Strangling is compression of the neck that may lead to unconsciousness or death by causing an increasingly hypoxic state in the brain. Fatal strangling typically occurs in cases of violence, accidents, and is one of two main ways that hanging may cause death (alongside breaking the victim's neck).

Strangling does not have to be fatal; limited or interrupted strangling is practised in erotic asphyxia, in the choking game, and is an important technique in many combat sports and self-defence systems.

Strangling can be divided into three general types according to the mechanism used:

- Hanging—Suspension from a cord wound around the neck

- Ligature strangulation—Strangulation without suspension using some form of cord-like object called a garrote

- Manual strangulation—Strangulation using the fingers or other extremity

Schwabenhass (German for "hatred against Swabians") is a political slogan about aversion to the approximately 300,000 strong Swabian minority in Berlin. In 2013, the so-called "spätzlestreit" gained nationwide attention.

Strangling involves one or several mechanisms that interfere with the normal flow of oxygen into the brain:

- Compression of the carotid arteries or jugular veins—causing cerebral ischemia.

- Compression of the laryngopharynx, larynx, or trachea—causing asphyxia.

- Stimulation of the carotid sinus reflex—causing bradycardia, hypotension, or both.

Depending on the particular method of strangulation, one or several of these typically occur in combination; vascular obstruction is usually the main mechanism. Complete obstruction of blood flow to the brain is associated with irreversible neurological damage and death, but during strangulation there is still unimpeded blood flow in the vertebral arteries. Estimates have been made that significant occlusion of the carotid arteries and jugular veins occurs with a pressure of around , while the trachea demands six times more at approximately .

As in all cases of strangulation, the rapidity of death can be affected by the susceptibility to carotid sinus stimulation. Carotid sinus reflex death is sometimes considered a mechanism of death in cases of strangulation, but it remains highly disputed. The reported time from application to unconsciousness varies from 7–14 seconds if effectively applied to one minute in other cases, with death occurring minutes after unconsciousness.

Triskaidekaphobia (, or ; from Greek "tris" meaning "three", "kai" meaning "and", "deka" meaning "10" and "phobos" meaning "fear") is fear or avoidance of the number . It is also a reason for the fear of Friday the 13th, called "paraskevidekatriaphobia" (from Παρασκευή "Paraskevi", Greek for Friday) or "friggatriskaidekaphobia" (after Frigg, the Norse goddess after whom Friday is named in English).

The term was used as early as in 1910 by Isador Coriat in "Abnormal Psychology".

Islamophobia in Australia is a fear of Islam in Australian society; it has been associated with hostile and discriminatory practices toward Muslim individuals or communities and the exclusion of Muslims from social, cultural and political affairs.

Islamophobia and intolerance towards Muslims has existed well prior to the September 11 attacks on the United States.

An earworm, sometimes known as a brainworm, sticky music, stuck song syndrome, or Involuntary Musical Imagery (INMI) is a catchy piece of music that continually repeats through a person's mind after it is no longer playing. Phrases used to describe an earworm include "musical imagery repetition", "involuntary musical imagery", and "stuck song syndrome". The word "" is possibly a calque from the German "". The earliest known usage is in Desmond Bagley's 1978 novel "Flyaway".

Researchers who have studied and written about the phenomenon include Theodor Reik, Sean Bennett, Oliver Sacks, Daniel Levitin, James Kellaris, Philip Beaman, Vicky Williamson, and, in a more theoretical perspective, Peter Szendy. The phenomenon is common and should not be confused with palinacousis, a rare medical condition caused by damage to the temporal lobe of the brain that results in auditory hallucinations.

A monstrous birth, variously defined in history, is a birth in which a defect of some sort renders the animal or human child monstrous. Such births were often taken as omens, signs of God, or moral warnings, but besides these supernatural or religious explanations, medical explanations were also given, in which often the mother's state of mind or her sexual behavior was responsible for the deformed fetus. In early and medieval Christianity, monstrous births posed difficult theological problems about humanity and salvation; in the early modern period the interest shifted toward scientific inquiry.

