behavior/neurological
• mutants respond significantly only to the coarsest grid in a test for responses to a grating cue in the dark, whereas controls show a significant response to all grids tested
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• after chronic constriction injury (CCI) of the sciatic nerve, mutants do not show any hyperalgesia (threshold decreases to ~1 gram) until the third day after injury, compared to wild-type mice which developed allodynia within a few days, with mechanical thresholds decreasing from 3 grams to less than 0.25 grams
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nervous system
• mutants show an increase in mechanically insensitive A fibers (Abeta and Agamma) compared to wild-type
• percentage of insensitive C fibers is not significantly changed
• abount 36% of isolated sensory neurons from mutant mice show no current response to mechanical stimulation of the neurites; proportion of cells displaying slowly or rapidly adapting mechanically elevated currents is slightly reduced compared to wild-type
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