Hyperkinesia
A tic can be defined as a repeated, individually recognizable, intermittent movement or movement fragments that are almost always briefly suppressible and are usually associated with awareness of an urge to perform the movement. These abnormal movements occur with intervening periods of normal movement. These movements are predictable, often triggered by stress, excitement, suggestion, or brief voluntary suppressibility. Many children say that the onset of tics can stem from the strong urge to move. Tics can be either muscular (alter normal motor function) or vocal (alter normal speech) in nature and most commonly involve the face, mouth, eyes, head, neck or shoulder muscles. Tics can also be classified as simple motor tics (a single brief stereotyped movement or movement fragment), complex motor tics (a more complex or sequential movement involving multiple muscle
groups), or phonic tics (including simple, brief phonations or vocalizations).
Singer Motors
Singer Cycle began motor vehicle production in 1901, purchasing the manufacturing rights to the Perks & Hooch Motor Wheel, a one-cylinder engine contained in a spoked aluminium wheel, known as a motorwheel. It was a four-stroke designed by former Beeston employees Edwin Perks and Frank Birch. A unique feature was that the engine, fuel tank, carburettor and low-tension magneto were all housed in a two-sided cast alloy spoked wheel. It was probably the first motor bicycle to be provided with magneto ignition. It was perhaps the only motorcycle engine of its era with reliable ignition.These were fitted to bicycles. The design was used by Singer & Co in the rear wheel and then the front wheel of a trike.