“Every one of the twenty-eight bones of the human skull has been inherited in an unbroken succession from the air-breathing fishes of the pre-Devonian seas.” (Gregory, 1967)

I propose that psychiatry is an applied science and in addition something more. I believe the advances in its scientific content, over the last four decades, may have dazzled us into blindness, or at least made us inarticulate, about the dimension which does not fall within the boundaries of science. If that is true, the future of the subject is threatened by the neglect of one side of its foundations.

Empirical research concerning the relationship between life event stressors and schizophrenia is critically reviewed. In accordance with the view that patients suffering from schizophrenia are vulnerable to stress, there is evidence of a relationship between stressors and variation in severity of symptoms over time. There is less indication that schizophrenic patients have had higher levels of stressors than the general population or than patients suffering from other psychiatric disorders. These findings are consistent with vulnerability-stress models of the development of schizophrenia.

Research on the relationship between stress and schizophrenia is fraught with conceptual and methodological problems. These problems include issues related to the nature and measurement of stress, the likelihood of reciprocal influences between stress and symptoms, and the adequate assessment of symptoms. Several recommendations are made regarding future research in this area. These include using multiple and broadly based measures of different types of stressors and symptoms, greater use of truly prospective research designs, and the evaluation of the effects of interventions specifically designed to reduce stress in patients who suffer from schizophrenia.

Of 219 elderly patients with a major depressive disorder (meeting RDC), 69 recovered sufficiently and consented to enter a two-year double-blind placebo-controlled trial of dothiepin. Survival analysis revealed that dothiepin reduced the relative risk of relapse by two and a half times. Past but not current serious physical illness was also associated with a favourable outcome, whereas a prolonged index depressive illness trebled the relative risk of relapse. In the light of previous research on prognosis it is suggested that elderly persons who recover from a major depressive illness should continue with antidepressant medication for at least two years, if not indefinitely.

To test the hypothesis that depressed and schizophrenic patients have a common pathophysiological mechanism for hypofunction of the prefrontal cortex (‘hypofrontality’), we measured regional cortical blood flow (rCBF) in ten depressed patients, ten patients with schizophrenia, and 20 age- and sex-matched normal controls. Blood flow was measured during three different cognitive conditions: a resting state, a simple number-matching sensorimotor control task, and the Wisconsin Card Sorting test (WCS). The schizophrenic patients had lower prefrontal rCBF during the WCS. There were no differences in global or regional flow between the depressed patients and the normal subjects during any testing condition. Analysis of rCBF lateralisation showed that during the WCS normal subjects had relatively more left parietal blood flow than depressed patients, who had more right parietal blood flow. Since the testing condition that has most consistently revealed hypofrontality in schizophrenia (i.e. the WCS) was not associated with abnormal rCBF in the depressed patients, these data suggest that the pathophysiological mechanisms underlying prefrontal hypofunction in depression and schizophrenia are different.

Sixty-seven patients with bulimia nervosa and 29 patients with anorexia nervosa completed the Impulsiveness Questionnaire and questionnaires detailing severity of eating disorder. Bulimic patients had higher impulsivity scores than anorexic patients. Bulimics with high impulsivity scores did not have more severe eating disorders than low scorers. When 39 bulimics and 25 anorexics were interviewed about other impulsive behaviour, 51 % of bulimics and 28% of anorexics reported at least one other impulsive behaviour. Patients with so-called ‘multiimpulsive’ bulimia reported more severe eating disturbance, but this was not reflected on more reliable measures of symptoms. Thirty-nine bulimics entered an eight-week treatment trial and their progress was assessed at eight weeks, 16 weeks and one year. ‘Non-impulsive’ bulimics had a more rapid response than ‘impulsives' during treatment, but there was no difference at follow-up. There was no evidence of an association between high impulsivity trait scores and poor treatment response. It is concluded that impulsivity may shape the expression of eating disorders, but that ‘multi-impulsives' do not constitute a categorically distinct subgroup of bulimics.

Obsessional slowness is regarded as an uncommon but severely disabling variant of obsessive-compulsive disorder. This paper examines the psychopathology, classification, pathophysiology and treatment of obsessional slowness. It argues that primary obsessional slowness does not require classification as a separate syndrome because it can be found to be secondary to recognised phenomena of obsessive-compulsive disorder or anankastic personality disorder. The treatment described in the literature is not thought to be successful in the long term, and controlled trials are required to evaluate new strategies and antidepressant medication.

