Altered Effective Connectivity of the Primary Motor Cortex in Transient Ischemic Attack
Zeqi Hao1,2, Yulin Song3, Yuyu Shi1,2
1School of Teacher Education, Zhejiang Normal University, Jinhua, China.
Neural Plasticity
|November 28, 2022
Summary
Individuals with transient ischemic attack (TIA) show altered brain connectivity, particularly in motor networks. These changes correlate with cholesterol levels, offering insights into TIA
Area of Science:
- Neuroscience
- Neurology
- Medical Imaging
Background:
- Transient ischemic attack (TIA) is a critical warning sign for stroke.
- Understanding the neural underpinnings of TIA is crucial for early intervention.
- Motor impairments are common in TIA patients, but their neural basis requires further elucidation.
Purpose of the Study:
- To investigate alterations in motor-related effective brain connectivity in individuals following a TIA.
- To explore the relationship between these connectivity changes and clinical characteristics.
Main Methods:
- Recruited 48 TIA patients and 41 healthy controls (HCs).
- Utilized Magnetic Resonance Imaging (MRI) for brain scanning.
- Applied Granger causality analysis (GCA) on bilateral primary motor cortex (M1) and partial correlation for clinical data analysis.
Main Results:
- Individuals with TIA exhibited significant alterations in effective connectivity between M1 and various brain regions involved in motor, visual, auditory, and sensory integration compared to HCs.
- GCA values showed a significant correlation with high- and low-density lipoprotein cholesterol levels in the TIA group.
Conclusions:
- This study reveals abnormal motor-related effective connectivity in TIA patients, indicating disrupted brain information flow.
- Findings contribute to understanding TIA pathophysiology and motor deficits.
- Suggests potential for new diagnostic and therapeutic strategies for TIA.
