Thyroid hormone and mood modulation: New insights from functional brain imaging techniques

2003 ◽  
Vol 5 (3) ◽  
pp. 163-165 ◽  
Author(s):  
Michael Bauer ◽  
Peter C. Whybrow
2012 ◽  
Vol 35 (5-6) ◽  
pp. 317-337 ◽  
Author(s):  
Yasaman Ardeshirpour ◽  
Amir H. Gandjbakhche ◽  
Laleh Najafizadeh

In vivooptical imaging is being conducted in a variety of medical applications, including optical breast cancer imaging, functional brain imaging, endoscopy, exercise medicine, and monitoring the photodynamic therapy and progress of neoadjuvant chemotherapy. In the past three decades,in vivodiffuse optical breast cancer imaging has shown promising results in cancer detection, and monitoring the progress of neoadjuvant chemotherapy. The use of near infrared spectroscopy for functional brain imaging has been growing rapidly. In fluorescence imaging, the difference between autofluorescence of cancer lesions compared to normal tissues were used in endoscopy to distinguish malignant lesions from normal tissue or inflammation and in determining the boarders of cancer lesions in surgery. Recent advances in drugs targeting specific tumor receptors, such as AntiBodies (MAB), has created a new demand for developing non-invasivein vivoimaging techniques for detection of cancer biomarkers, and for monitoring their down regulations during therapy. Targeted treatments, combined with new imaging techniques, are expected to potentially result in new imaging and treatment paradigms in cancer therapy. Similar approaches can potentially be applied for the characterization of other disease-related biomarkers. In this chapter, we provide a review of diffuse optical and fluorescence imaging techniques with their application in functional brain imaging and cancer diagnosis.


2001 ◽  
Vol 24 (3) ◽  
pp. 189-203 ◽  
Author(s):  
Todd L. Richards

This tutorial/review covers functional brain-imaging methods and results used to study language and reading disabilities. Although the main focus is on functional MRI and functional MR spectroscopy, other imaging techniques are discussed briefly such as positron emission tomography (PET), electroencephalography (EEG), magnetoencepholography (MEG), and MR diffusion imaging. These functional brain-imaging studies have demonstrated that dyslexia is a brain-based disorder and that serial imaging studies can be used to study the effect of treatment on functional brain activity.


2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Takamasa Ando ◽  
Tatsuya Nakamura ◽  
Toshiya Fujii ◽  
Teruhiro Shiono ◽  
Tasuku Nakamura ◽  
...  

AbstractA revolution in functional brain imaging techniques is in progress in the field of neurosciences. Optical imaging techniques, such as high-density diffuse optical tomography (HD-DOT), in which source-detector pairs of probes are placed on subjects’ heads, provide better portability than conventional functional magnetic resonance imaging (fMRI) equipment. However, these techniques remain costly and can only acquire images at up to a few measurements per square centimetre, even when multiple detector probes are employed. In this study, we demonstrate functional brain imaging using a compact and affordable setup that employs nanosecond-order pulsed ordinary laser diodes and a time-extracted image sensor with superimposition capture of scattered components. Our technique can simply and easily attain a high density of measurement points without requiring probes to be attached, and can directly capture two-dimensional functional brain images. We have demonstrated brain activity imaging using a phantom that mimics the optical properties of an adult human head, and with a human subject, have measured cognitive brain activation while the subject is solving simple arithmetical tasks.


2010 ◽  
Vol 1 (1) ◽  
pp. 43-49 ◽  
Author(s):  
Berit Björkman ◽  
Staffan Arnér ◽  
Iréne Lund ◽  
Lars-Christer Hydén

AbstractBackgroundPhantom phenomena – pain or other sensations appearing to come from amputated body parts – are frequent consequences of amputation and can cause considerable suffering. Also, stump pain, located in the residual limb, is in the literature often related to the phantom phenomena. The condition is not specific to amputated limbs and has, to a lesser extent, been reported to be present after radical surgery in other body parts such as breast, rectum and teeth.Multi-causal theories are used when trying to understand these phenomena, which are recognized as the result of complex interaction among various parts of the central nervous system confirmed in studies using functional brain imaging techniques.Functional brain imaging has yielded important results, but without certainty being related to phantom pain as a subjective clinical experience.There is a wide range of treatment methods for the condition but no documented treatment of choice.AimsIn this study a qualitative, explorative and prospective design was selected, in the aim to understand the patients’ personal experience of phantom phenomena.The research questions focused at how patients affected by phantom pain and or phantom sensations describe, understand, and live with these phenomena in their daily life.This study expanded ‘phantom phenomena’ to also encompass phantom breast phenomenon. Since the latter phenomenon is not as well investigated as the phantom limb, there is clinical concern that this is an underestimated problem for women who have had breasts removed.MethodsThe present study forms the first part of a larger, longitudinal study. Only results associated with data from the first interviews with patients, one month after an amputation, are presented here. At this occasion, 28 patients who had undergone limb amputation (20) or mastectomy (8) were interviewed. The focused, semi-structured interviews were recorded, transcribed, and then analyzed using discourse-narrative analysis.ResultsThe interviewees had no conceptual problems in talking about the phenomena or distinguishing between various types of discomfort and discomfort episodes. Their experience originated from a vivid, functioning body that had lost one of its parts. Further, the interviewees reported the importance of rehabilitation and advances in prosthetic technology. Loss of mobility struck older amputees as loss of social functioning, which distressed them more than it did younger amputees. Phantom sensations, kinetic and kinesthetic perceptions, constituted a greater problem than phantom pain experienced from the amputated body parts. The descriptions by patients who had had mastectomies differed from those by patients who had lost limbs in that the phantom breast could be difficult to describe and position spatially.The clinical implication of this study is that when phantom phenomena are described as everyday experience, they become a psychosocial reality that supplements the definition of phantom phenomena in scientific literature and clinical documentation.ConclusionsThere is a need for clinical dialogues with patients, which besides, providing necessary information about the phenomena to the patients creates possibilities for health professionals to carefully listen to the patients’ own descriptions of which functional losses or life changes patients fear the most. There is a need for more qualitative studies in order to capture the extreme complexity of the pain–control system will be highlighted.


1993 ◽  
Vol 11 (4) ◽  
pp. 451-459 ◽  
Author(s):  
R.T. Constable ◽  
G. McCarthy ◽  
T. Allison ◽  
A.W. Anderson ◽  
J.C. Gore

1997 ◽  
Vol 25 (s1) ◽  
pp. S57-S63 ◽  
Author(s):  
Brian A. Fallon ◽  
Sam Das ◽  
Jeffrey J. Plutchok ◽  
Felice Tager ◽  
Kenneth Liegner ◽  
...  

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