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The persistence of somatosensory and auditory pathway evoked potentials in severe hypoglycemia in the cat

, : The persistence of somatosensory and auditory pathway evoked potentials in severe hypoglycemia in the cat. Electroencephalography and Clinical Neurophysiology 61(2): 161-164

In a previous study it was shown that during severe insulin-induced hypoglycemia in rats and cats (0.38 mmol/l, i.e., 6.8 mg% and 0.8 mmol/l, i.e., 14 mg% respectively) with isoelectric EEG, the latency and amplitude of the auditory nerve-brain-stem evoked responses were not affected. In the present study on cats, the above evoked responses were complemented by recording in addition the cortical auditory evoked potential and the peripheral, brain-stem and cortical components of the somatosensory evoked potentials. Each of these evoked potentials remained in the presence of 0.75 mmol/l glucose in plasma. The persistence of the somatosensory cortical evoked potential was unexpected since two other groups have reported the disappearance of this potential during hypoglycemia. The types of neuronal activity which can still be recorded in severe hypoglycemia are probably generated by neuronal structures with lower metabolic demands such as axons and oligosynaptic pathways, surviving on the consumption of endogenous substrates with compensatory elevation of local cerebral blood flow.


PMID: 2410227

DOI: 10.1016/0013-4694(85)91056-9

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