Origin of far-field subcortical evoked potentials to posterior tibial and median nerve stimulation. A comparative study.

Posterior tibial nerve (PTN) evoked potentials (EPs) at the lumbar-low thoracic level have waveforms similar to median nerve (MN) EPs at the cervical level. They consist of a short-duration negativity (N18 and N10, respectively), which reflects the afferent volley before it enters the spinal canal, and a longer-duration, later negativity (N20 and N12, respectively), which consists mainly of slow frequencies and most probably is a postsynaptic dorsal cord potential. At the neck-scalp derivation the MN EP consists of two near-field negativities (N10 and N12) that are recorded from the neck electrode and two far-field positivities (P11 and P13) that are recorded from the scalp electrode. The neck-scalp response to PTN stimulation consists of a near field potential N24 that is followed by a far-field potential P27.

[1]  U. Lindblom,et al.  Localization of the Structure Generating the Negative Cord Dorsum Potential Evoked by Stimulation of Low Threshold Cutaneous Fibres , 1953 .

[2]  T. Yamada,et al.  Central latencies of somatosensory cerebral evoked potentials. , 1978, Archives of neurology.

[3]  M. Dimitrijevic,et al.  Evoked spinal cord and nerve root potentials in humans using a non-invasive recording technique. , 1978, Electroencephalography and clinical neurophysiology.

[4]  C. Bernhard.  The Spinal Cord Potentials in Leads from the Cord Dorsum in Relation to Peripheral Source of Afferent Stimulation , 1953 .

[5]  G. Klem,et al.  Early somatosensory potentials evoked by median nerve stimulation , 1981, Neurology.

[6]  R. Cracco,et al.  Somatosensory evoked potential in man: far field potentials. , 1976, Electroencephalography and clinical neurophysiology.

[7]  R. Cracco,et al.  Cerebral and spinal somatosensory evoked potentials in children with CNS degenerative disease. , 1980, Electroencephalography and clinical neurophysiology.

[8]  R. Cracco,et al.  Somatosensory Evoked Potentials in Man: Cerebral, Subcortical, Spinal, and Peripheral Nerve Potentials , 1979 .

[9]  H. S. Gasser,et al.  POTENTIALS PRODUCED IN THE SPINAL CORD BY STIMULATION OF DORSAL ROOTS , 1933 .

[10]  G Cheron,et al.  Central somatosensory conduction in man: neural generators and interpeak latencies of the far-field components recorded from neck and right or left scalp and earlobes. , 1980, Electroencephalography and clinical neurophysiology.

[11]  J Kimura,et al.  Short latency somatosensory evoked potentials following median nerve stimulation in man. , 1980, Electroencephalography and clinical neurophysiology.

[12]  R. Cracco.  Traveling waves of the human scalp-recorded somatosensory evoked response: effects of differences in recording technique and sleep on somatosensory and somatomotor responses. , 1972, Electroencephalography and clinical neurophysiology.

[13]  E. Sedgwick,et al.  Properties of a spinal somatosensory evoked potential recorded in man. , 1978, Journal of neurology, neurosurgery, and psychiatry.

[14]  B. Cant,et al.  Conduction time in central somatosensory pathways in man. , 1978, Electroencephalography and clinical neurophysiology.

[15]  J. Daube,et al.  Lumbosacral spinal evoked potentials in humans , 1980, Neurology.

[16]  G. Klem,et al.  Origin of far-field subcortical potentials evoked by stimulation of the posterior tibial nerve. , 1981, Electroencephalography and clinical neurophysiology.

[17]  W C Wiederholt,et al.  Short-latency somatosensory evoked potentials. , 1978, Archives of neurology.

[18]  A. McComas,et al.  Analysis of evoked lumbosacral potentials in man. , 1978, Journal of neurology, neurosurgery, and psychiatry.

[19]  S. Jones,et al.  Spinal and sub-cortical evoked potentials following stimulation of the posterior tibial nerve in man. , 1978, Electroencephalography and clinical neurophysiology.

[20]  R. Cracco,et al.  Spinal evoked response: peripheral nerve stimulation in man. , 1973, Electroencephalography and clinical neurophysiology.

[21]  R P Lesser,et al.  Effect of stimulus intensity on short latency somatosensory evoked potentials. , 1979, Electroencephalography and clinical neurophysiology.

[22]  G. Klem,et al.  Paradoxical lateralization of cortical potentials evoked by stimulation of posterior tibial nerve. , 1982, Archives of neurology.

[23]  C. Hesser,et al.  Effect of lung inflation on the pulmonary circulation in anesthetized dogs. , 1953, Acta physiologica Scandinavica.

[24]  C. Erteki̇n.  STUDIES ON THE HUMAN EVOKED ELECTROSPINOGRAM , 1976 .

[25]  R. Cracco,et al.  The spinal evoked response in infants and children , 1975, Neurology.

[26]  S. Jones.  Short latency potentials recorded from the neck and scalp following median nerve stimulation in man. , 1977, Electroencephalography and clinical neurophysiology.

[27]  T. Tsumoto,et al.  Analysis of somatosensory evoked potentials to lateral popliteal nerve stimulation in man. , 1972, Electroencephalography and clinical neurophysiology.