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).
Quarks make up many different particles, so the hadrons are classified in two groups; those made from two quarks are called mesons, while particles made up from three quarks are called baryons. protons are made from two up quarks + one down quark; neutrons contain two down quarks + one up quark; so protons and neutrons are baryons.