A 32-year-old woman with schizophrenia is reviewed by the psychiatry team. When assessing her negative symptoms, which of the following is the most common negative symptom encountered in schizophrenia?

Explanation

## Most Common Negative Symptom in Schizophrenia **Key Point:** Affective flattening (restricted range and intensity of emotional expression) is the most commonly observed negative symptom in schizophrenia, present in the majority of patients with significant functional impairment. ### Prevalence and Characteristics of Negative Symptoms | Negative Symptom | Prevalence | Definition | Clinical Presentation | |---|---|---|---| | Affective flattening | 60–70% | Reduced emotional expression | Blunted facial expressions, monotone voice, minimal gesturing | | Alogia | 50–60% | Poverty of speech | Minimal spontaneous speech, brief responses, lack of elaboration | | Avolition | 40–50% | Loss of motivation | Apathy, lack of goal-directed activity, poor self-care | | Anhedonia | 40–50% | Loss of pleasure | Inability to experience joy, reduced interest in activities | **High-Yield:** Affective flattening is: - The most persistent negative symptom across the illness course - Often the most visible to observers (family, clinicians) - Highly correlated with poor social and occupational functioning - Responds poorly to antipsychotics compared to positive symptoms **Clinical Pearl:** Negative symptoms are more resistant to treatment than positive symptoms. While antipsychotics reduce hallucinations and delusions effectively, negative symptoms often persist and require psychosocial interventions (cognitive remediation, social skills training, supported employment). **Mnemonic — The 5 A's of NEGATIVE symptoms:** **A**ffective flattening, **A**logia, **A**volition, **A**nhedonia, **A**ttention deficit. Affective flattening is the most prominent and persistent. ### Distinction from Depression | Feature | Affective Flattening (Schizophrenia) | Depression | |---|---|---| | Emotional experience | Reduced capacity to feel | Sad mood present but may hide it | | Facial expression | Truly blunted | May appear sad or withdrawn | | Response to antidepressants | Poor | Good | | Response to antipsychotics | Modest | None | **Warning:** Do not confuse affective flattening with depression. In schizophrenia, the patient has a reduced capacity to experience and express emotion; in depression, the emotional experience is present but mood is low. This distinction is crucial for treatment selection. [cite:DSM-5 Schizophrenia Spectrum and Other Psychotic Disorders; Kaplan & Sadock's Synopsis of Psychiatry 11e Ch 5]