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King Mithridates I Callinicus or Antiochus I of Commagene shaking hands with Hercules Dexiosis on Attic Lekythos 5th century BCE. Dexiosis (Greek: δεξίωσις dexiōsis, 'greeting' to δεξιόομαι dexioomai‚ 'to give (someone) the right (hand)' δεξιός, dexios 'right'; Latin: dextrarum iunctio‚ 'joining together of the right hands'), in the fine arts, is the representation ...
A tremor is an involuntary, [1] somewhat rhythmic muscle contraction and relaxation involving oscillations or twitching movements of one or more body parts. It is the most common of all involuntary movements and can affect the hands, arms, eyes, face, head, vocal folds, trunk, and legs. Most tremors occur in the hands.
Myoclonus is a brief, involuntary, irregular (lacking rhythm) twitching of a muscle, a joint, or a group of muscles, different from clonus, which is rhythmic or regular.. Myoclonus (myo-"muscle", clonus "spasm") describes a medical sign and, generally, is not a diagnosis of a dis
Resting tremor is the most common, but kinetic tremors—occurring during voluntary movements—and postural tremor—preventing upright, stable posture—also occur. [19] Tremor largely affects the hands and feet: [ 19 ] a classic parkinsonian tremor is " pill-rolling ", a resting tremor in which the thumb and index finger make contact in a ...
Asterixis (more colloquially referred to as flapping tremor) is not actually a tremor, but rather a negative myoclonus.This movement disorder is characterized by an inability to maintain a position, which is demonstrated by jerking movements of the outstretched hands when bent upward at the wrist (which can be similar to a bird flapping its wings, hence the name "flapping tremor").
Adab (Hindustani: آداب , आदाब ), from the Arabic word Aadaab (آداب), meaning respect and politeness, is a hand gesture used in the Indian subcontinent, by the Urdu-speaking while greeting. [1] [2] It involves raising the right hand in front of the eyes with palm inwards, while the upper torso is bent forward.
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Writer's cramp or focal hand dystonia (FHD) is an idiopathic movement disorder of adult onset, characterized by abnormal posturing and movement of the hand and/or forearm during tasks requiring skilled hand use, such as writing.