- published: 20 Jul 2016
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The guitar is a popular musical instrument classified as a string instrument with anywhere from 4 to 18 strings, usually having 6. The sound is projected either acoustically or through electrical amplification (for an acoustic guitar or an electric guitar, respectively). It is typically played by strumming or plucking the strings with the right hand while fretting (or pressing against the frets) the strings with the fingers of the left hand. The guitar is a type of chordophone, traditionally constructed from wood and strung with either gut, nylon or steel strings and distinguished from other chordophones by its construction and tuning. The modern guitar was preceded by the gittern, the vihuela, the four-course Renaissance guitar, and the five-course baroque guitar, all of which contributed to the development of the modern six-string instrument.
There are three main types of modern acoustic guitar: the classical guitar (nylon-string guitar), the steel-string acoustic guitar, and the archtop guitar. The tone of an acoustic guitar is produced by the strings's vibration, amplified by the body of the guitar, which acts as a resonating chamber. The classical guitar is often played as a solo instrument using a comprehensive finger-picking technique. The term "finger-picking" can also refer to a specific tradition of folk, blues, bluegrass, and country guitar playing in the United States.
Mania is the mood of an abnormally elevated arousal energy level, or "a state of heightened overall activation with enhanced affective expression together with lability of affect." Although mania is often conceived as a “mirror image” to depression, the heightened mood can be either euphoric or irritable; indeed, as the mania worsens, irritability often becomes more pronounced and may eventuate in violence.
The nosology of the various stages of a manic episode has changed over the decades. The word derives from the Greek μανία (mania), "madness, frenzy" and the verb μαίνομαι (mainomai), "to be mad, to rage, to be furious".
In current DSM-5 nomenclature, hypomanic episodes are separated from the more severe full manic episodes, which, in turn, are characterized as either mild, moderate, or severe, with specifiers with regard to certain symptomatic features (e.g., catatonic, psychotic). Mania, however, may be divided into three stages: hypomania, or stage I; acute mania, or stage II; and delirious mania, or stage III. This “staging” of a manic episode is, in particular, very useful from a descriptive and differential diagnostic point of view.
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