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Insanity

Insanity is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Insanity rather than just read about it. In short: Insanity, madness, lunacy, and craziness are behaviors caused by certain abnormal mental or behavioral patterns. Insanity can manifest as violations of societal norms, including a person or persons becoming a danger to themselves or to other people.

Insanity — main illustration
Insanity — illustration

Key takeaways

  • Insanity belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Insanity to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Insanity from memory before moving on to harder problems.

Reference excerpt

Insanity, madness, lunacy, and craziness are behaviors caused by certain abnormal mental or behavioral patterns. Insanity can manifest as violations of societal norms, including a person or persons becoming a danger to themselves or to other people. Conceptually, mental insanity also is associated with the biological phenomenon of contagion (that mental illness is infectious) as in the case of copycat suicides. In contemporary usage, the term insanity is an informal, un-scientific term denoting "mental instability"; thus, the term insanity defense is the legal definition of mental instability. In medicine, the general term psychosis is used to include the presence of delusions and/or hallucinations in a patient; and psychiatric illness is "psychopathology", not mental insanity. In English, the word "sane" derives from the Latin adjective sanus, meaning "healthy". Juvenal's phrase mens sana in corpore sano is often translated to mean a "healthy mind in a healthy body". From this perspective, insanity can be considered as poor health of the mind, not necessarily of the brain as an organ (although that can affect mental health), but rather refers to defective function of mental processes such as reasoning. Another Latin phrase related to our current concept of sanity is compos mentis ("sound of mind"), and a euphemistic term for insanity is non compos mentis. In law, mens rea means having had criminal intent, or a guilty mind, when the act (actus reus) was committed. A more informal use of the term insanity is to denote something or someone considered highly unique, passionate or extreme, including in a positive sense. The term may also be used as an attempt to discredit or criticize particular ideas, beliefs, principles, desires, personal feelings, attitudes, or their proponents, such as in politics and religion.

Historical views and treatment Madness, the non-legal word for insanity, has been recognized throughout history in every known society. Some traditional cultures have turned to witch doctors or shamans to apply magic, herbal mixtures, or folk medicine to rid deranged persons of evil spirits or bizarre behavior, for example. Archaeologists have unearthed skulls (at least 7000 years old) that have small, round holes bored in them using flint tools. It has been conjectured that the subjects may have been thought to have been possessed by spirits that the holes would allow to escape. More recent research on the historical practice of trepanning supports the hypothesis that this procedure was medical in nature and intended as means of treating cranial trauma.

Ancient Greece The Greeks appeared to share something of the modern Western world's secular and holistic view, believing that afflictions of the mind did not differ from diseases of the body. Moreover, they saw mental and physical illness as a result of natural causes and an imbalance in bodily humors. Hippocrates frequently wrote that an excess of black bile resulted in irrational thinking and behavior.

Ancient Rome Romans made other contributions to psychiatry, in particular a precursor of some contemporary practice. They put forward the idea that strong emotions could lead to bodily ailments, the basis of today's theory of psychosomatic illness. The Romans also supported humane treatment of the mentally ill, and in so doing, codified into law the principle of insanity as a mitigation of responsibility for criminal acts, although the criterion for insanity was sharply set as the defendant had to be found "non compos mentis", a term meaning "not sound of mind".

From the Middle Ages onward The Middle Ages typically continued a number of ideas of the Greeks and Romans, such as humoral theory, building on Galenic medicine, which remained foundational into the Modern Era. The Late Medieval and Early Modern period saw the rise of mentally impaired people employed as court jesters, which provided them a certain legal privilege. As in the classical world, certain bouts of madness could be associated with spiritual possession, and people who displayed psychoses could be seen in several ways depending on context, evoking anything from pity to revulsion, such as in the complex case of Charles VI of France, who variously suffered from memory loss, confusion, and glass delusion. During the 18th century, the French and the British emphasised a need for humane treatment of the clinically insane, though the criteria for diagnosis and placement in an asylum were considerably looser than today, often including such conditions as speech disorder, speech impediments, epilepsy, and depression or being pregnant out of wedlock. Europe's oldest asylum was the precursor of today's Bethlem Royal Hospital in London, known then as Bedlam, which began admitting the mentally ill in 1403 and is mentioned in Chaucer's Canterbury Tales. The first American asylum was built in Williamsburg, Virginia, circa 1773. Before advancements in therapeutic treatment during the 19th and 20th century, these hospitals were moreso used to isolate the ostracised mentally ill from society rather than cure them or maintain their health. Pictures from this era frequently portray patients bound with rope or chains, often to beds or walls, or restrained in straitjackets.

Medicine Insanity is no longer considered a medical diagnosis but is a legal term in the United States, stemming from its original use in common law. The disorders formerly encompassed by the term covered a wide range of mental disorders now diagnosed as bipolar disorder, organic brain syndromes, schizophrenia, and other psychotic disorders.

Law

… excerpt ends here. Continue reading the full article.

Illustrations

Insanity: Engraving of the eighth print of A Rake's Progress, depicting inmates at Bedlam Asylum, by William Hogarth
Engraving of the eighth print of A Rake's Progress, depicting inmates at Bedlam Asylum, by William Hogarth
Insanity: Goya's Madhouse, 1812-1819
Goya's Madhouse, 1812-1819

Worked examples

Example 1 — a first encounter with Insanity

Start with the simplest possible case. Write down what Insanity claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Insanity before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Insanity ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Insanity

In research
Insanity appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Insanity in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Insanity is common in secondary-school and first-year university syllabi. It links to neighbouring topics Insanity, Obsolete medical terms, Pejorative terms for people with disabilities, so understanding it makes those chapters shorter.
In everyday life
Look for Insanity outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Insanity in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Insanity means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Insanity out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Insanity in simple terms?

Insanity, madness, lunacy, and craziness are behaviors caused by certain abnormal mental or behavioral patterns. Insanity can manifest as violations of societal norms, including a person or persons becoming a danger to themselves or to other people.

Why does Insanity matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Insanity?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Insanity.

Tags

  • Insanity
  • Obsolete medical terms
  • Pejorative terms for people with disabilities

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