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Scraping a chalkboard (also known as a blackboard) with one's fingernails produces a sound and feeling which most people find extremely irritating. The basis of the innate reaction to the sound has been studied in the field of psychoacoustics (the branch of psychology concerned with the perception of sound and its physiological effects).
HAVS, also known as vibration white finger (VWF) or dead finger, [1] is a secondary form of Raynaud's syndrome, an industrial injury triggered by continuous use of vibrating hand-held machinery. Use of the term vibration white finger has generally been superseded in professional usage by broader concept of HAVS, although it is still used by the ...
The red flush is due to reactive hyperemia of the areas deprived of blood flow. In pregnancy, this sign normally disappears due to increased surface blood flow. Raynaud's has occurred in breastfeeding mothers, causing nipples to turn white and painful. [9] Nipple blanching, or vasospasm of the nipple, can cause pain and difficulty breastfeeding.
Dementia is a devastating condition that impacts up to 10 percent of older adults. And while there's no cure, getting diagnosed early can help patients get on a treatment plan and families prepare.
Sensitivity to light or sound. Difficulty reading or speaking. Hyperactivity. While some of these behaviors, particularly cravings, were once thought of exclusively as migraine triggers, "there's ...
As time went on, it kept getting worse, lighting its way up from my hand into my entire arm. The doctor took an X-ray of my arm, which — knowing what I know now — isn't helpful in the case of ...
It is a pronation–supination tremor that is described as "pill-rolling"; that is, the index finger of the hand tends to get into contact with the thumb, and they perform a circular movement together. [1] [2] Such term was given due to the similarity of the movement in PD patients with the former pharmaceutical technique of manually making ...
Again, it’s completely normal to feel like you’re not the best version of yourself when it’s later in the day, especially for older adults. That goes double over the holidays, when everyone ...