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PubMedDate not supplied

Abdominal hernias: imaging review and historical perspectives.

Many eminent anatomists originally described abdominal hernias, some of which are still named after the original authors. In this article, the radiologic features of abdominal hernias are reviewed as imaged on x-ray, ultrasound, multidetector computed tomography, and magnetic resonance imaging. Recognition of the typical appearance of various types of abdominal hernias and associated adverse features such as bowel obstruction, perforation, strangulation, or volvulus formation can help in formulating an accurate diagnosis. A short biography of the scientists associated with eponymous hernias and their other important scientific contributions are also described.

Hernia, Abdominal↗

PubMed2002

Nomenclature of the veins of the lower limbs: an international interdisciplinary consensus statement.

An agreement on anatomic terminology is the foundation for a common language in medical science and for an effective exchange of information. A thorough review of the literature has shown need for revision and extension of the official terminologia anatomica with regard to the veins of the lower limb. The foundation of this consensus document was laid by the faculty at a precongress meeting of The Fourteenth World Congress of the International Union of Phlebology (IUP), held in Rome on September 8-9, 2001, under the auspices of the IUP, the International Federation of Associations of Anatomists (IFAA), and the Federative International Committee on Anatomical Terminology (FICAT). The official names of some veins have been changed according to the guidelines of the FICAT. In addition, previously unnamed veins have received names relevant to their anatomy and clinical significance. Some of the terminology recommendations are innovative, but were judged to be correct by members of the committee.

Anatomy↗

PubMed2000

Measuring the thickness of the human cerebral cortex from magnetic resonance images.

Accurate and automated methods for measuring the thickness of human cerebral cortex could provide powerful tools for diagnosing and studying a variety of neurodegenerative and psychiatric disorders. Manual methods for estimating cortical thickness from neuroimaging data are labor intensive, requiring several days of effort by a trained anatomist. Furthermore, the highly folded nature of the cortex is problematic for manual techniques, frequently resulting in measurement errors in regions in which the cortical surface is not perpendicular to any of the cardinal axes. As a consequence, it has been impractical to obtain accurate thickness estimates for the entire cortex in individual subjects, or group statistics for patient or control populations. Here, we present an automated method for accurately measuring the thickness of the cerebral cortex across the entire brain and for generating cross-subject statistics in a coordinate system based on cortical anatomy. The intersubject standard deviation of the thickness measures is shown to be less than 0.5 mm, implying the ability to detect focal atrophy in small populations or even individual subjects. The reliability and accuracy of this new method are assessed by within-subject test-retest studies, as well as by comparison of cross-subject regional thickness measures with published values.

Cerebral Cortex↗

PubMed2001

Evaluation of the medical curriculum: why, when, by whom and for whom should questionnaires be used.

The undergraduate medical curriculum has been modified or even totally reorganized in many countries in recent years, and there are plans to make departmental budgets and the salaries of university professors partially dependent on the outcome of teaching. Questionnaires are often used in such situations as a means of curriculum evaluation. Based on our own experience such evaluations should be done not only during and immediately after a course in the curriculum, but also at later time points, e.g., at the end of the undergraduate and also the postgraduate phase. The clinical relevance of lectures and courses can only be graded adequately after some years of clinical experience. Gross anatomy was graded top at all time points evaluated and reached higher levels of 'clinical relevance' than other typical preclinical and even clinical subjects. Efforts should be made to obtain a high response rate for representative results. After modifying parts of a course detailed questionnaires should also include space for students' suggestions. The results of such evaluations are not only relevant to the head of department as feedback on the individual lecturers but also important for the curriculum committee and the dean. Anatomists should utilize these evaluations to improve teaching.

Anatomy↗

PubMed2003

Aspects of the history of the nerves: Bell's theory, the Bell-Magendie law and controversy, and two forgotten works by P.W. Lund and D.F. Eschricht.

The French physiologist François Magendie showed, in 1822, that the anterior roots of the spinal nerves are motor and the posterior sensory. The English anatomist Charles Bell claimed the discovery, but his claim was based on republications of papers in which the wording had been altered to be consistent with Magendie's findings. Bell also appropriated Herbert Mayo's discoveries of the functions of the fifth and seventh cranial nerves. Bell repeated his claims in a number of influential publications, supported by his brothers-in-law John and Alexander Shaw. And for a century and a half, Bell figured as the discoverer in most references to the subject. During this period, several reviewers did go back to Bell's original papers, disclosing Bell's falsifications in the republished texts. But Magendie was not definitely acknowledged as the discoverer of the function of the spinal nerve roots until Cranefield's (1974) treatise. Cranefield, as did all other reviewers, overlooked accounts from 1825 by P.W. Lund and F.D. Eschricht. They critically reviewed Bell's early publications and reached conclusions similar to those of Cranefield concerning the roles of Bell and Magendie in the discovery of the function of the spinal nerve roots.

