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).
Historically in the context of slave societies of the Americas, a quadroon or quarteron was a mixed-race person with one quarter African and three quarters European ancestry (or in the context of Australia, one quarter aboriginal ancestry). Similar classifications were octoroon for one eighth black and hexadecaroon for one sixteenth black.