History of Herophilus

advertisement
About this period, in a distant corner of the Greek empire - at the medical school in
Alexandria, Egypt, the human body was purposefully dissected in order to reveal its
internal structure. Here, Herophilus (c.300B.C. - ) and Erasistratus (c.250B.C. - )
made many anatomical discoveries through routine dissection of more than 600
cadavers, and allegedly condemned criminals. The Roman scholar Celsus (c.30 B.C. 45 A.D.) wrote that the criminals were obtained “for dissection alive, and
contemplated, even while they breathed, those parts which nature had before
concealed.” According to the historian Tertullian as many as 600 living criminals were
vivisected, and even fetuses were removed from the womb. He described Herophilus
as “that butcher who cut up innumerable corpses in order to investigate nature and
who hated mankind for the sake of knowledge.”
Herophilus is often called the “father of anatomy.” All of his writings, including his
book “On Anatomy” has been destroyed. Herophilus described the delicate arachnoid
membranes of the cerebral ventricles, the confluence of venous sinuses near the
internal occipital protuberance which bears his name, the lacteals, coverings of the
eye, liver, uterus, epididymis, and many other structures. The name “duodenum” is
attributed to him. Herophilus differentiated nerves of sensation from those
associated with voluntary movement, and he knew that damage of the latter led to
paralysis.
The younger Erasistratus was more a physiologist. He formulated a “pneumatic
theory” and regarded the heart as a pump. Erasistratus described the auricles of the
heart, cardiac valves, blood vessels, including the aorta, pulmonary artery and veins,
hepatic arteries and veins, renal vessels, superior and inferior vena cava, and the
azygous vein. Erasistratus recognized the function of the trachea. He also
differentiated the cerebrum from the cerebellum, described the cerebral
convolutions, ventricles, and meninges.
Alexandria began its decline with the Roman invasion in 48 B.C., climaxed by the
burning of its famous library of 700,000 volumes. At that time the library housed all
the learning of the ancient World. Egypt became part of the Roman empire, and
medicine was still nurtured by Greek and other scholars but culturally in a Roman
environment. Human dissection was forbidden or not encouraged - a situation that
lasted until the late middle ages. Like in some medical schools today, it was declared
unnecessary in the training of physicians. The greatest figure of the time was the
physician Claudius Galen (AD131 - 201).
Download
Related flashcards
Cardiology

71 Cards

Heart diseases

42 Cards

Create flashcards