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3.
Australas Radiol ; 44(4): 478-82, 2000 Nov.
Article in English | MEDLINE | ID: mdl-11103554

ABSTRACT

A case of retroperitoneal paraganglioma metastasizing to bone is presented. This is followed by a literature review of treatment options, including external beam radiotherapy, chemotherapy and 131I-metaiodobenzylguanidine.


Subject(s)
Paraganglioma/therapy , Retroperitoneal Neoplasms/therapy , Aged , Combined Modality Therapy , Diagnosis, Differential , Female , Humans , Magnetic Resonance Imaging , Paraganglioma/diagnosis , Retroperitoneal Neoplasms/diagnosis
4.
Neuroreport ; 11(13): 3011-5, 2000 Sep 11.
Article in English | MEDLINE | ID: mdl-11006985

ABSTRACT

In fMRI studies, the averaging of neural activity across multiple trials might obscure important psychophysiological subprocesses. The orienting response (OR) is a distinctive subprocess signalling the active orientation of attention towards potentially significant events. We sought to elucidate fMRI activity associated with visual stimuli that did or did not evoke simultaneously recorded electrodermal ORs (using customised skin conductance recording). 'With-OR' stimuli were associated with significant activity in the hippocampus, anterior cingulate and ventromedial prefrontal cortex. Averaged analysis revealed activity only in the expected visual circuits. Our results suggest that potentially significant stimuli (with-OR) activate different functional networks to familiar (without-OR) stimuli, and that orienting may therefore be an informative subprocess to consider in cognitive fMRI studies.


Subject(s)
Attention/physiology , Brain/physiology , Galvanic Skin Response/physiology , Orientation/physiology , Brain/anatomy & histology , Brain Mapping , Gyrus Cinguli/anatomy & histology , Gyrus Cinguli/physiology , Hippocampus/anatomy & histology , Hippocampus/physiology , Magnetic Resonance Imaging/statistics & numerical data , Nerve Net/anatomy & histology , Nerve Net/physiology , Pattern Recognition, Visual/physiology , Photic Stimulation , Prefrontal Cortex/anatomy & histology , Prefrontal Cortex/physiology , Visual Cortex/anatomy & histology , Visual Cortex/physiology , Visual Pathways/anatomy & histology , Visual Pathways/physiology
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