Morgellons (/mɔː(ɹ)ˈdʒɛlənz/) is the informal name of a self-diagnosed skin condition in which individuals have sores that they believe contain some kind of fibers. Morgellons is poorly understood but the general medical consensus is that it is a form of delusional parasitosis; the sores are the result of compulsive scratching, and the fibers, when analysed, turn out to originate from textiles.

The name was coined in 2002 by Mary Leitao, a mother who rejected the medical diagnosis of her son's delusional parasitosis. She revived it from a letter written by a physician in the mid-17th century. Leitao and others involved in her Morgellons Research Foundation successfully lobbied members of the U.S. Congress and the U.S. Centers for Disease Control and Prevention (CDC) to investigate the condition in 2006. CDC researchers issued the results of their multi-year study in January 2012, indicating that there were no disease organisms present in people with Morgellons and that the fibers found were likely cotton, and concluded that the condition was "similar to more commonly recognized conditions such as delusional infestation".

The fear of ghosts in many human cultures is based on beliefs that some ghosts may be malevolent towards people and dangerous (within the range of all possible attitudes, including mischievous, benign, indifferent, etc.). It is related to fear of the dark.

The fear of ghosts is sometimes referred to as phasmophobia and erroneously spectrophobia, the latter being an established term for fear of mirrors and one's own reflections.

In psychiatry, oikophobia (synonymous with domatophobia and ecophobia) is an aversion to home surroundings. It can also be used more generally to mean an abnormal fear (a phobia) of the home, or of the contents of a house ("fear of household appliances, equipment, bathtubs, household chemicals, and other common objects in the home"). The term derives from the Greek words "oikos", meaning household, house, or family, and "phobia", meaning "fear".

In 1808 the poet and essayist Robert Southey used the word to describe a desire (particularly by the English) to leave home and travel. Southey's usage as a synonym for wanderlust was picked up by other nineteenth century writers.

The term has also been used in political contexts to refer critically to political ideologies that repudiate one's own culture and laud others. The first such usage was by Roger Scruton in a 2004 book.

Katagelasticism is a psychological condition in which a person excessively enjoys laughing at others (coined by Christian F. Hempelmann and Sean Harrigan from ("katagelastēs"), Ancient Greek for “mocker”). Katagelasticists actively seek and establish situations in which they can laugh at others (at the expense of these people). There is a broad variety of things that katagelasticists would do—starting from harmless pranks or word plays to truly embarrassing and even harmful, mean-spirited jokes. They would be of the opinion that laughing at others is part of the daily life and if others do not like being laughed at, they should just fight back. For the katagelasticists it is fun laughing at others and there is almost nothing that might hinder them from doing so. For them, some people even might provoke getting laughed at (and surely deserve being laughed at). This condition often makes it difficult for sufferers to gain and maintain acquaintances and romantic partners.

Solipsism syndrome refers to a psychological state in which a person feels that the world is not external to his or her mind. Periods of extended isolation may predispose people to this condition. In particular, the syndrome has been identified as a potential concern for individuals living in outer space for extended periods of time.

A fasting girl was one of a number of young Victorian girls, usually pre-adolescent, who claimed to be able to survive over indefinitely long periods of time without consuming any food or other nourishment. In addition to refusing food, fasting girls claimed to have special religious or magical powers.

The ability to survive without nourishment was attributed to some saints during the Middle Ages, including Catherine of Siena and Lidwina of Schiedam, and regarded as a miracle and a sign of sanctity. Numerous cases of fasting girls were reported in the late 19th century. Believers regarded such cases as miraculous.

In some cases, the fasting girls also exhibited the appearance of stigmata. Doctors, however, such as William A. Hammond ascribed the phenomenon to fraud and hysteria on the part of the girl. Historian Joan Jacobs Brumberg believes the phenomenon to be an early example of anorexia nervosa.

