Recognizing symptoms of Parkinson's disease
April is Parkinson's Disease Awareness Month, which make this a good time to learn about the symptoms of Parkinson's disease.
Apr 26, 2024
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April is Parkinson's Disease Awareness Month, which make this a good time to learn about the symptoms of Parkinson's disease.
Apr 26, 2024
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Nearly 20% of fresh, frozen and canned fruits and vegetables that Americans eat contain concerning levels of pesticides, a new report finds.
Apr 18, 2024
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A high street voucher scheme has been shown to be helpful in supporting new mothers, who stopped smoking during their pregnancy, to maintain abstinence from smoking in their first year postpartum.
Apr 17, 2024
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If you reward a monkey with some juice, it will learn which hand to move in response to a specific visual cue—but only if the cerebellum is functioning properly. So say neuroscientists at the University of Pittsburgh School ...
Apr 4, 2024
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Homes have become 'too clean' and could benefit from the introduction of 'healthy germs' which introduce friendly bacteria to potentially stave off a host of childhood illnesses, including asthma, experts suggest.
Mar 18, 2024
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Major life changes can affect personality, and the COVID-19 pandemic was the rare big life event that all humans shared together.
Mar 12, 2024
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African American patients with carpal tunnel syndrome (CTS) are less likely than others to receive surgical treatment, reports the March issue of Plastic and Reconstructive Surgery.
Mar 7, 2024
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The "stomach bug" is unfortunately making the rounds these days. Norovirus rates in the Northeast are now at their highest levels since April, according to the CDC. The positive "stomach flu" rates in the Northeast are currently ...
Feb 27, 2024
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If you've been bit by a stomach bug lately, you're not alone. The Centers for Disease Control and Prevention (CDC) is reporting significant norovirus activity across the country, especially in the West and Northeast.
Feb 27, 2024
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A global anti-tobacco meeting opens in Panama on Monday to halt the harmful consequences of smoking, as tobacco companies endeavor to hook more users—including children—with addictive products.
Feb 3, 2024
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A hand (med./lat.: manus, pl. manūs) is a prehensile, multi-fingered extremity located at the end of an arm or forelimb of primates such as humans, chimpanzees, monkeys, and lemurs. A few other vertebrates such as the koala (which has two opposable thumbs on each "hand" and fingerprints remarkably similar to human fingerprints) are often described as having either "hands" or "paws" on their front limbs.
Hands are the chief organs for physically manipulating the environment, used for both gross motor skills (such as grasping a large object) and fine motor skills (such as picking up a small pebble). The fingertips contain some of the densest areas of nerve endings on the body, are the richest source of tactile feedback, and have the greatest positioning capability of the body; thus the sense of touch is intimately associated with hands. Like other paired organs (eyes, feet, legs), each hand is dominantly controlled by the opposing brain hemisphere, so that handedness, or the preferred hand choice for single-handed activities such as writing with a pen, reflects individual brain functioning.
Some evolutionary anatomists use the term hand to refer to the appendage of digits on the forelimb more generally — for example, in the context of whether the three digits of the bird hand involved the same homologous loss of two digits as in the dinosaur hand.
The hand has 27 bones, 14 of which are the phalanges (proximal, medial, and distal) of the fingers. The metacarpal is the bone that connects the fingers and the wrist. Each human hand has 5 metacarpals.
This text uses material from Wikipedia, licensed under CC BY-SA