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Tic

A tic is a sudden body movement that a person cant control. It might be a jerking movement of the hand, or blinking a lot, or a throat sound. Even if the person is told that they are doing it, they usually cant stop. Sometimes if they try really ...

                                               

Word salad

Word salad is language with meaningless, scrambled words. It is a "confused or unintelligible mixture of seemingly random words and phrases". Word salad is most often used for a symptom of a neurological or mental disorder. The words may or may n ...

                                               

Sleep

Sleep is a state of rest, which happens in animals, including humans. Animals that sleep are in an unconscious state, or mostly so. Most of the muscles that animals can control on purpose are inactive. Animals that are asleep do not react to stim ...

                                               

Freerunning sleep

Freerunning sleep can be sleep which is not adjusted, entrained, to the 24-hour cycle in nature. Sleep which is entrained to 24 hours but is not artificially regulated by alarm clocks etc. can also be called freerunning sleep.

                                               

Lucid dream

A lucid dream is essentially a dream in which the person is aware that he is in the dream. In a lucid dream, the person does not have to be in control of his surroundings for the dream to be lucid, and only being aware of the dream itself is suff ...

                                               

Nocturnal emission

A nocturnal emission or "wet dream" is when a boy or man has an orgasm while sleeping. Wet dreams can begin after a boy goes through puberty. Many young men have their first orgasm this way. They might not understand what has happened to them, if ...

                                               

Oneirology

Oneirology is the scientific study of dreams. Current research seeks connections between dreaming and current knowledge about how the brain works, as well as understanding of how the brain works during dreaming as pertains to memory formation and ...

                                               

Pineal gland

The pineal gland is a small endocrine gland in the middle of the brain of humans and other vertebrates. It makes and releases the hormone named melatonin. There is almost no melatonin in the blood in the daytime. At the end of the day, melatonin ...

                                               

Rapid eye movement

In mammals and birds, sleep can be divided into two categories. In one of them, the eyes move rapidly. This is called REM-sleep. Most dreams take place in this phase. REM-sleep occurs normally at intervals throughout the night. The periods of REM ...

                                               

Suprachiasmatic nucleus

The suprachiasmatic nucleus, is a small nucleus in the hypothalamus in middle of the brain. It is right on top of the optic chiasma. It is our "body clock", and controls our daily rhythms by hormones and nerve impulses. With its various cell type ...

                                               

Symptom

Symptoms are used in diagnosis. The term is used in medicine, and in other fields such as fault-finding in engineering. In medicine, it refers to things the patient feels or notices. It contrasts with signs, which are changes which a doctor sees ...

                                               

Amnesia

Amnesia is a what doctors call a loss or disturbance of memory. It is a loss of memory, that is to say, a person cannot remember certain things. Amnesia can be caused when someone has brain damage, a disease or when something really stressful hap ...

                                               

Anosmia

Anosmia is losing the sense of smell. The word is also used for people who never had this sense. The loss can be temporary, or permanent. The conditions that cause a temporary loss of this sense include: Blocking the nose, for example through sea ...

                                               

Aura (symptom)

An aura is the changes that people see, hear, smell, taste, or feel before they have an epileptic seizure, or before they have a migraine. It comes from the Greek word for breeze. The cause of the aura is related to the way the brain works, so th ...

                                               

Automatic behaviour

Automatic behaviour is the name for a set of actions that occur, without conscious thought. Usually, they are guided by a part of the nervous system that is called autonomic nervous system, or visceral nervous system. Automatic behaviour is like ...

                                               

Blunt trauma

Blunt trauma is a kind of trauma that usually results from being hit by something dull and firm. It is also called blunt force trauma. This is different from penetrating trauma where an object, such as a bullet enters the body. Common types of bl ...

                                               

Catalepsy

Catalepsy is a nervous condition. The body is fixed, with rigid muscles and fixed posture. The body position does not respond to stimuli, and there is decreased sensitivity to pain.

                                               

Chorea

Chorea is the name for a set of symptoms caused by some neurological conditions. The word "chorea" comes from Greek, where it means "dance". People with chorea move without being able to control those movements. The movements seem to spread from ...

                                               

Coma

Coma is a medical term. It is a state of deep unconsciousness. People who are in that state cannot be woken up. They also do not react to pain or light. Coma can result from various conditions. Some of these are intoxication, poisons, damages or ...

                                               

Cough

A cough, also known as tussis, is an action the body takes to get rid of anything that irritates the lungs or throat. To do this, muscles in the thoracic cavity contract to make air leave the lungs with a lot of force. Coughs often happen quickly ...

                                               

Delirium

Delirium is a medical term. The condition is also known as acute confusional state. Doctors use it to describe patients who have lost parts or all of their ability to focus attention. People who suffer from it may also have problems to concentrat ...

                                               

Delirium tremens

Delirium tremens is a medical emergency. It is the worst form of alcohol withdrawal, which can happen when a person who drinks a lot of alcohol suddenly stops drinking. "Delirium" means very bad confusion that comes on quickly; "tremens" means "s ...

                                               

Depression (mood)

Depression is a state of low mood and not wanting to do anything. It can change what a person thinks, does, feels, and sense of well-being. It may lead to being sad, make it harder to think and a large change in appetite and time spent sleeping. ...

                                               

Diarrhea

Diarrhea, also spelled diarrhoea, happens when the body makes more watery feces than normal. Diarrhea can occur in humans as well as most other mammals.

                                               

Fistula

The word fistula comes from a Latin word that means tube or pipe. In medicine, a fistula is an abnormal connection between two hollow spaces. This can be blood vessels, intestines, or other hollow organs. Fistulas are usually caused by injury or ...

