Our sense of sight is arguably our most important sense. Imagine how different your life would be if soon after birth, you lost the ability to see. For over 1.4 million children worldwide, that is their life. Being blind in developing countries like India has a costly impact: over 90% of blind children do not go to school, less than 50% make it to adulthood, and for those that do, only 20% are employed. But the real tragedy is that many of these cases of childhood blindness are completely avoidable and even treatable.
I would like to express my upmost gratitude for the vast amount of receptors you possess. Among my favorites – the practical ones that allow me to find keys at the bottom of my large jet-black bag, the emergency ones that warn me the fajita plate is searing, and those truly special ones that enable me to feel my lover’s caress and help me achieve orgasm…Continue reading
If you think about it, the surface of the human body, the skin, is actually one huge sheet of tactile receptors. The dozens of types of receptors that innervate the skin help us connect with our surroundings. But the properties of these neurons – how they are organized in the skin, where the project into the spinal cord and brainstem, and how this organization gives rise to the sense of touch – are actually poorly understood! I spoke with David Ginty, Ph.D., who is Professor of Neurobiology at Harvard Medical School and an investigator with the Howard Hughes Medical Institute, to find out about the newest ways his lab is studying sensory biology.Continue reading
What separates us from our physical environment is our skin. From the minute we wake up, we use our somatosensation to start our tangible interaction with the world. Is the water in the shower warm enough? Ouch, that razor blade hurts! These socks are really soft! All of these are sensations attributed to numerous neurons that innervate our skin. While some sensations are quick and call for immediate response (like a pinprick), others are relatively slow and grow on us (like the warmth of water or the pleasure during a massage).Continue reading