background preloader


Facebook Twitter

Fatal familial insomnia. Fatal familial insomnia (FFI) is an extremely rare autosomal dominant inherited prion disease of the brain.

Fatal familial insomnia

It is almost always caused by a mutation to the protein PrPC, but can also develop spontaneously in patients with a non-inherited mutation variant called sporadic fatal insomnia (sFI). FFI has no known cure and involves progressively worsening insomnia, which leads to hallucinations, delirium, and confusional states like that of dementia.[1] The average survival span for patients diagnosed with FFI after the onset of symptoms is 18 months.[1] The mutated protein, called PrPSc, has been found in just 29 families worldwide, affecting about 78 people; if only one parent has the gene, the offspring have a 45% risk of inheriting it and developing the disease.

With onset usually around middle age, it is essential that a potential patient is tested if they wish to avoid passing FFI on to their children. The first recorded case was an Italian man, who died in Venice in the year 1765.[2] THE BRAIN FROM TOP TO BOTTOM. Vitamins. Coma. In medicine, a coma (from the Greek κῶμα koma, meaning "deep sleep") is a state of unconsciousness lasting more than six hours, in which a person: cannot be awakened; fails to respond normally to painful stimuli, light, or sound; lacks a normal sleep-wake cycle; and, does not initiate voluntary actions.[1] A person in a state of coma is described as being comatose.


A comatose person exhibits a complete absence of wakefulness and is unable to consciously feel, speak, hear, or move.[2] For a patient to maintain consciousness, two important neurological components must function. The first is the cerebral cortex—the gray matter that covers the outer layer of the brain. Lobotomy. Lobotomy (Greek: λοβός – lobos: "lobe (of brain)"; τομή – tomē: "cut/slice") is a neurosurgical procedure, a form of psychosurgery, also known as a leukotomy or leucotomy (from the Greek λευκός – leukos: "clear/white" and tome).


It consists of cutting or scraping away most of the connections to and from the prefrontal cortex, the anterior part of the frontal lobes of the brain. While the procedure, initially termed a leucotomy, has been controversial since its inception in 1935, it was a mainstream procedure for more than two decades, prescribed for psychiatric (and occasionally other) conditions – this despite general recognition of frequent and serious side-effects.

Context[edit] In the early 20th century, the number of patients residing in mental hospitals increased significantly[n 2] while little in the way of effective medical treatment was available. Early psychosurgery[edit] Gottlieb Burckhardt (1836–1907). Ludvig Puusepp c. 1920 The development of leucotomy[edit] Egas Moniz. Infectious mononucleosis. Infectious mononucleosis (IM; also known as mono, glandular fever, Pfeiffer's disease, Filatov's disease,[1] and sometimes colloquially as the kissing disease (from its oral transmission) is an infectious, widespread viral disease caused by the Epstein–Barr virus (EBV), one type of herpes virus, against which over 90% of adults are likely to have acquired immunity by the age of 40.[2][3] Occasionally, the symptoms can recur at a later period.[2] Most people are exposed to the virus as children, when the disease produces no noticeable or only flu-like symptoms.

Infectious mononucleosis

In developing countries, people are exposed to the virus in early childhood more often than in developed countries. Fibromyalgia. There is evidence that environmental factors and certain genes increase the risk of developing fibromyalgia – these same genes are also associated with other functional somatic syndromes and major depressive disorder.[14] The central symptom of fibromyalgia, namely widespread pain appears to result from neuro-chemical imbalances including activation of inflammatory pathways in the brain which results in abnormalities in pain processing.[15] The brains of fibromyalgia patients show functional and structural differences from those of healthy individuals, but it is unclear whether the brain anomalies cause fibromyalgia symptoms or are the product of an unknown underlying common cause.


Some research suggests that these brain anomalies may be the result of childhood stress, or prolonged or severe stress.[11] Fibromyalgia has been recognized as a diagnosable disorder by the US National Institutes of Health and the American College of Rheumatology.[16][17] On the other hand, Dr. Methamphetamine. Methamphetamine[note 1] (pronunciation: /ˌmɛθæmˈfɛtəmiːn/; contracted from N-methyl-alpha-methylphenethylamine) is a neurotoxin and potent psychostimulant of the phenethylamine and amphetamine classes that is used to treat attention deficit hyperactivity disorder (ADHD) and obesity. Methamphetamine exists as two enantiomers, dextrorotary and levorotary. [note 2] Dextromethamphetamine is a stronger central nervous system (CNS) stimulant than levomethamphetamine; however, both are addictive and produce the same toxicity symptoms at high doses.

Although rarely prescribed due to the potential risks, methamphetamine hydrochloride is approved by the United States Food and Drug Administration (USFDA) under the trade name Desoxyn. Recreationally, methamphetamine is used to increase sexual desire, lift the mood, and increase energy, allowing some users to engage in sexual activity continuously for several days straight.

Uses Medical Recreational Crystal meth – illicit methamphetamine hydrochloride. Ricin. Toxicity[edit] Castor beans The seeds can be crushed in an oil press to extract castor oil.


This leaves behind the spent crushed seeds, called variously the 'cake', 'oil cake', and 'press cake'. While the oil cake from coconut, peanuts, and sometimes cotton seeds can be used as either cattle feed and/or fertilizer, the toxic nature of castor precludes them from being used as feed.[11] Accidental ingestion of Ricinus communis cake to be used as fertilizer has been reported to be responsible for fatal ricin poisoning in animals.[4][12] Mupirocin. Mupirocin is bacteriostatic at low concentrations and bactericidal at high concentrations.[3] It is used topically and is effective against Gram-positive bacteria, including MRSA.[4] Mupirocin is a mixture of several pseudomonic acids, with pseudomonic acid A (PA-A) constituting greater than 90% of the mixture.


Also present in mupirocin are pseudomonic acid B with an additional hydroxyl group at C8,[5] pseudomonic acid C with a double bond between C10 and C11, instead of the epoxide of PA-A,[6] and pseudomonic acid D with a double bond at C4` and C5` in the 9-hydroxy-nonanoic acid portion of mupirocin.[7] Mechanism[edit] Mupirocin reversibly binds to the isoleucyl t-RNA synthetase in Staphylococcus aureus and Streptococcus, resulting in inhibition of protein synthesis. Cerebral palsy. Cerebral palsy (CP) is a general term for a group of permanent, non-progressive movement disorders that cause physical disability,[1] mainly in the areas of body movement.[2] There may also be problems with sensation, depth perception, and communication ability.

Cerebral palsy

Difficulty with cognition and epilepsy is found in about one-third of cases. There are a number of subtypes including a type characterized by spasticity, a type characterized by poor co-ordination, and types which feature both symptoms or neither. Cerebral palsy is caused by damage to the motor control centers of the developing brain and can occur during pregnancy, during childbirth, or after birth up to about age three.[3][4] About 2% of all cerebral palsy cases are believed to be due to a genetic cause.[5] Cerebral palsy is not an infectious disease and is not contagious.

Most cases are diagnosed at a young age rather than during adolescence or adulthood. Chemotherapy. Chemotherapy (often abbreviated to chemo and sometimes CTX or CTx) is the treatment of cancer with one or more cytotoxic anti-neoplastic drugs (chemotherapeutic agents) as part of a standardized regimen.


Chemotherapy may be given with a curative intent or it may aim to prolong life or to palliate symptoms.