                                               

Headache

A headache is when your head hurts. It is not when you hit your head with something and made it hurt that way, but when your head hurts from inside. A headache can be caused by one of several things, which are listed here: Fever By other neurolog ...

                                               

Itch

Itch is an unpleasant sensation that leads to the desire or reflex to scratch. Itch has many similarities to pain and both are unpleasant sensory experiences but their behavioral response patterns are different. Pain creates a reflex withdrawal w ...

                                               

Jaundice

Jaundice is when the skin and the whites of the eyes become a yellow color. People with jaundice have a problem with their liver, which stops it from removing heme properly. Heme changes to a chemical called bilirubin after red blood cell death. ...

                                               

Mental confusion

Mental confusion is a symptom. People suffering from it have problems finding their way around in the world. They have troubles remembering who they are, where they are, or what time it is. Additionally, they may have trouble remembering things o ...

                                               

Nausea

Nausea is a general feeling of unease and discomfort in the stomach, often with the urge to vomit. The word nausea comes from the Latin word for seasickness. Nausea is a symptom, rather than an illness or disease. The causes for it very often are ...

                                               

Intellectual disability

Intellectual disability is also called mental retardation, intellectual developmental disability, or general learning disability. It is an illness of the brain. Intellectual disability often starts when someone is very young.

                                               

Phantom smell

A phantom smell or olfactory hallucination is smelling an odor that is not actually there. It is also called phantosmia. It can occur in one nostril or both. Phantosmia with unpleasant smells, which is called cacosmia, is more common. It is often ...

                                               

Polydipsia

Polydipsia is excessive thirst or excess drinking. The word derives from the Greek πολυδίψιος "very thirsty", which is gotten from πολύς + δίψα. Polydipsia is a symptom in many diseases. It also occurs as a weird behaviour in some animals, such a ...

                                               

Sexual addiction

Sexual addiction is when people engage in sexual activities, especially sexual intercourse, even if this has negative consequences for them. Some scientists believe it is one of several sex-related disorders within an umbrella concept known as hy ...

                                               

Sleep paralysis

When people are dreaming, their muscles do not move, even if in their dream they are moving. This is a natural process which prevents that people actually perform the movements they do in their sleep. In general, people are not aware of this inab ...

                                               

Syncope

Syncope is the medical term for fainting or blacking out. It is a sudden loss of consciousness, usually for a short time. It is mostly because there is not enough oxygen in the brain. It can be for other reasons. Fainting is quite common. It usua ...

                                               

Thought disorder

In psychiatry the term thought disorder or formal thought disorder refers to a condition where people have problems with consistent and straight thinking leading to abnormalities e.g. with spoken and written language. The people who have this con ...

                                               

Vomit

Vomiting, also called puking, is emptying the contents of stomach through mouth. It can be either food or liquid in the stomach. It can be from infection, contaminated food or drink, foul smells or foul-tasting food, the brain being injured, a bl ...

                                               

Bed

A bed is a piece of furniture that people sleep on. It normally has a soft mattress on a bed frame. Many beds also have bed sheets to cover the mattress and additional sheets for the people to sleep under. People also use a pillow under their hea ...

                                               

Bookcase

A bookcase, or bookshelf, is a piece of furniture that is used to hold books. Bookcases can be different sizes, from a small single shelf to a large bookcase that can fill an entire wall. Libraries have many bookcases holding books on many differ ...

                                               

Bunk bed

A bunk bed is a stack of two or more beds. Metal poles or wooden beams connect the bottom bed to the top bed. A ladder is used to get up to the top bunk. The ladder is usually attached to the bed. In the Philippines, a bunk bed is called a double ...

                                               

Chamber pot

A chamber pot, a piss pot, a potty, a po, a gazunder, or a thunder pot) is a container with a handle, usually used as a urinal at night. It is kept in a bedroom under a bed or in a nightstand. During Victorian times, some chamber pots were built ...

                                               

Couch

A couch, sofa or settee is a kind of furniture that is designed to seat more than one person. It usually has a place to rest your arm on each side. Couches are normally found in the living room or in front of the TV. In the 17th and 18th centurie ...

                                               

Desk

A desk is a piece of furniture where someone can sit and write, often with drawers or other places to put books, papers, and other things. Unlike a table, there is only one side of the desk where somebody could sit. Desks come in many different s ...

                                               

Furniture

Furniture is the word that means all the things like chairs, tables, cupboards, beds and bookcases. In other words, furniture are all the things that are in the house and that people can use to sit, to lie on or that are supposed to contain small ...

                                               

Futon

Futons are traditional Japanese bedding. A futon is a padded mattress, called a shikibuton, a quilt, called a kakebuton, and a pillow filled with beans, called a makura. The futon was put on the floor at night for sleeping. They could be easily r ...

                                               

Nightstand

A nightstand, is a small type of table. It is usually placed next to a bed or somewhere else in a bedroom. It is a coffee table which is used next to a persons bed at night time. Before flushing toilets became common, nightstands usually had a ch ...

                                               

Patina

A patina is a coating of various chemical compounds such as oxides or carbonates formed on the surface of metal or other material. Often this is due to exposure to weather. The word "patina" comes from the Latin word meaning "shallow dish". For m ...

                                               

Rosewood

Rosewood is wood from trees of the genus Dalbergia. The wood of Dalbergia nigra is known as "Brazilian rosewood", and also as "Bahia rosewood".It has a strong, sweet smell, which lasts for many years. Another rosewood comes from Dalbergia latifol ...

                                               

Seat

A seat is where someone sits. A seat can be a chair or a bench. It is said that sitting more closer to someone can make people say or think good things about them.