The abuse of students is ingrained in medical education, and has shown little amelioration despite numerous publications and righteous declarations by the academic community over the past decade. The culture of abuse conflicts with the renewed commitments of medical educators and practice professionals to imbue students with a higher degree of professionalism and cultural sensitivity. The authors describe the profiles of student abuse, drawn from recent national surveys of medical students using the AAMC Medical School Graduation Questionnaire, and focus on the most common forms of reported mistreatment--public belittlement and humiliation--that appear to be misguided efforts to reinforce learning. Along with others, the authors believe that the use of aversive methods to make students learn and behave is likely to foster insensitive and punitive behaviors that are passed down from teacher to learner, a "transgenerational legacy" that leads to future mistreatment of others by those who themselves have been mistreated. The undesirable result is compounded when these behaviors are adopted and directed toward patients and colleagues. The authors advocate more concerted action to curtail the abuse of medical students, citing current and proposed accreditation standards that will be employed more stringently by the LCME, and propose a series of more assertive actions that schools should take. The authors stress that the attitudes, behaviors, and values that students acquire in medical school are as much the products of their socialization as the outcomes of curricular design and pedagogy, and implore medical educators to tidy up the environment for learning.

The authors review the methods by which U.S. medical schools have evaluated student achievement during the twentieth century, especially for the assessment of noncognitive abilities, including clinical skills and behaviors. With particular reference to the current decade, information collected by the Liaison Committee on Medical Education (LCME) is used to examine the congruence of assessment methods with the rising tide of understanding--and accreditation requirements--that knowledge, competence, and behavioral objectives require different methods of assessment to measure the extent of students' learning in each domain. Amongst 97 medical schools having accreditation surveys between July 1993 and June 1998, only 186 of 751 basic science courses tested students' noncognitive achievements in things such as the preparation for and participation in small-group conferences, the quality of case-based discussion, library research and literature reviews, and research projects, despite staking out scholarship, habits of life-long learning, and reasoned thinking as educational objectives. In the clerkships of these schools, structured and observed assessments of clinical skills--with standardized patients and/or OSCEs--contributed 7.4-23.1% to a student's grade (depending on the clerkship discipline), while the predominant contribution (50-70% across the clerkships) was made by resident and faculty ratings that were based largely on recollections of case presentations and discussions having little relationship to interpersonal skills, rapport with patients, and logical and sequenced history taking and physical examination. On a more optimistic note, the results show that the number of schools using standardized patients in one or more clerkships increased between 1993 and 1998 from 34.1% to 50.4% of the 125 schools in the United States, and the number of schools using standardized patients in comprehensive fourth-year examinations increased from 19.1% to 48% of the total. Despite such progress, this study shows that too many medical schools still fail to employ evaluation methods that specifically assess students' achievement of the skills and behaviors they need to learn to practice medicine. The findings of this article explain why accreditors are paying closer attention to how well schools provide measured assurances that students learn what the faculties set out to teach.

Using national databases of the Association of American Medical College, the authors employed logistic regression analysis to show the relative predictive influences of selected demographic, structural, attitudinal, and educational variables on the specialty careers choices of 1995 U.S. medical school graduates. Plans to pursue certification in family practice or an unspecified generalist career could be predicted with moderate success, while choices of general internal medicine and general pediatrics could not. The intentions of the 1995 graduates to pursue generalist specialty, were significantly associated with demographic factors such as female gender, older student age, and rural hometown; early interest in the generalist specialties; attitudes favoring helping people over seeking opportunities for leadership, intellectual challenge, or research; the presence of a department of family medicine in the medical school; and ambulatory care experiences in the third and fourth years. In the multiple-regression models used in this study, a number of factors widely touted as important to the cultivation of generalism were not significant predictors of generalist decisions; an institutional mission statement expressly addressing the cultivation of generalist careers; giving admission preferences to applicants who vowed an interest in generalism; public (versus private) school sponsorship; discrete organization units for general internal medical or general pediatrics; the proportion of institutional faculty in the general specialty of medicine and pediatrics; the level of educational debt; the students; clinical experiences in the first and second years of medical school. The authors acknowledge the danger of inferring causal relationships from analyses of this kind, and described how the power of previous associations--e.g., that between a required third-year clerkship in family medicine and graduates' family practice career choices--may be weakened when the independent variable spreads across institutional cultures that at present are less conductive to primary care. The findings of this analysis add to the evidence that generalist career intentions are largely carried on the tide of students' interests and experiences in family medicine and ambulatory primary care. In terms of the predictive values of the input variable in this study, career decisions for the other two generalist specialties--general internal medicine and general pediatrics--were essentially a crapshoot, either because the tactics to promote interest in these fields were ineffective (or confounded), or because the efforts were underdeveloped. Moreover, the statistical models of this study employed quantifiable variables that can be discerned and manipulated to guide the result, whereas medical students tend to identify less tangible elements as more powerful factors influencing their career choices. The results sharpen the strategic focus, but must be combined with those of other, descriptive analysis for a more complete understanding of graduating...

Rhythmic activity in Purkinje fibers of sheep and in fibers of the rabbit sinus can be produced or enhanced when a constant depolarizing current is applied. When extracellular calcium is reduced successively, the required current strength is less, and eventually spontaneous beating occurs. These effects are believed due to an increase in steady-state sodium conductance. A significant hyperpolarization occurs in fibers of the rabbit sinus bathed in a sodium-free medium, suggesting an appreciable sodium conductance of the "resting" membrane. During diastole, there occurs a voltage-dependent and, to a smaller extent, time-dependent reduction in potassium conductance, and a pacemaker potential occurs as a result of a large resting sodium conductance. It is postulated that the mechanism underlying the spontaneous heart beat is a high resting sodium current in pacemaker tissue which acts as the generator of the heart beat when, after a regenerative repolarization, the decrease in potassium conductance during diastole reestablishes the condition of threshold.Recent studies suggest that the spontaneous heart beat depends on specific generator properties of cardiac pacemaker tissue. The membrane potential changes in pacemaker fibers are characteristic of a tissue exhibiting spontaneous excitation. At the pacemaker, the membrane potential in diastole is not constant, but shows a spontaneous, slow depolarization (pacemaker potential) to the threshold of the propagated impulse. Dudel and Trautwein (1958) have proposed that the pacemaker potential is the resultant of the interaction of two factors: (a) a significantly high membrane conductance for sodium, which is considered a specific property of pacemaker fibers responsible for the generation of the spontaneous heart beat; b) changes in potassium conductance during repolarization and diastole leading to slow diastolic depolarization, bringing the potential to the firing level. FitzHugh (1960) and Noble (1960) have computed solutions for the Hodgkin-Huxley nerve equa3x7