Detecting impaired language processing in patients with mild cognitive impairment using around-the-ear cEEgrid...

Area of Science:

• Neuroscience
• Cognitive Science
• Clinical Neurology

Background:

• Mild cognitive impairment (MCI) involves cognitive decline but preserved daily functioning, often impacting memory.
• Language comprehension deficits in MCI are not well understood, despite potential impacts on communication.
• Early detection of MCI-related impairments is crucial for timely intervention and management.

Purpose of the Study:

• To investigate language comprehension impairments in individuals with MCI using electrophysiological measures.
• To identify specific neural signatures associated with single-word retrieval and multi-word phrase binding in MCI.
• To evaluate the utility of around-the-ear electrodes (cEEGrids) for detecting these impairments.

Main Methods:

• Compared electrophysiological brain activity using cEEGrids in 23 MCI patients and 23 age-matched controls.
• Assessed language comprehension via a two-word phrase paradigm, analyzing oscillatory changes during word processing.
• Examined neural signatures for lexico-semantic single-word retrieval and multi-word binding.

Main Results:

• Significant differences in electrophysiological signatures were found between MCI patients and controls.
• Controls exhibited distinct alpha/beta band activity for lexical retrieval and multi-word binding.
• MCI patients lacked these characteristic neural signatures for both single-word retrieval and phrase binding.

Conclusions:

• Individuals with MCI demonstrate impaired electrophysiological signatures during language comprehension tasks.
• cEEGrid technology offers a noninvasive and sensitive method for detecting early language processing deficits in MCI.
• Findings highlight the potential of neurophysiological markers for early MCI diagnosis and monitoring.