Stellarium Hearing Test - Can You Hear This? We got a lot of positive feedback on our Can You Hear Like a Teenager? article, and it inspired us to take it just a little bit further. Check your hearing with a list of tones that go from 8Hz all the way up to 22,000Hz. It’s fairly common for people who are over 25 years of age to not be able to hear above 15kHz and also experience some level of hearing loss or hearing damage such as tinnitus. This online test will help you find out where your high frequency hearing cuts off. Musicians have a much higher risk of hearing loss that most people do, and many of us don’t really wear proper hearing protection. Take our online hearing test: listen to each of these tones and let us know where your hearing cuts out. Importance of Hearing Protection If you’re around loud music a lot like I am, or if you are experiencing some hearing loss, I highly recommend getting a pair of hearing protection earplugs.
Muscular System Anatomy, Diagram & Function Without muscle, humans could not live. The primary job of muscle is to move the bones of the skeleton, but muscles also enable the heart to beat and constitute the walls of other important hollow organs. There are three types of muscle tissue: Skeletal muscle: This type of muscle creates movement in the body. There are more than 600 skeletal muscles, and they makes up about 40 percent of a person’s body weight. When the nervous system signals the muscle to contract, groups of muscles work together to move the skeleton. Muscle movement happens when neurological signals produce electrical changes in muscle cells. Muscle pain is a common issue that can signal numerous problems, even if it’s something as simple as overuse. Muscle pain Sprains and strains Bruising Cramping Myopathy Muscular dystrophy Parkinson’s disease Fibromyalgia Multiple sclerosis Proper nutrition and exercise is important to keeping all muscles healthy, whether they are cardiac, smooth, or skeletal.
5 Mind-Blowing Ways Your Senses Lie to You Every Day We are so completely dependent on our five senses every moment of the day that we totally forget how full of shit they can be. Your reality is cobbled together from a bunch of different parts of your brain working in conjunction, and often it's like a bickering conference room full of uncooperative co-workers. In fact, we're pretty sure the thing your brain does best is convince you that it works. But it doesn't take much to spot the bizarre little flaws in your gray matter. For example ... #5. Photos.com/AbleStock.com/Getty Images When you hear someone talk, the whole process is pretty straightforward, right? Short answer: your eyes. In the clip, you see (and hear) a guy saying "bah bah bah" over and over. BBCYour brain also gave the "fah" version a tan, for unknown reasons. This illusion is called the McGurk effect, and the creepiest part is that, even knowing know full well what's going on, you can't get your ears to hear the correct sound. #4. Oleksandr Pekur/Photos.com Wait, no. #3.
Approves First Scorpion Sting Antidote Get Consumer Updates by E-mail Consumer Updates RSS Feed Share copies of this article (623 KB) On This Page: “Once stung, twice shy” are words to live by in the Southwestern United States, where about 11,000 people a year are stung by scorpions in Arizona alone. Though rarely life threatening, scorpion stings can be extremely painful, causing numbness and burning at the wound site. Until now. Last year, the Food and Drug Administration approved the first treatment specifically for the sting of the Centruroides scorpion, the most common type in the United States. The biologic treatment—called Anascorp—was given a priority review because adequate treatment did not exist in the United States, says Karen Midthun, M.D., director of the FDA’s Center for Biologics Evaluation and Research. “This product provides a new treatment for children and adults and is designed specifically for scorpion stings,” Midthun says. back to top Bark Scorpion Scorpions are attracted to dark, moist spaces. Things to Know
Eye:optics, anatomy and accommodation: Physclips - Light The photoreceptor cells in the human retina are classified, by their shape, into rods and cones. Cones, which are responsible for colour vision, come in three types, called red, green and blue according to whether they respond most strongly to long, medium and short wavelengths. (Page on this still to come.) In this sketch, light arrives from the left, which means that light travels through the nerves on its way to the photo receptors. Medical Animation Library ©Copyright 2009 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites.
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