From lecture transcript to teaching system

The term \emph{disorder} is ubiquitous in clinical psychology, psychiatry, and neuropsychology, yet its conceptual basis is frequently assumed rather than argued. This paper develops lecture-style notes for PSYC 3910 (Brain Dysfunction and Recovery) that place the question ``What is a disorder?'' prior to specific neuropsychological syndromes. Using classic debates in the philosophy of psychiatry and instructive neurological case phenomena (e.g., anosognosia, somatoparaphrenia, amnesia, delusional misidentification, phantom limbs), the notes distinguish description from explanation, observation from inference, and mechanistic account from moral judgment. The central aim is methodological: to cultivate disciplined skepticism toward both uncritical medicalization (the fallacy that naming a pattern explains it) and skeptical dualism (the fallacy that value-laden boundaries imply a lack of biological basis). The paper proposes a practical framework for evaluating disorder claims: (i) specify the target phenomenon, (ii) clarify the normative standard invoked, (iii) separate impairment, distress, and social deviance, (iv) identify the evidential bridge from brain observations to dysfunction claims, and (v) articulate potential falsifiers. Finally, it argues that neuropsychology’s greatest pedagogical contribution is not a catalog of deficits but a logic of inquiry: natural experiments reveal the normally invisible computational and representational work of the nervous system, thereby reframing ``what is wrong?'' into ``what must the intact system do to make ordinary experience possible?''

This paper examines the fundamental principles of nutrition, diet, and chrononutrition within the context of health psychology, tracing the evolutionary trajectory of human dietary patterns from hunter-gatherer societies to modern industrialized food systems. The analysis encompasses the critical evaluation of nutritional science, particularly examining methodological flaws in dietary research exemplified by the diet-heart hypothesis controversy. The paper explores energy balance principles, the historical transition from foraging to farming, and the implications of industrialized food production on human health outcomes. Special attention is given to chrononutrition, the timing of food intake, and its relationship to circadian rhythms. Through critical examination of case studies, including the work of Ancel Keys and subsequent challenges to established dietary guidelines, this paper highlights the importance of scientific rigor in nutritional research and the potential consequences of institutional bias in dietary recommendations. The discussion emphasizes the need for evidence-based approaches to nutrition that account for human physiological evolution and individual dietary variability.

Stress is often discussed as if it were inherently pathological, purely psychological, and eliminable through willpower or environmental change. Health psychology, however, emphasizes that stress is an evolutionarily ancient, physiologically instantiated, and generally adaptive response that supports survival by coordinating rapid behavioral and metabolic reconfiguration. This manuscript develops a set of lecture notes that treat stress, distress, crisis, trauma, and suicidal behavior as points along a continuum of increasing dysregulation---that is, increasingly costly ``failure modes'' of an otherwise protective system. Beginning with foundational definitions, the paper integrates autonomic nervous system dynamics, hypothalamic--pituitary--adrenal (HPA) axis physiology, and cognitive appraisal mechanisms to clarify why stress cannot be eliminated, why it is not merely ``in the mind,'' and why it commonly generalizes across life domains. We then propose a conceptual sequence: adaptive stress as problem-focused mobilization; distress as the failure of available coping strategies; crisis as disruption of core expectations and world-models; trauma as unresolved or repeatedly reactivated crisis leading to persistent prediction errors and hypervigilance; and suicide as a potential end-stage solution attempt when suffering becomes appraised as inescapable. The framework is situated within the health psychology perspective that focuses on population-level determinants and prevention through systemic redesign, particularly in contexts of evolutionary mismatch where symbolic and chronic stressors outpace the recovery capacities shaped by ancestral environments. Practical implications are offered for education, work design, social support infrastructures, and time-sensitive suicide prevention strategies.