Abstract

1. 1.|During electrical stimulation of a cutaneous nerve evoked potential were recorded from the spinal-cord surface. 2. 2.|The evoked potentials, due to stimulation of different afferent fibre groups, were separated and studied with regard to an effect of moderate spinal cooling (about 5°C). 3. 3.|Cooling always produced an increase in amplitude and duration of the evoked pre- and postsynaptic potentials due to stimulation of large myelinated fibres. The postsynaptic potentials due to smaller myelinated and unmyelinated fibres were less cold sensitive or even warm sensitive. Althogetheer the effect was small. 4. 4.|The importance of these findings for the thermosensitivity of the spinal cord with regard to thermoregulation is discussed.

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