[Ischemic white matter lesions may be caused by the baroreceptor reflex are dysfunction]

Area of Science:

• Neuroscience
• Cardiovascular Physiology
• Autonomic Nervous System Research

Context:

• Cerebral infarction, characterized by ischemic white matter lesions (WMLs), affects cardiovascular regulation.
• Hypertension is common in individuals with cerebral infarction.
• Autonomic nervous system function, specifically muscle sympathetic nerve activity (MSNA), is crucial for blood pressure control.

Purpose:

• To investigate sex-specific differences in autonomic nervous system function in individuals with cerebral infarction.
• To explore the relationship between WMLs, baroreceptor reflex sensitivity, and MSNA.
• To compare autonomic responses to physiological stressors between control and cerebral infarction groups.

Summary:

• Muscle sympathetic nerve activity (MSNA) was measured in control and cerebral infarction groups. Infarcted males displayed baroreceptor reflex insensitivity, while infarcted females showed reduced MSNA at rest and impaired baroreceptor function and vascular reactivity during testing.
• White matter lesion (WML) burden was significantly higher in infarcted females than males.
• These findings suggest distinct pathophysiological mechanisms underlying autonomic dysfunction in male and female stroke survivors.

Impact:

• Highlights sex-specific autonomic dysregulation following cerebral infarction.
• Suggests potential therapeutic targets related to baroreceptor function and vascular reactivity.
• Provides insights into the role of WMLs in autonomic dysfunction and their differential impact based on sex.