Iris dilator muscle Iris dilator muscle The iris dilator muscle (pupil dilator muscle, pupillary dilator, radial muscle of iris, radiating fibers), is a smooth muscle of the eye, running radially in the iris and therefore fit as a dilator. The pupillary dilator consists of a spokelike arrangement of modified contractile cells called myoepithelial cells. These cells are stimulated by the sympathetic nervous system. When stimulated, the cells contract, widening the pupil and allowing for more light to pass through the eye. It is innervated by the sympathetic system, which acts by releasing noradrenaline, which acts on α1-receptors. Thus, when presented with a threatening
Muscle Shoals (film) Muscle Shoals (film) Muscle Shoals is a 2013 documentary film about FAME Studios and Muscle Shoals Sound Studio in Muscle Shoals, Alabama. The film was released by Magnolia Pictures on September 27, 2013. "Muscle Shoals" has generally received positive reviews from critics. Katie Van Syckle of "Rolling Stone" remarked "But the documentary’s real highlights are the musings of the musicians who recorded there. Performers including Aretha Franklin, Keith Richards, Mick Jagger, Jimmy Cliff, Ed King and Steve Winwood reflect on what went into creating the magical environment and the legendary recordings that it spawned. Artists were not only prolific in