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. 2001 Dec 1;537(Pt 2):489–495. doi: 10.1111/j.1469-7793.2001.00489.x

Figure 1. Identification of STT lamina I Warm neurones.

Figure 1

A, one-for-one following of a train of 6 antidromic pulses (•, 60 μA, 2 ms, 250 Hz) delivered from the electrode in the contralateral basal part of the ventromedial nucleus (vVMb). Conduction distance, 330 mm. B, collision of the first impulse in a train of 3 antidromic action potentials (150 Hz) due to an orthodromic impulse (*) occurring within the critical interval. The arrow indicates the point at which the first antidromic impulse would have occurred. C, a pair of responses from the same unit during electrical stimulation of the receptive field showing time-locked (monosynaptic) responses at C-fibre latency. The stimuli were applied at the beginning of each trace. Conduction distance, 360 mm. D, location of the recording site in lamina I of the spinal cord. E, contralateral thalamus showing effective sites for antidromic activation. CL, central lateral n.; H, habenula; LG, lateral geniculate n.; LP, lateral posterior n.; MD, medial dorsal n.; PV, paraventricular n.; R, reticular n.; Sm, submedial n.; VPL, ventral posterior lateral n.; VPM, ventral posterior medial n.; ZI, zona incerta.