Vestibulo-ocular, optokinetic and postural function in diabetes mellitus

Area of Science:

• Neuroscience
• Endocrinology
• Ophthalmology

Background:

• Diabetes mellitus is a systemic disease with potential neurological complications.
• Vestibular and visual systems are crucial for balance and spatial orientation.
• Previous research suggests diabetes can affect neurological functions, but specific impacts on oculomotor and postural control require further investigation.

Purpose of the Study:

• To compare vestibulo-ocular reflex (VOR), optokinetic reflex (OKR), and postural function in individuals with insulin-dependent diabetes mellitus (IDDM) and non-insulin-dependent diabetes mellitus (NIDDM) against non-diabetic controls.
• To identify specific deficits in visual-vestibular and postural control associated with different types of diabetes mellitus.

Main Methods:

• Comparative analysis of VOR, OKR, and postural sway using standardized clinical tests.
• Inclusion of subjects with IDDM, NIDDM, and a healthy control group.
• Assessment of gaze-holding, VOR phase and gain, OKR slow and quick phases, and postural stability under various conditions.

Main Results:

• Both IDDM and NIDDM groups showed significant deficits in gaze-holding in darkness (p < 0.05).
• Diabetic subjects exhibited altered VOR phase (p < 0.005) and reduced OKR slow phase velocity (p < 0.001) and quick phase amplitude (p < 0.02).
• Increased postural sway was observed in both diabetic groups (p < 0.05), though not specific to vestibular-dependent conditions.

Conclusions:

• Both IDDM and NIDDM are associated with significant deficits in gaze-holding, VOR, and OKR functions.
• These findings highlight the impact of diabetes on the neuro-visual-vestibular system.
• Diabetes-related oculomotor and postural impairments may contribute to an increased risk of falls and balance issues.