News tagged with hand
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 and is available under the GNU Free Documentation License.
In a study recently published in IEEE Transactions on Neural Systems and Rehabilitation Engineering, neurobiologists at the University of Chicago show how an organism can sense a tactile stimulus, in real time, through an art ...
Neuroscience May 10, 2013 | not rated yet | 0 |
Double-amputee Jason Koger used to fly to visit a clinician when he wanted to adjust the grips on his bionic hands. Now, he's got an app instead. Koger this week demonstrated the i-limb ultra revolution, ...
Other May 03, 2013 | not rated yet | 0
(Medical Xpress)—Robots are everywhere these days. They roam Mars, solve Rubik's cubes and vacuum our floors. Now, a robot named da Vinci is helping patients across the Penn State region get the major surgeries ...
Surgery Apr 25, 2013 | 5 / 5 (3) | 0 |
The world's first Brain Training Device has given a ray of new hope to the recovery of survivors after stroke. Developed by researchers of The Hong Kong Polytechnic University, this novel device can detect brainwave and control ...
Neuroscience May 16, 2013 | not rated yet | 0
Scientists from Royal Holloway University have found that when white Caucasians are under the illusion that they have a dark skin, their racial bias changes in a positive way.
Psychology & Psychiatry May 14, 2013 | 2 / 5 (1) | 0
Non-smokers should give hotels that allow smoking in certain rooms a wide berth, say the authors, and instead choose completely smoke free hotels.
Health May 13, 2013 | not rated yet | 0
Information from the senses has an important influence on how we move. For instance, you can see and feel when a mug is filled with hot coffee, and you lift it in a different way than if the mug were empty. ...
Neuroscience Apr 18, 2013 | not rated yet | 0
(HealthDay)—For those who aren't born with long, fluttery eyelashes, cosmetic extensions can help achieve that often sought-after look. But eye experts warn that the adhesives used to apply these eyelash ...
Health May 16, 2013 | not rated yet | 0
The Agency for Science, Technology and Research (A*STAR) and Veredus Laboratories, a leading supplier of innovative molecular diagnostic tools, announced the launch of VereTrop, the first biochip in the molecular diagnostics ...
Diseases, Conditions, Syndromes Apr 25, 2013 | not rated yet | 0