Definition/Description. Trapezius Myalgia is chronic pain of the upper trapezius muscle, most frequent is neck pain. It is a complex and multifactorial condition. Musculoskeletal pain is often intensifying by mental and social stress at home or work.
A hadron, in particle physics, is any subatomic (smaller than the atom) particle or antiparticle which is made of quarks. Quarks are fundamental particles which among other properties have an electrical charge and a name (e.g. 'up', 'down', 'strange'). The electrical charge of a single quark is always a fraction (e.g. 2/3).
A quark (/ËkwÉrk/ or /ËkwÉrk/) is an elementary particle and a fundamental constituent of matter. Quarks combine to form composite particles called hadrons, the most stable of which are protons and neutrons, the components of atomic nuclei.t the time of the quark theory's inception, the  particle zoo  included, amongst other particles, a multitude of hadrons. Gell-Mann and Zweig posited that they were not elementary particles, but were instead composed of combinations of quarks and antiquarks.