Chovan Figino's portrait of Leonardo da Vinci depicts the artist's right hand wrapped in cloth like a sling. Chovan Figino /KDSP Museum of Garieri Dell' Accademia "At the end of his career, Leonardo da Vinci's ability to use his right hand seemed to be hindered-this problem has always been thought to be caused by a stroke. But a new analysis shows that the nerve injury in his hand caused this paralysis. In a paper published in the Journal of the Royal Medical Association today (May 3), two Italian doctors believe that Leonardo da Vinci's hand paralysis may be caused by traumatic nerve injury after the artist fainted. Their conclusion is based on the analysis of the portrait of Leonardo da Vinci in16th century.

Leonardo da Vinci is left-handed, but previous studies, including new handwriting analysis, show that he is also good at using his right hand. The newspaper said that although he mostly writes and draws with his left hand, there is evidence that he usually draws with his right hand. Five things you may not know about Leonardo da Vinci

This portrait of the new analysis center, painted in red chalk by Italian artist Giovan Ambrogio Figino in the 6th century A.D./Kloc-0, depicts an elderly Leonardo da Vinci. The author wrote in the paper that in this picture, the famous erudite's right arm was wrapped in a cloth similar to a bandage, and his right hand was "hung in a stiff and contracted posture". In other words, his fingers are slightly bent inward.

However, they wrote that the hand painted in the portrait did not depict the typical "clenched hand" of patients with muscle contraction caused by stroke. On the contrary, "this photo shows another diagnostic method, such as ulnar paralysis, commonly known as claw hand," co-author Dr. Davide Lazzeri, an expert in plastic reconstruction and cosmetic surgery at the clinic in Rome, said in a statement:

Ulnar nerve paralysis refers to the finger bending like an animal's paw due to the injury of ulnar nerve. The ulnar nerve is a main nerve extending from the neck to the fingers, which gives people the feeling and motor ability of the lower arm and hand. Pontella Hospital in Italy believes that his ulnar nerve paralysis may be caused by trauma, such as fainting and falling.

Lazzeri said, more importantly, because Leonardo didn't have cognitive decline or any other sports problems, stroke is unlikely to be the cause.

"Ulnar paralysis" may explain why he left many incomplete paintings in his painting career in the past five years, including Mona Lisa, while he continued to teach and paint, "Lazzeri said.

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