Presentation, vertex
In a vertex presentation, the top of the baby’s head comes first at delivery. The vertex here refers specifically to the top of the head The word “vertex” in Latin means a “whirlpool, whirlwind.” Why “top of the head”? Because the hairs on the top of the head often form a whorl, a whirl-like pattern.
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- Presenteeism
depression, back pain, arthritis, heart disease, high blood pressure, and gastrointestinal disorders. An example of presenteeism might ibe an employee who suffers from depression and so is less able to work effectively. And another example might be the employee with a migraine headache who may have difficulty looking at a computer screen. In a sense, […]
- Pressor
Causing a rise in blood pressure. A pressor base is a substance (chemically classified as a base) capable of raising the blood pressure. A pressor nerve is a nerve that, when stimulated, increases the blood pressure. A pressor reflex is a nerve reflex that constricts arterioles (small blood vessels) and thereby increases the blood pressure. […]
- Pressor substance
A substance that elevates the arterial blood pressure. For example, prostacyclin (prostaglandin PGI2) is a potent pressor substance. In medicine, pressor refers to raising the blood pressure. The word comes from the French verb “presser” meaning “to exert pressure” or “to squeeze.”
- Pressure neuropathy
“Pinching” a nerve by putting too much pressure on it. For example, the sciatic nerve may be painfully compressed by a ruptured disc in the lower spine, causing sciatica. Pressure neuropathy is also called nerve compression. In pressure neuropathy there is excessive pressure on a nerve root or a peripheral nerve leading to ischemia (not […]
- Pressure sore
A sore area of skin that develops when the blood supply to it is cut off for more than two to three hours due to pressure on it and lack of movement. As the skin dies, the pressure sore first appears as a red painful area, which in time turns purple. Left untreated, the skin […]