Adolph Meyer’s Psychobiology in Historical Context, and Its Relationship to George Engel’s Biopsychosocial Model

Before addressing the importance of Adolf Meyer and the question of his impact on the biopsychosocial model of the psychoanalytical internist George Engel, let us tersely sketch the history of functionalism in medicine/psychiatry, and of the nineteenth/early twentieth century’s progressive abandonment of it in favor of basic science reductive models of “disease,” not illness.

Functionalism

Whereas Hippocratic physicians diagnosed diatheses in terms of humoral excesses or deficiencies, their primary emphasis was on the ill person. They began with careful histories of the patient’s complaints and his or her daily life course, customary activities, typical foods and beverages imbibed, and the exacerbation or relief of symptoms associated with any or all of these. They also asked questions about his physical and social environment. They carefully looked for any clinically pertinent signs, and might physically examine the patient or his excretions. When they arrived at a diagnosis (say, an excess of yellow or black bile, or of blood or phlegm), they would educate the patient about it and discuss possible approaches. Although leeching, emetics, or purgatives might be prescribed, “dietetics” was the core of the treatment. Much more than recommendations about dietary intake, this involved conversations about “lifestyle” management in general: exercise, fresh air, habit changes, and perhaps bathing in mineral waters or spas. If the patient were “melancholic” (which then included what we would now consider a variety of psychiatric disorders), he or she might be prescribed daily swimming and other forms of vigorous exercise, conversations with a philosopher, attendance at theatrical comedies, or even referral to an Asklepian temple for “incubation sleep” and priestly dream interpretation. Often doctors worked closely with physical trainers, to whom they sent their patients. In short, their orientation was holistic (“mind”/”body” integration), directed first and foremost toward an individual ill person.

In the second century, C.E. Galen, despite his humoral and anatomical pathologies, was similarly holistic or functionalist. He resorted to a variety of physical examinational methods while also attending to the patient’s mental/emotional status. He described one case where he was attending a woman for syncopal episodes. His examinations of her included his customary attention to the pulse. During one evening session, a servant entered and happened to mention that he had just seen the handsome Pylades dancing. Suddenly her pulse became irregular and she fainted straight away. This led Galen to consider love sickness, and perhaps not humoral or organ pathology. He tested his hypothesis during subsequent visits. Whenever another dancer or actor was mentioned, her pulse remained regular and her sensorium alert, but when Pylades was mentioned the irregular pulse and fainting recurred. Because she was married, Galen realized her insoluble conflict, and treated her accordingly.

From the fall of Rome until the rise of University Medicine in the later Middle Ages, medical lore and doctoring was in monastic hands—each monastery had its clerical medic, who might also attend outsiders. They were attuned to the traditional triad of major mental disorders—mania, melancholia, and phrenitis—which they explained somatically. However, they also encountered lesser mental/emotional disorders for which they developed their own nosology. “Scrupulosity,” for example, characterized a committed monk with an unrealistic sense of sinfulness and guilt—which often drove him to self-mortification such as flagellation, hair shirts with chains underneath, and so forth, for which the remedy was kindly pastoral counseling. “Accedia” was akin to our “dysthymia,” whose sufferer was affected by sadness, lassitude, and impaired capacity to carry out the monastic routine. This was viewed as straddling the boundary between sickness and sin. Routine physical labor (“occupational therapy”) and prayers, confession, penance, and “pep talks” were prescribed.

When universities with medical schools arose in the latter Middle Ages, students’ educations were mostly bookish and theoretical. Hippocratic and Galenic somatic orientations were still preeminent. (Vesalius would not publish his illustrated anatomical text until 1543.) Dietetics and purgatives, bloodletting, and so on were still favored treatments. Nevertheless, doctors gave considerable time and attention to their patients as ill...