CME INDIA Presentation by ⚜ Dr. M. Gowri Sankar, MD, Senior Assistant Professor, Dept. of General Medicine, Government Medical College and ESI Hospital, Coimbatore.

Today’s History Feature:

Dr. Louis Ranvier

(Oct 2, 1835 – Mar 22, 1922)

💠French Anatomist & Histopathologist

His contributions…

🔹Ranvier studied medicine at Lyon and graduated in 1865. After his studies, he joined to work under Dr. Claude Bernard, a French physiologist, who was one of the founders of Experimental Medicine. Later, he became a chair of anatomy in 1875.

🔹Subsequently, Dr. Ranvier became a prominent figure in the field of histology due to his extraordinary work. He further collaborated with his close friend Dr. Andre Victor Cornil and established a private laboratory.

🔹There, they conducted courses in histology for medical students. Dr. Cornil educated pathological anatomy, whereas, Dr. Ranvier taught normal anatomy. 

🔹In fact, his dynamic way of approaching the study of microscopic anatomy popularized his laboratories as a World centre for students of histology.

🔹His Eponyms…

🔅 Nodes of Ranvier – A constriction in the myelin sheath that encases nerve fibres, occurring at regular intervals along their length

🔅 Ranvier’s Segment – The portion of a myelinated nerve fibre between two nodes of Ranvier

🔅 Merkel-Ranvier Cells – Melanocyte like cells in the basal layer of the epidermis which contains catecholamine granules

🔅 Ranvier’s Tactile Disks – A special type of sensory nerve endings

🔅 Ranvier’s Plexus – A sub-basal stroma plexus of the cornea

🔹Furthermore, Dr. Ranvier and Dr. Cornil jointly wrote the famous text book Manual of Pathological Histology in 1869, which became a milestone of 19th-century medicine.

A Day to Commemorate

An Eminent Histopathologist of 19th Century

Dr. Louis Ranvier 🙏🏼

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