Anatomy↗

PubMed1999

Gustaf Retzius and Camillo Golgi.

Gustaf Retzius (1842-1919), the Swedish anatomist and anthropologist, and Camillo Golgi were contemporaries. They met on several occasions and came in closer contact when Golgi, together with Ramon y Cajal, was awarded the Nobel Prize in Physiology or Medicine in Stockholm in 1906. Retzius came from an illustrious family. His father was professor of anatomy at Karolinska Institutet and Gustaf himself made a fast career. At 35, he was appointed to a professorship in histology, especially created for him at Karolinska Institutet, and later he became professor of anatomy in the same institution. Retzius was exceedingly productive, and published more than 300 scientific papers, most of which dealt with the nervous system and sensory organs. The majority of these were included in his magnificent volumes Biologische Untersuchungen, Neue Folge (Biological Investigation, New Series), which appeared from 1890 to 1921, and in Das Gehororgan der Wirbelthiere ("The Acoustic Organ of Vertebrates", 1881 and 1884), which may be his internationally better know contribution. Much of his work, especially on invertebrates, was based on Ehrlich's methylene blue method, but he also used the Golgi method early on. Particularly his studies of the innervation of the sensory organs became of great importance for the support of the neuron doctrine. His standing internationally was reflected in his membership in many of the most prominent academies abroad, as well as in invitations to him to give a "Croonian Lecture" in 1908 and "The Huxley Lecture" in 1909.

History, 19th Century↗

PubMed2005

A simple interactive teaching aid for medical undergraduates studying the brachial plexus.

In an era where the methods and time dedicated to the teaching of human anatomy are changing within medical curricula worldwide it behoves anatomists to devise alternative strategies to effectively teach the discipline to medical students. Most medical curricula would necessitate that students learn the innervation of the upper limb and therefore would be expected to understand the concepts of root values, trunks, divisions, cords and branches of the brachial plexus. In order to aid this process the author has designed a very simple teaching aid that has had universal student approval. The model, constructed from perforated pin board, wood and coloured wires, is designed to be an adjunct to prosection or dissection-based practical classes, tutorials and didactic lectures. The aim of this short paper is to describe this teaching aid and its value in transmitting important anatomical concepts to medical undergraduates. The usefulness of the model is not restricted to medical teaching but may also prove valuable in anatomical studies undertaken by paramedical disciplines and science students.

Audiovisual Aids↗

PubMed2002

Lorenz Oken and Naturphilosophie in Jena, Paris and London.

Although Lorenz Oken is a classic example of Naturphilosophie as applied to biology, his views have been imperfectly understood. He is best viewed as a follower of Schelling who consistently attempted to apply Schelling's ideas to biological data. His version of Naturphilosophic, however, was strongly influenced by older pseudoscience traditions, especially alchemy and numerology as they had been presented by Robert Fludd, whose works were current in Jena and available to him. According to those influences, parts of Oken's philosophical conception were communicable even in a non-idealistic scientific culture, for example in Paris, where Oken met Etienne Geoffroy Saint-Hilaire. Geoffroy however was embedded in a French intellectual tradition, and the correspondence between his views and those of Oken was only superficial. The English anatomist Richard Owen attempted to incorporate the views of Oken and Geoffroy within his own, idiosyncratic system. Although Darwin knew of Oken's ideas, it was Geoffroy who really affected his evolutionary biology, and any influence of Oken must have been attenuated to the point of triviality.

Biology↗

PubMed2001

The trigeminal nerve. Part IV: the mandibular division.

The mandibular or third division of the trigeminal nerve is the largest of the three divisions. It is considered a mixed nerve. That is, like the ophthalmic and maxillary divisions, the mandibular conveys afferent fibers. But unlike the former two divisions, the mandibular also contains motor or efferent fibers to the muscles of mastication, the mylohyoid and anterior digastric muscles, and the tensor veli palatini and tensor tympani muscles. So intimately associated with dentistry, the mandibular nerve has also been termed the dental nerve by anatomists in the past. This extensive and complicated division of the trigeminal nerve can cause confusion to both patient and doctor. Pain is often referred within its branches and even into other trigeminal divisions, chiefly the maxillary. This fourth and last article about the trigeminal nerve will present in detail the mandibular division.

