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A medical illustration from 'Atlas and Text-book of Human Anatomy' (by Dr. Johannes Sobotta) shows, on the right, the arteries and nerves of the palm (middle layer)(the palmar aponeurosis has been removed and the abductor pollicis brevis divided along the superficial volar branch of the radial artery) and, on the left, the arteries and nerves of the palm (deep layer), 1911. The abductor and abductor pollicis and the flexor digiti quinti have been divided; the tendons of the flexors, the median nerve, the superficial volar branch of the ulnar nerve, and the superficial volar arch have been removed. (Photo by VintageMedStock/Getty Images)