Sensory nerve conduction velocity: technical requirements and normal values for branches of the radial and ulnar nerves of the dog.
Conduction velocities of compound action potentials of sensory axons of alteral superficial radial (LSR) and dorsal ulnar nerves (DUN) of the dog were determined by averaging potentials evoked and recorded through subcutaneous needle electrodes. Suitable locations for electrodes were identified and specificities of sites for LSR and DUN were verified by recording before and after cutting the nerves. Stimulus rates of 4/second to 20/second did not markedly affect conduction velocities. Increasing stimulus intensity in steps from threshold to 8 X threshold recruited more axons into the compound action potentials but resulted in interference from movement and muscle potentials at 4 X or 8 X threshold. Mean conduction velocities at 2 X threshold were: LSR = 61.7 +/- 0.76 SEM; DUN = 68.1 +/- 2.71 SEM.
D000200:Action Potentials; D000818:Animals; D001369:Axons / Q000502:physiology; D004285:Dogs / Q000502:physiology*; D004558:Electric Stimulation; D005071:Evoked Potentials; D009431:Neural Conduction; D011826:Radial Nerve / Q000502:physiology*; D011984:Sensory Receptor Cells / Q000502:physiology; D014459:Ulnar Nerve / Q000502:physiology*