A new scientific review published in Biological Psychology suggests that age-related impairments in tactile perception may predict cognitive challenges and even the progression toward dementia. The study highlights the potential role of touch-related sensory decline as an early warning sign for cognitive deterioration.
Researchers analyzed previous studies on tactile deterioration across the aging brain, including human studies and animal models, to explore whether this decline could provide an early and accessible signal of future cognitive problems. They found that changes in the brain’s sensory processing areas, particularly the hippocampus, are tightly linked to declining touch perception and memory, attention, and executive functioning.
The review outlines how tactile input helps the hippocampus integrate information and support cognitive flexibility and decision-making. When this input is diminished due to aging or sensory deprivation, hippocampal function may suffer, leading to poorer cognitive outcomes. The study also highlights proprioception — the sense of body position and movement — and stereognosis — the ability to recognize objects through touch — as key components of the tactile system affected by aging.
The researchers propose that tactile deterioration may be more than just a sign of aging – it could be an early marker of cognitive risk. They suggest that touch-based assessments could become a valuable tool in detecting people who may benefit from early intervention. The review also encourages further research into how different sensory systems interact and contribute to overall cognitive health.
The findings have significant implications for the prevention and detection of dementia, particularly as global populations continue to live longer and experience more mild cognitive impairment. By exploring the link between tactile decline and cognitive deterioration, researchers aim to identify potential early markers and develop targeted interventions to protect or restore cognitive function.
Source: https://www.psypost.org/dementia-tactile-decline-may-signal-early-cognitive-impairment