Fig. 5.

Location of recorded neurons in the spinal cord and afferent modalities of the neurons receiving inputs from the ankle. A: schematic drawing of the spinal cord showing the locations of 10 recorded neurons. Each location was marked with an injection of methylene blue after the recording session, and the marked spot was recovered by histological procedures. Marked spots are clustered in the medial deep laminae of the dorsal horn, and neurons having different afferent modalities were mixed within the same region. B and C: pie charts showing the proportion of recorded dorsal horn neurons that respond to PF, Iv, or Cp stimuli in normal rats (n = 40; B) and ankle-sprained rats (n = 64; C). The proportion of afferent modalities was about the same in normal and ankle-sprained rats. Multi, multiresponsive neurons.