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Manifestaciones Clínicas

Anu M Kumar1, Yi Lu Murphy2, Amanda Cook Maher1

  • 1University of Michigan, Ann Arbor, MI, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Los adultos mayores con carga elevada de amiloide (Aβ) en el cerebro muestran una menor rectitud en la conducción, lo que indica un posible deterioro cognitivo temprano. Esto sugiere que la precisión en la conducción puede ser un indicador temprano de riesgo de enfermedad de Alzheimer.

Palabras clave:
carga de amiloidedeterioro cognitivoprecisión de conducciónenfermedad de Alzheimeradultos mayores

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Área de la Ciencia:

  • Neurología; Gerontología; Biomarcadores de Enfermedades

Sus antecedentes:

  • El deterioro cognitivo y la enfermedad de Alzheimer (EA) pueden manifestarse como cambios sutiles en el rendimiento de tareas complejas, como la conducción.; La variabilidad en la rectitud de la conducción puede servir como un indicador temprano de cambios cognitivos.; Este estudio investiga la rectitud de la conducción en relación con la carga de amiloide (Aβ) en el cerebro, un biomarcador clave para la EA.

Objetivo del estudio:

  • Evaluar la rectitud de la conducción en adultos mayores con y sin carga elevada de amiloide (Aβ) en el cerebro.; Determinar si la precisión de la conducción se asocia con marcadores preclínicos de la enfermedad de Alzheimer.; Evaluar el potencial del comportamiento de conducción como método de detección temprana del deterioro cognitivo.

Principales métodos:

  • Se recopilaron datos vehiculares de adultos mayores cognitivamente normales (edad ≥65) con y sin carga elevada de Aβ (determinada por la escala de centiloides de PET).; Se analizaron los datos de rumbo del sistema de posicionamiento global (GPS) utilizando regresión lineal en ventanas móviles para calcular los residuos absolutos medios (MAR) de la trayectoria de conducción predicha.; Se compararon las diferencias de MAR y velocidad entre los grupos positivo y negativo para Aβ utilizando pruebas t de muestras independientes.

Principales resultados:

  • Los conductores negativos para Aβ generalmente mostraron un MAR más bajo, lo que indica una mayor precisión en la conducción.; Los conductores positivos para Aβ mostraron un MAR significativamente mayor en carreteras urbanas y de subdivisión más largas, lo que significa una mayor desviación de la trayectoria recta.; Los conductores positivos para Aβ demostraron dificultad para mantener velocidades más altas en ciertos tipos de carreteras en comparación con los conductores negativos para Aβ.

Conclusiones:

  • Las personas cognitivamente normales con carga elevada de Aβ muestran una variabilidad significativa en la rectitud de la conducción, con mayores desviaciones de la trayectoria prevista.; Los hallazgos sugieren que la positividad para amiloide se asocia con una precisión de conducción deteriorada y una capacidad de velocidad reducida, particularmente en segmentos de carretera más largos.; La rectitud de la conducción puede servir como un marcador sensible y no invasivo para la detección temprana de cambios cognitivos relacionados con la enfermedad de Alzheimer.