex was excised.

    Although some patients showed improvement of symptoms and became more subdued, one patient died and several developed aphasia or seizure disorders. Burckhardt would go on to publish his clinical outcomes in a scholarly paper. This procedure was met with criticism from the medical community and his academic and surgical endeavors were largely ignored.

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    Prior to the leucotomy, the chimps engaged in typical behavior including throwing feces and fighting. After the procedure, both chimps were pacified and less violent. The first clinical trial of antipsychotics also commonly known as neuroleptics for the treatment of psychosis took place in Chlorpromazine brand name: Thorazine passed clinical trials and became the first antipsychotic medication approved for the treatment of both acute and chronic psychosis. Although the mechanism of action was not discovered until , the administration of chlorpromazine marked the advent of the dopamine antagonist , or first generation antipsychotic.

    Emotional Parasite: a Memoir of Depression Emotional Parasite: a Memoir of Depression
    Emotional Parasite: a Memoir of Depression Emotional Parasite: a Memoir of Depression
    Emotional Parasite: a Memoir of Depression Emotional Parasite: a Memoir of Depression
    Emotional Parasite: a Memoir of Depression Emotional Parasite: a Memoir of Depression
    Emotional Parasite: a Memoir of Depression Emotional Parasite: a Memoir of Depression
    Emotional Parasite: a Memoir of Depression Emotional Parasite: a Memoir of Depression
    Emotional Parasite: a Memoir of Depression Emotional Parasite: a Memoir of Depression
    Emotional Parasite: a Memoir of Depression Emotional Parasite: a Memoir of Depression

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