[Speech markers as objective indicators of apathy: New insights from a case study].

Introduction: Apathy, commonly observed in neurocognitive disorders, is characterized by a reduction in goal-directed behavior with a reduction of initiatives interests and emotions. This article presents the case of Mrs. B., a 70-year-old patient with mild neurocognitive disorder and apathy, who underwent an intervention combining transcranial direct current stimulation (tDCS) and cognitive training delivered through a web application.

Observations: After four weeks, clinical scales and self-report questionnaires revealed: reduced intensity in emotional blunting, increased interest, and decreased fatigue, although apathy remained stable according to the apathy diagnostic criteria. These changes were corroborated by vocal analyses, which showed improved prosody, increased speech rate, and fewer pauses. Changes in prosodic and temporal markers appeared to align with the behavioral improvements reported by the patient.

Discussion: These findings highlight the potential of prosodic and temporal speech markers to assess and monitor apathy. This innovative approach may enhance clinical evaluations and support the development of more tailored interventions.