The increase in referrals to a new consultant psychiatrist within a teaching hospital was documented. During 1987/88 there were 279 consecutive referrals from physicians and surgeons (159 out-patients and 120 ward-consultation requests) which were compared with 184 consecutive GP referrals over the same period. Hospital referrals tended to be older, and less socially disadvantaged, but with psychiatric disorder of similar severity to GP referrals. They were more likely to have a concurrent physical diagnosis, and demonstrate somatisation. The latter was not confined to patients without physical disorder; half of the patients classified as ‘psychological reaction to physical disorder’ showed somatisation. ICD–10 appeared to perform better than ICD–9 or DSM–III for somatoform disorders, but a comprehensive classification system is still needed for liaison psychiatry. Personal discussion with the referring doctor was most common among the ward-consultation requests; in this situation the referring doctor usually continued primary management of the patient.

Despite reports of falling first-admission rates for schizophrenia in the UK and other Western countries, it would be rash to conclude that the incidence of schizophrenia is falling. An attempt was made to tackle the many methodological problems and sources of bias influencing the relationship between admission rates and incidence in an analysis of inception rates for schizophrenia and other psychoses in Edinburgh between 1971 and 1989. However it was calculated, the inception rate for schizophrenia fell significantly, but because there was evidence that diagnostic criteria for schizophrenia had narrowed between 1971 and 1989, and because a substantial and changing proportion of recorded first admissions were not true first admissions, it was impossible to conclude that the incidence of schizophrenia had fallen. Changes in the incidence of psychiatric syndromes are difficult to establish, particularly in retrospect, and future studies must pay more attention to the many possible confounding influences.

Repeated assessments of psychopathology, together with personality status, were made over two years on 181 psychiatric out-patients with generalised anxiety disorder (59), panic disorder (66), or dysthymic disorder (56) diagnosed using an interview schedule for DSM–III. Patients were randomly allocated to drug treatment, cognitive and behaviour therapy, or a self-help treatment programme. Although there were no overall differences in compliance rate and efficacy between the three modes of treatment, the psychological treatment methods, particularly self-help, were more effective in patients without personality disorder, and those with personality disorder responded better to drug treatment, primarily antidepressants. The findings suggest that assessment of personality status could be a valuable aid to selection of treatment in neurotic disorders and that self-help approaches are particularly valuable once personality disorder has been excluded.

The theory underlying medical classification is not always given sufficient regard. Here systematic methods developed in biology are summarised and compared with parallel developments in nosology. The classification of the functional psychoses is discussed as an example of a methodological problem in medicine. We consider that cladism could have a useful application in nosology, and could lead to classifications based on the concept of interrelationships of disease.

As a physician with a special interest in respiratory disease, I have been concerned with the semantic problems of my own specialty (Scadding, 1959, 1963) and of medicine generally (Scadding, 1967, 1972, 1975, 1988), and more recently have been invited to consider how far my approach may be applicable to psychiatry (Scadding, 1980, 1982, 1990). I therefore read the essay on nosology, taxonomy and classification of the functional psychoses by Parshall & Priest with interest, and venture to make the following observations.

Preferences for sugar/fat mixtures were examined in 12 anorectic females and in 14 normal-weight volunteer controls. The subjects, recruited at an eating-disorders clinic in Paris, were tested after an overnight fast and 2 hours after lunch. Anorectic patients disliked the taste of foods rich in fat more than did controls. Perceptions and preferences for sweet taste did not differ between anorectic females and controls. After lunch, taste preference ratings were equally reduced in both groups, suggesting that satiety aversion to sucrose is present even in anorexia nervosa.

Three cases of blood-letting in association with bulimia nervosa are reported. This association has not previously been described.

Of 51 long-term female in-patients receiving psychotropic drugs, 62% were overweight or obese, and 73% were centrally obese to a degree which could be dangerous to their health. The patients also had waist: hip ratios which were significantly higher than expected for their age and obesity (P < 0.01).

A case of complete Ganser syndrome resolved after one week, but was immediately followed by a major depressive episode. The two disorders had a common cause, which is best encapsulated in a psychodynamic formulation.

Munchausen's syndrome in a man of subnormal intelligence is described. The case is unique for the extent of detailed, corroborated history. This man has been a voracious consumer of NHS and other services, and an estimate has been made of his cost to the health and prison services. The case raises various ethical, forensic, and resource issues.

A 12-year-old Indian boy presented to a psychiatric unit with catatonia. He was subsequently diagnosed to have Wilson's disease. Symptoms improved on treatment with penicillamine, zinc sulphate, and benzodiazepines.