Topography of the human motor potential.

Abstract The motor potential (MP) accompanying voluntary movements is maximal over Rolandic cortex and shows a somatotopic distribution for contractions of various muscles similar to that obtained by cortical stimulation. The MP field distribution was shown to be compatible with its generation by a source of comparable size to the excitable motor cortex. The late component of the somato-sensory evoked response (SER) elicited by peripheral nerve stimulation had a similar distribution, but extended slightly posterior to that of the MP. These differences in distribution between the SER and the P2 component of the MP, presumed to represent afferent input from joint and muscle receptors, are attributed to the predominantly post-central projection of the cutaneous afferents which are also activated by electrical stimulation of peripheral nerve.

[1]  T. Allison,et al.  Distribution of cerebral somatosensory evoked responses in normal man , 1962 .

[2]  J. Scarff.  PRIMARY CORTICAL CENTERS FOR MOVEMENTS OF UPPER AND LOWER LIMBS IN MAN: OBSERVATIONS BASED ON ELECTRICAL STIMULATION , 1940 .

[3]  L. Gilden,et al.  Summated human EEG potentials with voluntary movement. , 1966, Electroencephalography and clinical neurophysiology.

[4]  P. Bard,et al.  Distribution of cortical potentials evoked by electrical stimulation of dorsal roots in Macaca mulatta. , 1947, Federation proceedings.

[5]  J C SHAW,et al.  Potential distribution analysis. II. A theoretical consideration of its significance in terms of electrical field theory. , 1955, Electroencephalography and clinical neurophysiology.

[6]  P. Gloor.  Electrophysiological studies on the connections of the amygdaloid nucleus in the cat. II. The electrophysiological properties of the amygdaloid projection system. , 1955, Electroencephalography and clinical neurophysiology.

[7]  R.N.Dej.,et al.  The Cerebral Cortex of Man , 1951, Neurology.

[8]  A Kamp,et al.  Contingent negative variation and evoked responses recorded by radio-telemetry in free-ranging subjects. , 1967, Electroencephalography and clinical neurophysiology.

[9]  J. Bates.  Cranio-cerebral topometry in man: A. Delmas and B. Pertuiset Charles C. Thomas, Springfield (Ill.), 1959, 436 pp., $ 38.50 , 1961 .

[10]  M. Low,et al.  Surface‐negative, slow‐potential shift associated with conditioning in man , 1966, Neurology.

[11]  W. Walter,et al.  Contingent Negative Variation : An Electric Sign of Sensori-Motor Association and Expectancy in the Human Brain , 1964, Nature.

[12]  J. Shaw,et al.  Potential distribution analysis. I. A new technique for the analysis of electrophysiological phenomena. , 1955, Electroencephalography and clinical neurophysiology.

[13]  W. Penfield,et al.  SOMATIC MOTOR AND SENSORY REPRESENTATION IN THE CEREBRAL CORTEX OF MAN AS STUDIED BY ELECTRICAL STIMULATION , 1937 .

[14]  E. Evarts.  Pyramidal tract activity associated with a conditioned hand movement in the monkey. , 1966, Journal of neurophysiology.

[15]  R. Vaughan,et al.  Surgery of the Brain and Spinal Cord , 1903, The Hospital.