Webmedigo

Hiccups and myths Remembered! Our grandmothers use to tell when we get hiccups it means someone is missing us or someone is remembering us... Do you really believe them all ! Myths are many but there is a scientific evidence for hiccups... It's not exactly what they said, hiccups or (hichkki) is a involuntary movement of the diaphragm a cavity which separates the chest cavity from the abdomen which creates the eratic noise. The involuntary contractions of diaphragm causes brief closure of vocal chords which results in characteristic sound of hiccups. Causes of hiccups The exact cause of hiccups is not known bit it is believed that it is caused due to Being anxious or thrilled Eating irritated food Sudden change in temperature

Science behind the sneezing  Sneezing is a physiologic response to the irritation of the respiratory epithelium lining of the nose. The process usually begins with the release of chemicals such as histamine or leukotrienes. These substances are manufactured by inflammatory cells such as eosinophils and mast cells typically found within the nasal mucosa. Chemical release is caused by viral respiratory infections, filtered particles, allergens (substances that trigger allergic reactions) or physical irritants such as smoke, pollution, perfumes and cold air.  Allergic reactions with the nasal mucosa require the presence of IgE (allergy antibody specific for the allergen). This leads to fluid leakage from vessels in the nose, causing symptoms of congestion and nasal drip. Additionally, nerve endings are stimulated, leading to the sensation of itching. Ultimately, the nerve ending stimulation leads to activation of a reflex inside the brain. The nervous impulse travels up

Why we yawn? I have always been fascinated by yawning and what purpose it has to our bodily function, if any. Do we yawn out of boredom? Tiredness? Or some other reason? Yawning as a phenomenon has many people searching for the reasons of why we actually do it. In fact, the powerful contagious nature of yawning has puzzled researchers for decades. A yawn is an involuntary reflex where the mouth is opened wide, and the lungs take in a lot of air. The air is then exhaled slowly. During this time, the eardrums stretch, and the eyes may also close tight, causing them to water. No thought or action has to be taken to produce a yawn, and the process is similar for everyone. Yawning commonly occurs either before or after sleep, which is why it is usually considered a sign of being tired. Yawning also occurs frequently in people who are doing boring or tedious things. There is also a social aspect to yawning. Yawning appears to be contagious among humans and other animals,

Why do we cry? Scientists have been trying to answer this question for centuries. In 1662, Danish scientist Niels Stensen discovered that tears originate in the lacrimal gland.  We have three distinct types of tears: Basal tears. Reflex tears. Emotional tears.  Basal tears: In healthy mammalian eyes, the cornea is continually kept wet and nourished by basal tears. They lubricate the eye, and help to keep it clear of dust. Reflex tears: results from irritation of the eye by foreign particles, or from the presence of irritant substances such as onion vapors, perfumes and other fragrances, tear gas, or pepper spray in the eye's environment, including the cornea, conjunctiva, or nasal mucosa, which trigger TRP channels in the ophthalmic nerve. Emotional tears: Most researchers believe that emotional tears—triggered by strong feelings such as joy and sadness—are unique to humans. While there is a lot of crying research currently underway, we