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Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

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Asthma cases in Americans are about 75% higher today than they were in 1980.

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In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

The Major Divisions of the Peripheral Nervous System The Major Divisions of the Peripheral Nervous System
Cyanosis as shown here at the patient’s fingertips results from a lack of oxygen in the tissues Cyanosis as shown here at the patient’s fingertips results from a lack of oxygen in the tissues
Three patterns of axonal regeneration in mammalian peripheral nerves. Three patterns of axonal regeneration in mammalian peripheral nerves.
Quacking. Tapotement performed with the hands together and fingers loosely apart. Fingers come ... Quacking. Tapotement performed with the hands together and fingers loosely apart. Fingers come ...
Apply L stroke on terminus. Place your index and middle fingers on the left and right terminus; ... Apply L stroke on terminus. Place your index and middle fingers on the left and right terminus; ...
(A) Massage the ears between thumb and fingers. (B) Gently pull on ears. (A) Massage the ears between thumb and fingers. (B) Gently pull on ears.
Video: Stress and Immune System Animation

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