As early as 2600 BC, there existed texts that described the diagnosis and treatment of 200 diseases in 3rd dynasty Egypt, believed to be written by Imhotep.
In 500 BC, Bian Que becomes the earliest physician known to use acupuncture and pulse diagnosis. Around the same time in India, Sushruta, a renowkned surgeon of ancient India, described over 120 surgical instruments, 300 surgical procedures and classified human surgery in 8 categories.
In 220 AD, Zhang Zhongjing publishes Shang Han Lun (On Cold Disease Damage), the oldest complete medical textbook in the world, focusing on diagnosis, treatment and prognosis.
In 1816, French Physicist Rene Laennec invents the stethoscope.
In 1853, the first syringe with a hypodermic needle was used in Scotland.
In 1895, Wilhelm Conrad Röntgen discovered medical use of X-rays in medical imaging.
In 1929, Hans Berger discovers human electroencephalography.
