ACTIVATION SEQUENCE OF DISCRETE BRAIN-AREAS DURING COGNITIVE-PROCESSES - RESULTS FROM MAGNETIC-FIELD TOMOGRAPHY

被引:21
作者
IOANNIDES, AA
FENWICK, PBC
LUMSDEN, J
LIU, MJ
BAMIDIS, PD
SQUIRES, KC
LAWSON, D
FENTON, GW
机构
[1] INST PSYCHIAT,LONDON SE5 8AF,ENGLAND
[2] BROADMOOR HOSP,DEPT NEUROPHYSIOL,CROWTHORNE RG11 7EG,BERKS,ENGLAND
[3] BIOMAGNET TECHNOL INC,SAN DIEGO,CA 92121
[4] UNIV DUNDEE,DEPT PSYCHIAT,DUNDEE DD1 9SY,SCOTLAND
来源
ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY | 1994年 / 91卷 / 05期
关键词
CONTINGENT MAGNETIC VARIATION; EVOKED POTENTIAL; MEG; MAGNETIC FIELD TOMOGRAPHY; MOTOR CORTEX; SUPPLEMENTARY MOTOR AREA; MEDIAL PARIETAL AREA; TIME COURSE OF CORTICAL ACTIVATION;
D O I
10.1016/0013-4694(94)90125-2
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Magnetic field tomography is a technique for extracting 3-dimensional estimates of current density in the brain, from non-contact, non-invasive measurements of the magnetic field generated by the brain. It allows visualisation of both cortical and subcortical focal activation patterns at millisecond intervals, and the relative time difference between active cortical areas. We have used this technique to study the activation history of discrete brain regions associated with the preparation for, initiation and inhibition of movement, and movement itself in a CNV paradigm. The strongest focal activities are found within well defined cortical regions, namely the auditory (A1), sensorimotor (SMI), medial parietal area (MPA) and anterior supplementary motor area (SMA). For the movement condition, activation history differs for the warning stimulus and the stimulus initiating movement.
引用
收藏
页码:399 / 402
页数:4
相关论文
共 6 条
[1]  
BROWN D, 1988, INT J PSYCHOPHYSIOL, V7, P35
[2]  
Fenwick P. B. C., 1993, Brain Topography, V5, P275, DOI 10.1007/BF01128994
[3]   VISUAL-STABILITY DURING EYEBLINKS [J].
HARI, R ;
SALMELIN, R ;
TISSARI, SO ;
KAJOLA, M ;
VIRSU, V .
NATURE, 1994, 367 (6459) :121-122
[4]   COMPARISON OF MAGNETOENCEPHALOGRAPHY WITH OTHER FUNCTIONAL IMAGING TECHNIQUES [J].
IOANNIDES, AA .
CLINICAL PHYSICS AND PHYSIOLOGICAL MEASUREMENT, 1991, 12 :23-28
[5]   MAGNETIC-FIELD TOMOGRAPHY OF COHERENT THALAMOCORTICAL 40-HZ OSCILLATIONS IN HUMANS [J].
RIBARY, U ;
IOANNIDES, AA ;
SINGH, KD ;
HASSON, R ;
BOLTON, JPR ;
LADO, F ;
MOGILNER, A ;
LLINAS, R .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1991, 88 (24) :11037-11041
[6]   CONTINGENT NEGATIVE VARIATION - ELECTRIC SIGN OF SENSORIMOTOR ASSOCIATION + EXPECTANCY IN HUMAN BRAIN [J].
WALTER, WG ;
WINTER, AL ;
COOPER, R ;
MCCALLUM, WC ;
ALDRIDGE, VJ .
NATURE, 1964, 203 (494) :380-&