Hippocampus in relation to mental sweating response evoked by memory recall and mental calculation: a human electroencephalography study with dipole tracing

Mental-sweating response (MSR) was observed in the palm when the subject was asked to perform a mentally stressful task such as memory recall or mental calculation. About 4 s before the development of MSR, small MSR-related wavelets (MSR wavelets) and large waves were randomly generated on electroencephalograph. After differentiating the two types of waves, we calculated locations of the current dipole of MSR wavelets using the two-dipole model of the SSB/dipole tracing method. The result showed that one current dipole of MSR wavelets was consistently located in the hippocampus while the other dipole was widely dispersed in the cortex during memory recall and mental calculation.

[1]  S. Dehaene,et al.  Abstract representations of numbers in the animal and human brain , 1998, Trends in Neurosciences.

[2]  L. Squire,et al.  The medial temporal lobe memory system , 1991, Science.

[3]  Klinische Neuroanatomie und kranielle Bilddiagnostik : Computertomographie und Magnetresonanztomographie , 1991 .

[4]  M. D’Esposito,et al.  Environmental Knowledge Is Subserved by Separable Dorsal/Ventral Neural Areas , 1997, The Journal of Neuroscience.

[5]  Ben Goertzel,et al.  Long-Term Memory , 1993 .

[6]  P. Bucy.  The Precentral Motor Cortex , 1946 .

[7]  Richard S. J. Frackowiak,et al.  Recalling Routes around London: Activation of the Right Hippocampus in Taxi Drivers , 1997, The Journal of Neuroscience.

[8]  K. Hagbarth,et al.  Conductivity ratios of the scalp-skull-brain head model in estimating equivalent dipole sources in human brain , 1995, Neuroscience Research.

[9]  J F Fulton,et al.  Physiology of the Nervous System , 1939, Science.

[10]  Yoshio Nakajima,et al.  Intracerebral source localization of mental process-related potentials elicited prior to mental sweating response in humans , 1998, Neuroscience Letters.

[11]  R. Adolphs,et al.  Double dissociation of conditioning and declarative knowledge relative to the amygdala and hippocampus in humans , 1995, Science.

[12]  W. Kühnel.  Klinische Neuroanatomie und kranielle Bilddiagnostik. Computertomographie und Magnetresonanztomographie. Von H.-J. Kretschmann und W. Weinrich. 2., neubearbeitete und erweiterte Auflage. Zeichnungen von Ingeborg Heike und Rudolf Mutschall, 596 meist mehrfarbige Einzelabbildungen. Georg Thieme Verlag , 1992 .

[13]  A. Berthoz,et al.  Mental navigation along memorized routes activates the hippocampus, precuneus, and insula , 1997, Neuroreport.

[14]  T. Musha,et al.  Forward and inverse problems of EEG dipole localization. , 1999, Critical reviews in biomedical engineering.

[15]  L. Squire.  CHAPTER 7 – Memory and the Brain* , 1986 .

[16]  U Moström,et al.  Location of electric current sources in the human brain estimated by the dipole tracing method of the scalp-skull-brain (SSB) head model. , 1994, Electroencephalography and clinical neurophysiology.

[17]  Richard S. J. Frackowiak,et al.  Learning to find your way: a role for the human hippocampal formation , 1996, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[18]  M. D’Esposito,et al.  The Parahippocampus Subserves Topographical Learning in Man , 1996 .

[19]  E. Tulving,et al.  Hippocampal PET activations of memory encoding and retrieval: The HIPER model , 1998, Hippocampus.