hand


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hand,

terminal part of the forelimb in primates. The human hand consists of the wrist, palm, four fingers, and thumb. In humans and other primates, the thumb is opposable, i.e., it can be moved into a position opposite to the other four digits. Opposable thumbs make possible precise movements such as grasping small objects. In vertebrates other than humans, the primary function of the hand is locomotion; the human hand, due to the evolutionary development of bipedalism, is freed for manipulative tasks. There are 27 bones in the human hand. The wrist, which joins the hand to the forearm, contains eight cubelike bones arranged in two rows of four bones each. The metacarpus, or palm, is composed of five long metacarpal bones. Fourteen phalangeal bones constitute the four fingers and thumb (three in each finger, two in the thumb). Ligaments interconnect the bones of the hand. The bones of the digits are anchored to muscles in the hand and to muscles in the arms and shoulders, through connections to tendons, permitting a wide range of movements. Among humans, the undersides of the fingers and palms have distinctive ridges, which improve grip and can be used as identification marks.

Hand

 

the terminal section of the upper extremity (arm) in man, capable of performing extremely delicate and differentiated movements.

The hand consists of the carpus, the metacarpus, and the digits. Of the eight bones of the carpus, which are arranged in two rows, three articulate with the bones of the forearm (the radiocarpal joint) and with those of the metacarpus, which make up the base of the hand. The basal phalanges of the fingers articulate with the metacarpal bones.

The fingers have great mobility. The first digit, or thumb, can be opposed to the remaining four digits. This is especially important for grasping and holding objects. Movement of the hand and fingers is made possible by muscles located both in the hand itself and in the forearm. The tendons of the hand muscles pass through the bone-fiber canals and are surrounded by sheaths that are longer in the first and fifth digits.

The muscles that move the hand and fingers are innervated by branches of the ulnar, radial, and median nerves. The hand receives its blood supply from the radial and ulnar arteries, which form deep and superficial arterial arches and plexuxes on the hand’s palmar surface. The deep and superficial venous networks pass into the antebrachial veins.

hand

[hand]
(anatomy)
The terminal part of the upper extremity modified for grasping.
(control systems)
(textiles)
The quality or feel of a fabric.

hand

1. The direction, left or right, of the swing of a door (when viewed from the side usually considered the outside) or associated doorframes or hardware. A left-hand door has hinges on the left and the door swings away; a left-hand reverse door swings toward the viewer. A right-hand door has hinges on the right and swings away. A right-hand reverse door swings toward the viewer.
2. Of a spiral stair, designates the direction of turn of the stair. Right-hand refers to a stair on which the user turns clockwise as he descends. Left-hand refers to a stair on which the user turns counter-clockwise ashe descends.

hand

1. 
a. the prehensile part of the body at the end of the arm, consisting of a thumb, four fingers, and a palm
b. the bones of this part
2. the corresponding or similar part in animals
3. 
a. the cards dealt to one or all players in one round of a card game
b. a player holding such cards
c. one round of a card game
4. a member of a ship's crew
5. a unit of length measurement equalling four inches, used for measuring the height of horses, usually from the front hoof to the withers

HAND

(chat)
Have A Nice Day. Often used sarcastically and in connection with HTH, as in:

> Where's the point of alt.stupidity?

Between the 't' and the 's'. HTH. HAND.

Hands

(dreams)
We express ourselves with our hands, and appropriate reading of body language is a valuable source of information. Likewise, in the dream state the hands may reveal information about emotions, intentions, and overt behaviors. For example, if in your dream you see clenched fists you may have much repressed anger. Sometimes extended hands suggest a need to develop close friendships. If the hands in your dreams are stroking you, you may be feeling sexy.
References in classic literature ?
He kept on turning to Raoul to see if he was holding his arm properly, showing him how he himself carried his hand as if always ready to fire, though the pistol was in his pocket.
There was something awful in his unconsciousness of the figure that could have put out its hand and touched him as he stooped over his labour.
At his feet had squatted his three old wives, the oldest of them, toothless and somewhat palsied, ever presenting to his hand, at his head nod, a basket rough-woven of pandanus leaf.
Thus then, my father, did Chaka the King, the greatest man who has ever lived in Zululand, and the most evil, pass by my hand to those kraals of the Inkosazana where no sleep is.
got from me what I had kept these three-and-twenty years and more, defending it against Moors and Christians, natives and strangers; and I always as hard as an oak, and keeping myself as pure as a salamander in the fire, or wool among the brambles, for this good fellow to come now with clean hands to handle me
Deiphobus tore the helmet from off his head, but Meriones sprang upon him, and struck him on the arm with a spear so that the visored helmet fell from his hand and came ringing down upon the ground.
Reaching over Daylight's shoulder, she picked up his hand and read it, at the same time shielding the faces of the five cards close to his chest.
Yer hands don't shake, and yer eyes don't look as if ye was tryin' ter hold back the Angel o' Death himself, when you're jest doin' yer DUTY, Mr.
But just then the wrist I held leaped from my hand, and the hand clasped like a steel trap about my wrist.
Suddenly, he clapped his large hand on the housekeeper's, like a trap, as she stretched it across the table.
Like the jed who had brought me, he was frightfully scarred, and also decorated with the breastplate of human skulls and dried dead hands which seemed to mark all the greater warriors among the Warhoons, as well as to indicate their awful ferocity, which greatly transcends even that of the Tharks.
Falling on his knees before the bed, he held his wife's hand before his lips and kissed it, and the hand, with a weak movement of the fingers, responded to his kiss.