Branchial Region↗

PubMed2004

An early illustrated comparative anatomy of the brain: Samuel Collins' A Systeme of Anatomy (1685) and the emergence of comparative neurology in 17th century England.

The concept of comparing of the brains of various animals and of individual human brains was launched in the last half of the 17th century in England and was much influenced by the formation of the European scientific societies and their attempts to guide naturalist observations into a new systematics. An ambitious attempt to document this trend in an extensively illustrated work of encyclopedic pretensions was the singular publication of Samuel Collins (1618-1710), an energetic anatomist and president of the Royal College of Physicians. His little known tow-volume folio presentation, written in teh vernacular for broad acceptance, contains the seeds of a science of comparative neurology with the largest collection of brain illustrations (as well as of other organ systems) attempted in his era. Although lacking the conceptual insight that might derive from a true "comparative" anatomy and an understanding of the relations of different animals, the handsome engravings exemplified the new direction of the 'enlightenment' of the scientific revolution and are discussed in teh context of relevant events of this period.

Anatomy, Comparative↗

PubMed2006

The impossible interview with the man of the hidden biological structures. Interview by Paolo Mazzarello.

This paper presents an "impossible interview" to Professor Camillo Golgi, placed in time in December 1906. The Italian Professor Golgi from Pavia has been awarded the Nobel Prize for Physiology or Medicine ex aequo with the Spanish anatomist Santiago Ramón y Cajal. Both scientists have obtained the award for their work on the anatomy of the nervous system. However, they have opposite views on the mechanisms underlying nervous functions. Golgi believes that the axons stained by his "black reaction" form a continuous anatomical or functional network along which nervous impulses propagate. Ramón y Cajal is the paladin of the neuron theory, a hypothesis questioned by Golgi in his Nobel lecture of Tuesday, December 11. After the ceremony, an independent journalist has interviewed Professor Golgi in the Grand Hotel in Stockholm. Excerpts about his education, his main scientific discoveries, and his personal life are here given (reconstructing the "impossible interview" on the basis of Golgi's original writings).

Anatomy↗

PubMedDate not supplied

Pineal gland, perennial puzzle.

Since antiquity this tiny intracranial appendicular organ has aroused sexual connotations and denials. Controversial and enigmatic, it played a significant part in the development of endocrinology and even neurosurgery. What was its histology, what was its role as a gland so intimately attached to the brain? What did comparative anatomists make of it in the light of its function as a 'third eye?' Mysticism and the famous Cartesian apothegm placed it in the center of Eastern and Western approaches to the mind-body problem and to mental disorders. The latter were connected with the common calcifications, so helpful in the radiological diagnosis of brain shifts due to mass lesions. Undefeated, even spurred by continuing uncertainties, researchers keep looking into this 'photo-neuro-endocrine transducer.'

Brain↗

PubMed1996

Domus Willisi: a neuro-architectural tour.

Fifteen sites in England today can be identified with Dr. Thomas Willis, the Oxford physician and anatomist, who was the founder of neurology. Four of these were domiciles; Beam Hall, where Willis and his colleagues met to study the brain and nerves, can be claimed as the first Neurological Institute. The last dwelling place of Willis is Westminster Abbey, where in 1961 his memorial stone was renewed by neurologists and neurosurgeons. Part of this original stone marks the new Brain Imaging Centre at the Montreal Neurological Institute, where the name of Thomas Willis shares a place in the Hall of Neurological Fame.

History, 17th Century↗

PubMed1996

Winslow's contribution to our understanding of the cervical portion of the sympathetic nervous system.

Jacques Bénigne Winslow (1669-1760) was one of the most brilliant anatomists of the XVIIIth century. Though having Danish origins, he spent most of his life in Paris where he held the chair of anatomy of the Jardin du Roy between 1742 and 1758. Among his numerous contributions in the field of human anatomy, the "Exposition anatomique de la structure du corps humain" (1732) had a great influence on anatomical literature for over a century. Winslow's description of the sympathetic nervous system had a significant importance to the understanding of this controversial part of the nervous system. The structure and distribution of the cervical part of the sympathetic nervous system, as described in his textbook (edition of 1752), were analyzed in the light of our current knowledge. It appears that Winslow not only modified the terminology by replacing the term "intercostal nerve" by that of the "great sympathetic nerve", but also knew, with a few exceptions, the systematization of the cervical ganglia and their branches. The name of Winslow is therefore undissociable from the history of the sympathetic nervous system.

