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Related Experiment Video

Updated: Jul 3, 2026

Studying the Hypothalamic Insulin Signal to Peripheral Glucose Intolerance with a Continuous Drug Infusion System into the Mouse Brain

Studying the Hypothalamic Insulin Signal to Peripheral Glucose Intolerance with a Continuous Drug Infusion System into the Mouse Brain

Published on: January 4, 2018

High insulin levels are positively associated with peripheral nervous system function.

H Isojärvi¹, M Kallio, R Korpelainen

¹Department of Medical Technology, Institute of Biomedicine, University of Oulu, Oulu, Finland. henriiso@paju.oulu.fi

Acta Neurologica Scandinavica

|July 22, 2008

Summary

Higher insulin levels in overweight individuals are linked to better peripheral nervous system (PNS) function. This suggests that elevated insulin, even without high glucose, may benefit nerve health.

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Area of Science:

Neurology
Endocrinology
Metabolic Health

Background:

Overweight and obesity are associated with metabolic dysfunction.
Peripheral nervous system (PNS) function can be impacted by metabolic changes.

Purpose of the Study:

To investigate the relationship between peripheral nervous system function and metabolic markers in overweight individuals.
To analyze nerve conduction parameters in relation to insulin and glucose levels.

Main Methods:

Forty-four non-diabetic overweight adults underwent assessment of peroneal motor and radial, sural, and medial plantar sensory nerve conduction.
Insulin and glucose levels were measured via oral glucose tolerance test (OGTT) over 2-3 years.
Multiple stepwise linear regression models, adjusted for covariates, were employed for data analysis.

Main Results:

Baseline insulin levels at 120 minutes post-OGTT significantly explained variations in peroneal F-wave latencies.
Insulin levels accounted for 15% of variation in sural sensory latency and 13% in sural nerve conduction velocity (NCV).
A 10% variation in medial plantar sensory NCV was also explained by these insulin levels.

Conclusions:

Serum insulin levels at 120 minutes post-OGTT show a positive association with peripheral nervous system function.
Elevated insulin levels, independent of significantly high glucose levels, appear to be beneficial for PNS function in overweight individuals.