Diet and Nutrition News & Advice. Supporting Sustainability on International Youth Day. August 12th is International Youth Day! The United Nations first designated International Youth Day in 2000 to draw attention to the health, cultural, and economic issues on a...
The splenius muscle is a superficial (top layer) muscle found on each side of the neck. It attaches the cervical (neck) and thoracic (upper back) vertebrae to the skull (mastoid process of temporal bone).ctivities that cause splenius muscle pain and symptoms in the horse: 1  A rider who constantly pulls or balances on the reins (lesson horse, rental horse). 2  A horse whose discipline requires collection and flexion of the head/neck (dressage, race horses).
During contraction of sphincter/circular muscles, the lumen associated with the sphincter constricts (closes). This constriction is caused from the shortening of the sphincter muscle. While relaxation of a sphincter muscle causes the lumen to open, which is caused by the lengthening of the associated sphincter muscle.phincters prove effective in the mediation of the entrance or release of liquids and solids; this is evident, for example, in the blowholes of numerous marine mammals. Many sphincters are used every day in the normal course of digestion and vision.