Denmark↗

PubMed1997

Medieval neuroanatomy: the text of Mondino dei Luzzi and the plates of Guido da Vigevano.

The Italian anatomists Mondino dei Luzzi (c. 1275-1326) and Guido da Vigevano (c. 1280-1349) must be regarded as pivotal figures in the history of medieval anatomy. Mondino's book (written in 1316 and published in 1478) was the first treatise of anatomy based on the dissection of human cadavers, whereas the plates of Vigevano's manuscript (1345) marked the beginning of a new trend which became increasingly widespread during the following centuries: the use of anatomical illustration in textbooks. Though their neuroanatomical descriptions are rather simple and somewhat difficult to correlate with current descriptions, analysis of these works sheds new light on the knowledge of brain and spinal cord anatomy in the Middle Ages (Olry, 1996). Vigevano's contribution to neuroanatomy, however, appears more important than that of Mondino dei Luzzi, probably because his anatomical illustrations often compelled the draftsman to break free from Galen's dominating influence.

Brain↗

PubMed2005

Manuel Garcia Jr: a clear-sighted observer of human voice production.

Before Garcia, only a few notions of vocal production can be found in earlier singing treatises. In those days the authors wrote mainly upon the art of ornamentation and the rules of good language utterance. In the beginning of the 19th century, a radical change occurred with the development of scientific experiments. Several doctors or physicists drew up theories on human voice production, which were similar to those of sound production in woodwind instruments: flute, reed, or membranous lips. Yet, as the experiments on living human beings were impossible, the true nature of the vocal source remained under discussion. In addition, specific questions arose in regard to singing: Are the different registers produced by different vibrating sources or are they due to modifications of a single vibrating system? What are the reasons for a variation in loudness and in pitch, and how are the variations of voice timbre produced? Facing the contradictory opinions of the most famous scientists, Manuel Garcia Jr showed an astonishing insight as early as 1840, when he wrote his first 'Mémoire sur la voix humaine' presented to the Académie des Sciences de Paris. Being altogether an anatomist, a singer, and a great pedagogue, he could accurately observe the physiological phenomena of human voice in the right way. As the first user of the laryngoscope, he wrote a second paper presented at the Royal Society of London, in 1855, in which he confirmed his previous views. All along the different issues of his well-known singing method, we may see the lucidity and the improvements of Garcia's ideas. The only concession he made to the singers is related to the famous 'Fausset-tête' register, an unfortunate word that was bound to induce confusion later.

Anatomy↗

PubMed2003

Skelettestreit.

Michael Stolberg claims there was a broad movement in the sixteenth century toward sexing skeletons and offers Felix Platter's singular 1583 female skeleton and Caspar Bauhin's 1597 reproduction of that skeleton as evidence. He admits that these illustrations did not become a standard feature of anatomical textbooks, though he maintains (erroneously) that the descriptions of these skeletons became "canonical." Stolberg does not appreciate the extent to which Platter's female skeleton was an anomaly. Distinctively female-sexed skeletons flooded Europe after about 1730, and, importantly, anatomists at the time perceived that these depictions were radically new. Indeed, widespread and protracted debates erupted over the exact features of the female skeleton. These anatomical illustrations emerged within a novel political climate, where sex in the body was newly seen as grounding gender roles in new social regimes. The story of the European study of sexual differences is not one of slow and steady accretion of positive knowledge, as Stolberg implies. That story is fraught with changing reinterpretations and relocations of difference, and new meanings attached to new kinds of sameness and difference within differing cultural contexts. It is wrong to judge foundational shifts in scientific culture merely by firsts.

Anatomy↗

PubMed2000

The fourfold Democritus on the stage of early modern science.

The renewed success of ancient atomism in the seventeenth century has baffled historians not only because of the lack of empirical evidence in its favor but also because of the exotic heterogeneity of the models that were proposed under its name. This essay argues that one of the more intriguing reasons for the motley appearance of early modern atomism is that Democritus, with whose name this doctrine was most commonly associated, was a figure of similar incoherence. There existed in fact no fewer than four quite different Democriti of Abdera and as many literary traditions: the atomist, the "laughing philosopher," the moralizing anatomist, and the alchemist. Around the year 1600 the doctrines of these literary figures, three of whom had no tangible connection with atomism, began to merge into further hybrid personae, some of whom possessed notable scientific potential. This essay offers the story of how these Democriti contributed to the rise of incompatible "atomisms."

Alchemy↗