Mydriasis iris sphincter, composed of circularly arranged muscle fibers, and the iris dilator, composed of radially arranged muscle fibers. The sphincter is innervated by (signaled by nerves of) the parasympathetic nervous system, and the dilator by the sympathetic nervous system. Sympathetic stimulation of the adrenergic receptors causes the contraction of the radial muscle and subsequent dilation of the pupil. Conversely, parasympathetic stimulation causes contraction of the circular muscle and constriction of the pupil. The mechanism of mydriasis depends on the agent being used. It usually involves either a disruption of the parasympathetic nerve supply to the eye (which normally constricts the
Widening participation the Laura Spence Affair which hit the headlines in 2000, and after the University of Bristol admissions controversy in 2003, which concerned alleged biases in favour of the state sector. HEFCE is pursuing this policy through a number of measures, including the payment of financial incentives to universities and by funding the Aimhigher programme. This policy is linked to the previous Labour government's target of increasing participation in higher education to 50% by 2010. Widening participation Widening participation (WP) in higher education is a major component of government education policy in the United Kingdom and Europe. It consists of an