New research has found that a subset of retinal neurons sends inhibitory signals to the brain. Before, researchers believed the eye only sends excitatory signals.
The function of a special group of nerve cells which are found in the eye and which sense visual movement have been discovered by researchers from Aarhus University. A completely new understanding of how conscious sensory impressions occur in the brain has been acquired through the study. The development of targeted and specific forms of treatment in the future for diseases which impact the nervous system and its sensory apparatus, such as dementia and schizophrenia, needs this kind of insight.
It is no secret that the United States has a drug overdose epidemic. More than 700,000 people have died by overdose in the U.S. since 1999. Much of this problem can be attributed to the rising use of opioids, the diversion of opioids for medical and non-medical pain conditions, and the adulteration of opioids with other potent psychoactive drugs such as fentanyl. This problem continues.