Reflex maturation.
D000818:Animals; D000831:Animals, Newborn; D002415:Cats; D009046:Motor Neurons / Q000502:physiology; D009470:Muscle Spindles / Q000502:physiology; D009132:Muscles / Q000502:physiology; D009186:Myelin Sheath / Q000254:growth & development; D012018:Reflex; D012023:Reflex, Monosynaptic; D011984:Sensory Receptor Cells / Q000502:physiology; D013116:Spinal Cord / Q000254:growth & development* / Q000502:physiology; D013126:Spinal Nerve Roots / Q000166:cytology