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GFRα1-IR in the sacral parasympathetic nucleus (SPN) viewed in horizontal spinal cord sections after pelvic nerve injury. (A–C): Asymmetric upregulation of GFRα1-IR in the SPN ipsilateral to a unilateral pelvic nerve transection. (D,E) Symmetric upregulation of GFRα1-IR in the SPN on both sides after bilateral pelvic nerve injury. (F,G) Examples of GFRα1-IR somata in SPN ipsilateral to pelvic nerve transection. Scale bars represent 200 μm (A), 50 μm (B–E), and 50 μm (F,G).