Apotemnophilia is a disorder characterized by the intense and long-standing desire for amputation of a specific limb. In recent years the word apotemnophilia has come to be seen to carry pejorative overtones, meaning as it does "a love of amputation" and implying that the condition is a sexual paraphilia. In an attempt to move towards a more neutral term for desiring an amputation McGeoch, Brang and Ramachandran proposed that the desire for an amputation be renamed "xenomelia", which derives from the Greek to mean foreign limb. Another term for the condition is body integrity identity disorder (BIID), but this has come to apply to not only those who desire an amputation but also those who want a range of disabilities including deafness, blindness and a spinal cord injury.

Apotemnophilia (xenomelia) has features in common with somatoparaphrenia. Some apotemnophiles seek surgeons to perform an amputation or purposefully injure a limb in order to force emergency medical amputation. A separate definition of apotemnophilia is erotic interest in being or looking like an amputee. This separate definition should not be confused with acrotomophilia, which is the erotic interest in people who "are" amputees.

Apotemnophilia (xenomelia) was first described in a 1977 article by psychologists Gregg Furth and John Money: "Apotemnophilia: two cases of self-demand amputation as paraphilia." Until recently, the primary explanation for Apotemnophilia was psychological/psychiatric, however recent research suggests that here may be a neurological etiology for this disorder.

Pyrophilia is a relatively uncommon paraphilia in which a subject derives gratification from fire and fire-starting activity. It is distinguished from pyromania by the gratification being of a sexual nature.

Morgellons is poorly understood but the general medical consensus is that it is a form of delusional parasitosis in which individuals have some form of actual skin condition that they believe contains some kind of fibers.

Panphobia, omniphobia, pantophobia, or panophobia is a vague and persistent dread of some unknown evil. Panphobia is not registered as a type of phobia in medical references.

The first academic paper to investigate this phenomenon was published in 2009. Along with gelotophobia and gelotophilia it can be measured through a questionnaire that consists of 45 questions (the PhoPhiKat-45; the PhoPhiKat-30 is a short form that consists of 30 items). This is a reliable and valid instrument that has been used in a variety of studies. The questionnaire is also online for a free self-assessment in an English form at gelotophobia.org and in a German form here.

Gelotophobia, gelotophilia, and katagelasticism describe three different stances towards laughter and laughing at. Empirical studies with the PhoPhiKat-45 show that, of course, people can not at the same time fear and like being laughed at (i.e., be gelotophobes and gelotophiles at the same time). However, there is at least a subgroup of gelotophobes that enjoys laughing at others, despite knowing how harmful this can be. Finally, gelotophilia and katagelasticism are positively related; i.e., those who enjoy being laughed at might also enjoy laughing at others.

Individuals experiencing solipsism syndrome feel that the world is not 'real' in the sense of being external to their own minds. The syndrome is characterized by feelings of loneliness, detachment and indifference to the outside world. Solipsism syndrome is not currently recognized as a psychiatric disorder by the American Psychiatric Association, though it shares similarities with depersonalization disorder, which is recognized. Solipsism syndrome is distinct from solipsism, which is not a psychological state but rather a philosophical position, namely that nothing exists or can be known to exist outside of one's own mind; advocates of this philosophy do not necessarily suffer from solipsism syndrome, and sufferers do not necessarily subscribe to solipsism as a school of intellectual thought.

Periods of extended isolation may predispose people to solipsism syndrome. In particular, the syndrome has been identified as a potential challenge for astronauts and cosmonauts on long-term missions,

and these concerns influence the design of artificial habitats.

Islamophobia in Australia is understood as a set of negative beliefs concerning the Ideology of Islam, as well as a contemporary outlet for general public anger and resentment towards migration and multiculturalism.

