Functional Brain Imaging |
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Page 335
To the extent that the dominant current vector for the underlying cortical activity is
perpendicular to the skull surface , this provides for excellent localization of the
activity . However , if the vector orientation is oblique , the location of the field ...
To the extent that the dominant current vector for the underlying cortical activity is
perpendicular to the skull surface , this provides for excellent localization of the
activity . However , if the vector orientation is oblique , the location of the field ...
Page 339
Note the activity at frontal electrodes , a consequence of the reference strategy ,
not the presence of alpha generators in frontal regions . ( From Duffy FH , Iyer VG
, Surwillo WW : Clinical electroencephalography and topographic brain mapping
...
Note the activity at frontal electrodes , a consequence of the reference strategy ,
not the presence of alpha generators in frontal regions . ( From Duffy FH , Iyer VG
, Surwillo WW : Clinical electroencephalography and topographic brain mapping
...
Page 340
8-21 ) , often referred to as slow wave sleep , are dominated by theta and delta
activities . In stage III , large - amplitude ( 100+ u V ) delta activity makes up more
than 20 % of the record . Irregular and semirhythmic theta activity is also ...
8-21 ) , often referred to as slow wave sleep , are dominated by theta and delta
activities . In stage III , large - amplitude ( 100+ u V ) delta activity makes up more
than 20 % of the record . Irregular and semirhythmic theta activity is also ...
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Contents
Introduction to Brain Imaging | 1 |
Computerized Axial Tomography | 97 |
Magnetic Resonance Imaging | 145 |
Copyright | |
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Other editions - View all
Functional Brain Imaging William W. Orrison,Jeffrey Lewine,John Sanders,Michael F. Hartshorne Limited preview - 2017 |
Common terms and phrases
abnormal activity additional agents allow appearance applications arterial associated blood flow brain cause cells central cerebral changes clinical complex components computed concentration considered contrast cortex cortical decreased demonstrating depends detection diffusion direction disease echo effects emission et al evoked FMRI frequency functional glucose gradient human imaging important increased indicator injection intensity lateral less levels limited localization Magn Reson magnetic field mapping matter measured membrane methods motor nerve neurons normal Nucl nuclei object observed obtained occur oxygen particular patients pattern peak perfusion phase potential primary processing produce projections pulse recorded regions relative relaxation resolution response scan sensitivity sequences shift signal significant space spatial SPECT stimulation strength structure studies techniques temporal tion tissue tomography tumors typically visual volume York