Neurons, Efferent/metabolism; Receptor, Angiotensin, Type 1/metabolism; Spinal Cord/metabolism; Sympathetic Nervous System/metabolism; Wallerian Degeneration/metabolism; Acetylcholine/metabolism; Acetylcholinesterase/immunology; Acetylcholinesterase/metabolism; Adrenergic Fibers/drug effects; Adrenergic Fibers/immunology; Adrenergic Fibers/pathology; Angiotensin II Type 1 Receptor Blockers/pharmacology; Animals; Benzimidazoles/pharmacology; Binding, Competitive/drug effects; Binding, Competitive/physiology; Biphenyl Compounds; Cholinesterase Inhibitors/pharmacology; Disease Models, Animal; Male; Nerve Degeneration/chemically induced; Nerve Degeneration/metabolism; Nerve Degeneration/physiopathology; Neurons, Efferent/immunology; Neurons, Efferent/pathology; Radioligand Assay; Rats; Rats, Sprague-Dawley; Receptor, Angiotensin, Type 1/drug effects; Spinal Cord/immunology; Spinal Cord/physiopathology; Sympathetic Nervous System/immunology; Sympathetic Nervous System/physiopathology; Tetrazoles/pharmacology; Wallerian Degeneration/chemically induced; Wallerian Degeneration/physiopathology