A bite of "Latrodectus" may not inject any venom (known as a dry bite) and so no illness occurs. About 75% of "wet" bites will have localized pain and nothing more. If, however, there is a substantial dose, a bite can cause latrodectism. The main symptoms are generalized muscle pain, stomach cramps, nausea and vomiting.

Initially a pinprick or burning sensation can be felt when bitten by widow spiders. If there was enough venom injected, pain worsens over the next hour. The area will develop localized sweating and gooseflesh piloerection. The pain may spread and become generalized.

The typical duration is three to six days. Some people who do not receive antivenom may feel unwell, be weak, and have muscle pain for weeks.

Apotemnophia / Body Integrity Disorder (BIID) is a is a rare, infrequently studied and highly secretive condition in which there is a mismatch between the mental body image and the physical body. Apotemnomphilia is characterized by an intense desire for amputation of a limb. Currently BIID is not included in the International Statistical Classification of Diseases 11 or the Diagnostic and Statistical Manual of Mental Disorders IV. It is often not known to surgeons, neurologists and psychiatrists. BIID individuals typically avoid healthcare and often act out their desires by pretending they are disabled or perform actual self-amputation.

A 2012 study concluded, based on interviews with 54 individuals, that the main rationale for their desire for body modification (amputation) was to feel complete or to feel satisfied inside. Based on the results of the survey, researchers concluded that psychotherapy was often supportive, but did not help diminishing BIID symptoms. Individuals reported that antidepressants were helpful in reducing depressive symptoms related to BIID, but that antipsychotics were not. Actual amputation of the limb was effective in all 7 cases who had surgical treatment.

Apathy is a lack of feeling, emotion, interest, and concern. Apathy is a state of indifference, or the suppression of emotions such as concern, excitement, motivation, or passion. An apathetic individual has an absence of interest in or concern about emotional, social, spiritual, philosophical, or physical life and the world.

The apathetic may lack a sense of purpose, worth, or meaning in their life. An apathetic person may also exhibit insensibility or sluggishness. In positive psychology, apathy is described as a result of the individuals feeling they do not possess the level of skill required to confront a challenge (i.e. "flow"). It may also be a result of perceiving no challenge at all (e.g. the challenge is irrelevant to them, or conversely, they have learned helplessness). Apathy may be a sign of more specific mental problems such as schizophrenia or dementia. However, apathy is something that all people face in some capacity. It is a natural response to disappointment, dejection, and stress. As a response, apathy is a way to forget about these negative feelings. This type of common apathy is usually only felt in the short-term and when it becomes a long-term or even lifelong state is when deeper social and psychological issues are most likely present.

Apathy should be distinguished from reduced affect, which refers to reduced emotional expression but not necessarily reduced emotion.

Hematemesis or haematemesis is the vomiting of blood. The source is generally the upper gastrointestinal tract, typically above the suspensory muscle of duodenum. Patients can easily confuse it with hemoptysis (coughing up blood), although the latter is more common. Hematemesis "is always an important sign".

Protein poisoning (also referred to colloquially as rabbit starvation, mal de caribou, or fat starvation) is a rare form of acute malnutrition thought to be caused by a complete absence of fat in the diet.

Excess protein is sometimes cited as the cause of this issue; when meat and fat are consumed in the correct ratio, such as that found in pemmican (which is 50% fat by volume), the diet is considered nutritionally complete and can support humans for months or more. Other stressors, such as severe cold or a dry environment, may intensify symptoms or decrease time to onset. Symptoms include diarrhea, headache, fatigue, low blood pressure, slow heart rate, and a vague discomfort and hunger (very similar to a food craving) that can be satisfied only by the consumption of fat.

Protein poisoning was first noted as a consequence of eating rabbit meat exclusively, hence the term, "rabbit starvation". Rabbit meat is very lean; commercial rabbit meat has 50–100 g dissectable fat per 2 kg (live weight). Based on a carcass yield of 60%, rabbit meat is around 8.3% fat while beef and pork are 32% fat and lamb 28%.