All articles starting with M
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Motor glider
A motor glider is a glider fitted with an engine or electric motor, allowing it to launch itself or sustain flight while still soaring unpowered.
Motor neuron
A motor neuron, also called an efferent neuron or motor nerve cell, carries command signals from the central nervous system to muscles and glands, forming the final common path.
Motor neuron diseases
Motor neuron diseases (MNDs) are progressive neurological disorders destroying upper and lower motor neurons, causing weakness, wasting, and fasciculations. Main types are ALS (80–90% of cases), progressive bulbar palsy, primary lateral sclerosis, and progressive muscular atrophy; ALS is usually fatal within 3–5 years.
Motor neuroprosthetics
Motor neuroprosthetics: devices restoring movement after stroke or spinal cord injury by stimulating muscles, nerves, spinal cord, or brain, or decoding brain signals (BCIs), from Liberson's 1961 foot-drop stimulator to Utah-array robotic arm control.
Motor oil
Motor oil, also called engine oil, is the lubricant for internal combustion engines, made of mineral or synthetic base stock blended with up to 30 percent additives.
Motor Rifle Troops (Мотострелковые войска) (Soviet Union)
Motor Rifle Troops (Мотострелковые войска) were the mechanized infantry branch of the Soviet ground forces, mounted on BTRs and BMPs, organized into motor rifle divisions of about 12,500 prescribed troops, often maintained at 10-30 percent strength, and the basis of Russia's later battalion tactical groups.
Motor schema
A motor schema is the basic unit of motor behavior in a behavior-based robot control method introduced by Ronald C. Arkin in 1987, where behaviors sum their vector outputs.
Motor skill
Motor skill: learned ability to perform movements efficiently, assessed by retention and transfer. Covers Fitts-Posner stages, contextual interference (random vs blocked practice, SMD 0.55), implicit vs explicit learning, and cortex-basal ganglia-cerebellum mechanisms.
Motor Songs
Motor Songs (Моторни песни, Motorni pesni) is a 1940 poetry collection by Bulgarian poet Nikola Vaptsarov, the only book of his verse published in his lifetime.
Motor Trend
Motor Trend, also styled MotorTrend, is an American automotive media brand and magazine founded in 1949 by Robert E. Petersen in Los Angeles, known for its Car of the Year award, instrumented vehicle testing, and digital pivot under Hearst.
Motor Trend Car of the Year
Motor Trend Car of the Year, an annual award from MotorTrend magazine since 1949, first won by the 1949 Cadillac; judged on six criteria including design, engineering, safety, and value, with the Golden Calipers trophy.
Motor unit number estimation
Motor unit number estimation (MUNE), including MUNIX, MScanFit, and MPS variants, estimates the number of functioning motor units in a muscle from surface EMG, mainly to track lower motor neuron loss in ALS.
Motor vehicle
A motor vehicle, also called a motorized or automotive vehicle, is a power-driven road vehicle that carries people or goods under its own mechanical power, including cars, trucks, buses, and motorcycles.
Motor Vehicle Safety Act
The Motor Vehicle Safety Act, the National Traffic and Motor Vehicle Safety Act of 1966, is the US federal law authorizing motor vehicle safety standards, enforced by NHTSA.
Motor vehicle theft
Motor vehicle theft, also called car theft or auto theft, is the theft or attempted theft of a self-propelled land vehicle. Covers US definition, Dyer Act of 1919, immobilizer-driven declines, and 2025 US thefts of 659,880.
Motor-mediated vesicle transport
Motor-mediated vesicle transport is the active movement of vesicles and organelles along cytoskeletal tracks by motor proteins, with kinesin and dynein on microtubules and myosin on actin.
Motorboating
Motorboating, also known as powerboating, is the sport of racing boats powered by internal combustion engines, contested as an Olympic medal sport only at London 1908.
Motorcycle
A motorcycle is a two-wheeled motor vehicle powered by an engine or electric motor, used for personal transport, sport, and commercial delivery, with over 500 million registered worldwide.
Motorcycle club
Motorcycle club (MC): an organized rider association with elected officer roles (president, vice-president, secretary, treasurer, road captain), a hang-around-to-full-member progression, and chapter or charter governance; distinguished from riding clubs and from 1% outlaw clubs.
Motorcycle conspicuity
Motorcycle conspicuity is how detectable a motorcycle and rider are to other road users; small size and a single light make motorcycles easy to overlook, particularly at intersections.
Motorcycle engine
A motorcycle engine is an internal combustion engine, or increasingly an electric motor, that powers a two-wheeled motor vehicle, most often a four-stroke gasoline engine.
Motorcycle helmet
A motorcycle helmet is protective headgear worn by motorcyclists that reduces the risk of death and head injury in a crash, with a rigid outer shell, energy-absorbing liner, and chin strap.
Motorcycle helmet law
A motorcycle helmet law legally requires motorcyclists to wear helmets. Laws are universal, partial for riders under 18 or inexperienced, or absent, as in Illinois, Iowa, and New Hampshire.
Motorcycle protective clothing
Motorcycle protective clothing is specialized garments and armor, including jackets, pants, gloves, and boots, that reduce rider injury in a crash by resisting abrasion and absorbing impact energy.
Motorcycle racing
Motorcycle racing, also called motorcycling sport or bike racing, spans road racing (MotoGP, Superbike, Isle of Man TT), motocross, speedway, trials, and drag racing; MotoGP bikes exceed 365 km/h and the TT remains the most dangerous event.
Motorcycle Safety Foundation
The Motorcycle Safety Foundation (MSF) is an American not-for-profit created by motorcycle manufacturers in 1972 that develops rider training curricula and licensing tests used by most states.
Motorcycle speedway
Motorcycle speedway, or simply speedway, is oval dirt-track motorcycle racing on loose shale or granite tracks with brakeless 500 cc methanol bikes; founded Maitland, Australia, December 15, 1923, now an FIM world championship sport.
Motorcycle trials
Motorcycle trials is an off-road motorcycle sport in which riders ride marked sections without putting a foot down, rewarded for balance and clutch control rather than speed.
Motörhead
Motörhead: English rock band formed in London in 1975 by Lemmy Kilmister after Hawkwind; loud, fast rock'n'roll that seeded speed and thrash metal; Ace of Spades, No Sleep 'Til Hammersmith; ended with Lemmy's death in 2015.
Motörhead (album)
Motörhead (1977) is the self-titled debut album by Motörhead, the eponymous Chiswick Records release. Recorded in days at Escape Studios with Speedy Keen, it peaked at UK number 43 and introduced the Snaggletooth logo.