Inclusive Anatomy
Historical Timeline
2nd Century CE
2nd Century CE
Galen
Galen described cavities within the brain corresponding to the ventricular system, recognizing communication between the lateral ventricles.[1]
Alexander Monro Secundus
1783
Alexander Monro Secundus published Observations on the Structure and Functions of the Nervous System, providing a detailed anatomical description of the channels connecting the lateral ventricles to the third ventricle.[1] His account acknowledged earlier descriptions by Galen, leading to later debate regarding eponymic attribution.[1,2]
Present
Eponym:
The interventricular foramen is commonly known as the Foramen of Monro, named after Alexander Monro Secundus (1733–1817), a Scottish physician and anatomist.[2]
Monro received his Doctor of Medicine degree from the University of Edinburgh in 1755 and became a licentiate of the Royal College of Physicians of Edinburgh in 1758.[3] He was a founding member of the Harveian Society of Edinburgh in 1782 and served as its president in 1785.[3] Although trained as a physician and not a surgeon, Monro delivered comprehensive annual lecture courses in anatomy and surgery from 1759 to 1800, significantly influencing medical education in Scotland.[3]
Scientific Contributions:
Alexander Monro Secundus made major contributions to neuroanatomy and physiology. In his 1783 work, he described the anatomical relationships of the brain’s ventricles and emphasized their communication.[1]
Monro is also associated with what later became known as the Monro–Kellie doctrine, which proposes that the cranial cavity maintains a constant volume and that changes in the volume of one intracranial component (brain tissue, blood, or CSF) must be compensated by changes in another.[4] This concept remains fundamental to modern neurophysiology and clinical neurology.
Alexander Monro Secundus - Image Obtained From: Wikimedia Commons (Public Domain)
References
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Monro A. Observations on the Structure and Functions of the Nervous System. Edinburgh; 1783. doi:10.11588/diglit.4812
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Sharp JA. Alexander Monro Secundus and the interventricular foramen. Med Hist. 1961;5(1):83-89. doi:10.1017/s0025727300025941
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Watson Wemyss HL. A Record of the Edinburgh Harveian Society. T. & A. Constable; 1933.
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Moore N. Monro, Alexander (1733–1817). In: Dictionary of National Biography. Vol 38. Smith, Elder & Co; 1894:180-181.
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