Postural visual dependence in asymptomatic type 2 diabetic patients without peripheral neuropathy during a postural...

Area of Science:

• Neuroscience
• Endocrinology
• Biomechanics

Background:

• Diabetes mellitus is increasingly linked to impaired vestibular function.
• Postural control deficits in diabetes are exacerbated under challenging conditions.
• Visual control of posture is crucial for maintaining balance.

Purpose of the Study:

• To compare visual control of posture in healthy individuals and those with type 2 diabetes.
• To investigate postural stability during a challenging task in diabetic and non-diabetic subjects.
• To assess the impact of visual input on postural control in type 2 diabetes.

Main Methods:

• Forty-eight asymptomatic type 2 diabetes patients and 29 healthy controls participated.
• Postural stability was assessed using computerized posturography on a foam block.
• Sway parameters and Romberg ratios were measured and compared between groups.

Main Results:

• Diabetic subjects showed larger sway parameters with vision available.
• With eyes closed, diabetics had larger sway area but smaller Romberg ratios.
• Anteroposterior-mediolateral (AP-ML) coupling was tightest in diabetics during eye closure.

Conclusions:

• Diabetics display masked postural visual dependence due to subclinical vestibular deficits.
• Increased fall risk on unstable surfaces, particularly in poor lighting, is suggested for diabetics.
• Diabetics may need to adopt compensatory strategies like stiffening to maintain balance.