Thursday, May 4, 2017

Leonardo da Vinci's Vetruvian Man remains as the Ideal Human Figure .


The Vitruvian Man describes the proportions of the human body based on ancient Roman architect Vitruvius’ treatise De architectura on the correlations of ideal human proportions with geometry the human figure as being the principal source of proportion among the classical orders of architecture. Leonardo's drawing is traditionally named in honor of the architect.
Dr Abe V Rotor

A drawing by Leonardo da Vinci around 1490 is accompanied by notes based on the work of the architect Vitruvius depicts a man in two superimposed positions with his arms and legs apart and inscribed in a circle and square. The drawing and text are sometimes called the Canon of Proportions or Proportions of Man. In his illustration of this theory, the so-called Vitruvian Man, Leonardo demonstrated that when a man places his feet firmly on the ground and stretches out his arms, he can be contained within the four lines of a square, but when in a spread-eagle position, he can be inscribed in a circle.

This image demonstrates the blend of mathematics and art during the Renaissance. It demonstrates Leonardo's deep understanding of proportion. In addition, this picture represents a cornerstone of Leonardo's attempts to relate man to nature. He believed the workings of the human body to be an analogy for the workings of the universe."

According to Leonardo's preview in the accompanying text, written in mirror writing, it was made as a study of the proportions of the (male) human body as described in Vitruvius. The text is in two parts.

The first paragraph of the upper part reports Vitruvius: "Vetruvio, architect, puts in his work on architecture that the measurements of man are in nature distributed in this manner, that is:

· a palm is four fingers
· a foot is four palms
· a cubit is six palms
· four cubits make a man
· a pace is four cubits
· a man is 24 palms

The second paragraph reads: "if you open your legs enough that your head is lowered by one-fourteenth of your height and raise your hands enough that your extended fingers touch the line of the top of your head, know that the center of the extended limbs will be the navel, and the space between the legs will be an equilateral triangle".

The lower section of text gives these proportions:

· the length of the outspread arms is equal to the height of a man
· from the hairline to the bottom of the chin is one-tenth of the height of a man
· from below the chin to the top of the head is one-eighth of the height of a man
· from above the chest to the top of the head is one-sixth of the height of a man
· from above the chest to the hairline is one-seventh of the height of a man.
· the maximum width of the shoulders is a quarter of the height of a man.
· from the breasts to the top of the head is a quarter of the height of a man.
· the distance from the elbow to the tip of the hand is a quarter of the height of a man.
· the distance from the elbow to the armpit is one-eighth of the height of a man.
· the length of the hand is one-tenth of the height of a man.
· the root of the penis is at half the height of a man.
· the foot is one-seventh of the height of a man.
· from below the foot to below the knee is a quarter of the height of a man.
· from below the knee to the root of the penis is a quarter of the height of a man.
· the distances from below the chin to the nose and the eyebrows and the hairline are equal to the ears and to one-third of the face.


The points determining these proportions are marked with lines on the drawing. Below the drawing itself is a single line equal to a side of the square and divided into four cubits, of which the outer two are divided into six palms each, two of which have the mirror-text annotation "palmi"; the outermost two palms are divided into four fingers each, and are each annotated "diti". Leonardo is clearly illustrating Vitruvius' De architectura which reads:

For the human body is so designed by nature that the face, from the chin to the top of the forehead and the lowest roots of the hair, is a tenth part of the whole height; the open hand from the wrist to the tip of the middle finger is just the same; the head from the chin to the crown is an eighth, and with the neck and shoulder from the top of the breast to the lowest roots of the hair is a sixth; from the middle of the breast to the summit of the crown is a fourth. If we take the height of the face itself, the distance from the bottom of the chin to the under side of the nostrils is one third of it; the nose from the under side of the nostrils to a line between the eyebrows is the same; from there to the lowest roots of the hair is also a third, comprising the forehead. The length of the foot is one sixth of the height of the body; of the forearm, one fourth; and the breadth of the breast is also one fourth. The other members, too, have their own symmetrical proportions, and it was by employing them that the famous painters and sculptors of antiquity attained to great and endless renown.

Similarly, in the members of a temple there ought to be the greatest harmony in the symmetrical relations of the different parts to the general magnitude of the whole. Then again, in the human body the central point is naturally the navel. For if a man be placed flat on his back, with his hands and feet extended, and a pair of compasses centred at his navel, the fingers and toes of his two hands and feet will touch the circumference of a circle described therefrom. And just as the human body yields a circular outline, so too a square figure may be found from it. For if we measure the distance from the soles of the feet to the top of the head, and then apply that measure to the outstretched arms, the breadth will be found to be the same as the height, as in the case of plane surfaces which are perfectly square. 

Leonardo's drawing combines a careful reading of the ancient text with his own observation of actual human bodies. In drawing the circle and square he correctly observes that the square cannot have the same center as the circle, the navel, but is somewhat lower in the anatomy. This adjustment is the innovative part of Leonardo's drawing and what distinguishes it from earlier illustrations. He also departs from Vitruvius by drawing the arms raised to a position in which the fingertips are level with the top of the head, rather than Vitruvius's much lower angle, in which the arms form lines passing through the navel.

The drawing itself is often used as an implied symbol of the essential symmetry of the human body, and by extension, of the universe as a whole.

It may be noticed by examining the drawing that the combination of arm and leg positions actually creates sixteen different poses. The pose with the arms straight out and the feet together is seen to be inscribed in the superimposed square. On the other hand, the "spread-eagle" pose is seen to be inscribed in the superimposed circle. (Acknowledgement: Wkipedia)

The Vitruvian Man describes the proportions of the human body based on ancient Roman architect Vitruvius’ treatise De architectura on the correlations of ideal human proportions with geometry the human figure as being the principal source of proportion among the classical orders of architecture. Leonardo's drawing is traditionally named in honor of the architect. This composite drawing shows the enormous range of application of the Vitruvian Man in both man-made structures and the natural order of the universe. 

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Leonardo envisaged the great picture chart of the human body he had produced through his anatomical drawings and Vitruvian Man as a cosmografia del minor mondo (“cosmography of the microcosm”). He believed the workings of the human body to be an analogy, in microcosm, for the workings of the universe. Leonardo wrote: “Man has been called by the ancients a lesser world, and indeed the name is well applied; because, as man is composed of earth, water, air, and fire…this body of the earth is similar.” He compared the human skeleton to rocks (“supports of the earth”) and the expansion of the lungs in breathing to the ebb and flow of the oceans.

In his illustration of this theory, the so-called Vitruvian Man, Leonardo demonstrated that when a man places his feet firmly on the ground and stretches out his arms, he can be contained within the four lines of a square, but when in a spread-eagle position, he can be inscribed in a circle. (Internet)

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