TY - JOUR PY - 2023// TI - Age-related changes in prepulse inhibition of the startle response JO - Frontiers in psychiatry A1 - de Oliveira, Yasmin Guedes A1 - Poltronieri, Bruno Costa A1 - Woodruff, Erica A1 - da Costa, Brunno Freitas A1 - Panizzutti, Rogerio Arena SP - e1145783 EP - e1145783 VL - 14 IS - N2 - INTRODUCTION: Acoustic prepulse inhibition of the startle response (PPI) is a phenomenon characterized by the reduction in the startle reflex caused by the presence of weak and brief stimulus before an intense and sudden stimulus (pulse). These phenomena can be observed in several species, but in humans it is commonly measured by the eyeblink using electromyography. PPI works as an operational measure of sensorimotor gating, which is the ability to suppress motor responses for sensory stimulus. Healthy aging is marked by several changes in neural processing, like inhibitory functioning decline. In this line, PPI measure can be a potential biomarker for changes related to the aging process.

METHODS: In this research we aim to investigate if PPI is reduced with aging and if this reduction would be associated with cognitive functioning of older adults. To this aim, we compared PPI levels of older adults (over 60 years old) with PPI levels of young adults (from 18 to 28 years old).

RESULTS: With that, we found, significantly lower PPI level (F[1,25] = 7.44 p = 0.01) and lower startle amplitude startle amplitude: (U = 26.000 p = 0.001) in older adults than in young adults. However, we did not find differences in levels of habituation (T = -1.1 p = 0.28) and correlation between PPI and cognition within the sample of healthy older adults.

DISCUSSION: Our results demonstrate that aging is a factor that affects PPI and that it does not seem to predict cognition, however, future studies should explore the potential of using PPI for monitoring cognitive changes associated with techniques such as cognitive training.

Language: en

LA - en SN - 1664-0640 UR - http://dx.doi.org/10.3389/fpsyt.2023.1145783 ID - ref1 ER -