Hands and fingers can accomplish whatever the mind conceives. Their dexterity coupled with our talents allows us to paint, write, carve, cook, throw and even turn our emotions into actions. Wondrous parts of the body they are.
Think of the nurse’s hands holding a syringe or a suture, some tools needed to make a patient well. The muscles in the shoulders are involved in lifting those hands to accomplish whatever task the nurses want to accomplish.
The deltoids and humerus of the shoulders and upper arms connect with the muscle tissue of the triceps and biceps in the upper arms. These in turn connect with the extensor and adductor muscles in the forearm.
Several specialized tendons connect the forearm muscles with the eight bones that comprise the wrist, as well as the delicate bones of the fingers, the metacarpals (which connect to the knuckles), and the three phalange bones that make up the rest of your fingers and thumbs.
From the shoulder to the hands, all the muscles are engaged as the doctors and nurses use needles and thread or staples to heal patients. In addition, the despite protective surgical gloves.2,500 nerve endings in our hands allow for sensitivity of touch from hot-cold, smooth-rough, soft-hard, textures, contours... Click To Tweet
We can see a Galacti-provided scan of a hand moving. The bones, tendons, and muscles work in concert and the nerve endings light up in order to show their presence. We have always taken their motion for granted: we assume that bones and muscles will do their jobs smoothly and without ceasing.We take the motion of hands for granted: we assume that bones and muscles will do their jobs smoothly and without ceasing. Click To Tweet
We observe 3-D images of hands performing various common activities: they paint a wall by using their muscles and phalanges to grasp a brush, throw a ball underhand, carve wood using their fine motor ability, type on a computer (like I do as I write up this journey), work with a hammer and nail, chop in-season vegetables, and stir soup.
Hands touch and feel the patients’ skin. They beat drums. Hands grip everything from bananas to spoons to bicycle handles. They clap, one of their many expressions. We applaud the doctors. Hands enable us to defend ourselves, and they also communicate.
We watch the American Sign Language sign for the word “hands.” A deaf person moves them in a straight line across each other and outward, holding her hands upright with the palms facing her.
We make the “OK” sign back to her. As we experienced at the beginning of this stage of our journey, handwriting is another way we communicate with our hands; it is another way in which we transmit knowledge.
An ancient scribe from Greece appears in our midst. He is about to communicate his own knowledge in his own fashion. His fingers flex as they curl around a hammer in one hand and a chisel in the other. He carves letters of the Greek alphabet to form a word he translates as “gnosis,” or knowledge. Here, hands are being used to “write” in stone.
Galacti makes the ancient Greek scribe vanish. The thirty dedicated muscles of the hand working with its twenty-seven bones make movements at the guidance of the three different nerves.
We anticipate perfectly how much force is needed to hold a tissue or throw a ball, while the muscles stabilize our grip. The flexor muscles, for example, close the fingers to make a fist or to curl around a rope when doing rope-climbing exercises.
In addition, the unique thumb muscles allow the digit to move independently and oppose or parallel the position of the fingers—as in our rope-climbing example—or while working a BlackBerry.
In that case, the fingers cradle the phone while the thumb operates it. Other muscles allow the fingers to spread apart and bend at the first knuckle, a position that allows us to play scales on a piano or type on a computer, as mentioned.
When we stop to think about all the other actions, our hands can perform, the catalog is extensive: weaving, welding, gripping the wheel of a car, making and repairing jewelry, sewing, mining ore, harvesting wheat (as we saw in our exploration of flora), lighting candles, repairing lamps, making lamps, carving chess pieces, creating integrated circuits, pouring chemicals in a beaker, measuring those sensitive chemicals with precision, using a telescope to locate galaxies, using a microscope to examine stomach bacteria . . . the list goes on.
As Galacti notes, we may all be amazed when a chimpanzee uses a tool, or a bird constructs elaborate nests with its beak, or a dog opens a door with its paw, but the sheer range of handiwork humans can produce deserves more consideration than we give it in our daily life.The sheer range of handiwork humans can produce deserves more consideration than we give it in our daily life Click To Tweet
Certainly, when it comes to the deliberate work parents do in caring for their children, such as changing diapers, brushing hair, applying bandages, or teaching a child how to garden, the mothers and fathers in our group can appreciate those actions!
As the doctors examine the car accident victim with their healing hands, we notice the feminine body from a scientific perspective, and we pause for a moment to reflect on men’s and women’s anatomy.
This post is an excerpt from chapter 8.7 of Inventory of the Universe.
The Explanation Blog Bonus:
Today I have a couple of videos. This first one shows what a robot can accomplish and then what real hands actually do and feel. Hands really are amazing parts of our bodies.
Watch this incredible hand dexterity. Yet, we all have everyday capacities with our hands and don’t realize the variety and extent of what our hands allow us to do.
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