Neurosis is a class of functional mental disorders involving distress but neither delusions nor hallucinations, whereby behavior is not outside socially acceptable norms. It is also known as psychoneurosis or neurotic disorder, and thus those suffering from it are said to be neurotic. The term essentially describes an "invisible injury" and the resulting condition.

Neurosis was coined by the Scottish doctor William Cullen in 1769 to refer to "disorders of sense and motion" caused by a "general affection of the nervous system". For him, it described various nervous disorders and symptoms that could not be explained physiologically. It derives from the Greek word "νεῦρον" (neuron, "nerve") with the suffix -osis (diseased or abnormal condition). The term was however most influentially defined by Carl Jung and Sigmund Freud over a century later. It has continued to be used in contemporary theoretical writing in psychology and philosophy.

The American Diagnostic and Statistical Manual of Mental Disorders (DSM) has eliminated the category of "Neurosis", reflecting a decision by the editors to provide descriptions of behavior as opposed to hidden psychological mechanisms as diagnostic criteria, and, according to The American Heritage Medical Dictionary, it is "no longer used in psychiatric diagnosis". Instead, the disorders once classified as neuroses are now considered anxiety disorders. These changes to the DSM have been controversial.

Tribes of Neurot is an experimental ambient band that infuse tribal-like sounds into their music.

Tribes of Neurot is a side project of Neurosis that consists of all the members of Neurosis along with additional musicians. The music explores many of the same themes that Neurosis does but from a radically different angle. Whereas Neurosis has structured songs, Tribes of Neurot has given them the freedom to explore practically anything in music and sound, such as 2002's Adaptation and Survival, which consists entirely of insect noises recorded and mixed to create something that sounds entirely different. Many of their releases coincide with Neurosis releases, such as Silver Blood Transmission and Neurosis' Through Silver in Blood. Tribes of Neurot's Grace epitomizes this: released alongside Neurosis' Times of Grace, the two discs are meant to be played simultaneously for an enhanced experience that neither disc delivers on its own.

Ignazia Graziella Grace, usually known as Grace Grace (born 12 August 1958) is an Australian politician, representing the electoral district of Brisbane Central in the Queensland Legislative Assembly since the October 2007 by-election. She is a member of the Australian Labor Party.

She was born Ignazia Graziella Farfaglia in Brisbane, Queensland, the daughter of an Italian migrant cane cutter. She was an industrial relations advisor in the government of Prime Minister Paul Keating, until 1995 when she was elected as assistant general secretary, and in 2000 the first female general secretary, of the Queensland Council of Unions. "Grace" is an Anglicised version of "Graziella" and also her husband's surname.

Grace was elected to the Legislative Assembly in a by-election following the resignation of Premier Peter Beattie. The Coalition did not field a candidate. She won the seat again in the 2009 state election, despite an 8.4 percent swing to the newly merged Liberal National Party (LNP).

Grace was a notable supporter of the ALP government's decision to legislate civil partnerships for homosexual couples in Queensland. New Farm and Fortitude Valley, the main centres for Brisbane's gay community, are both in her electorate and she has built close ties with gay rights organisations.