Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 37 for “"OFC"”.
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Orbitofrontal Cortex and Social Processing in Rodent Models
… network activity in the orbitofrontal cortex (OFC) and was associated with accumulation of neurotoxin marker, acrolein, in lateral prefrontal cortex (PFC) (including OFC), indicating OFC as a brain region of interest that may contribute to social processing. Measuring GABA and Glutamate-related …
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Orbitofrontal Cortex Repetitive Transcranial Magnetic Stimulation for the Treatment of Major Depressive Disorder
… that the right lateral orbitofrontal cortex (OFC) plays a key role in ‘non-reward’ functions and shows hyperconnectivity in MDD. An initial case study by our group demonstrated that inhibitory OFC-rTMS was able to achieve remission in an MDD case nonresponsive to DLPFC- and DMPFC-rTMS. The aim …
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Vergleichende MR- volumetrische Untersuchung des orbitofrontalen Kortex bei Schizophrenie, bipolarer Störung, Zwangserkrankung und gesunden Kontrollpersonen
… beschrieben worden. Der orbitofrontale Kortex (OFC) als Teil des PFC ist über den vorderen Schenkel der Capsula interna mit Teilen des temporalen Kortex bzw. des limbischen Systems verbunden und ihm wird eine wichtige Rolle in der Pathogenese der Schizophrenie als Teil eines dysfunktionalen …
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Modelling the Neuropsychopharmacology of Obsessive-Compulsive Disorder in the Common Marmoset (Callithrix jacchus)
… (OCD) are considered. The orbitofrontal cortex (OFC) and striatum are key brain structures involved in reversal learning, as are the neurotransmitters serotonin (5-hydroxytryptamine, 5-HT) and dopamine (DA) within those respective regions. However, there has been little empirical evidence of how …
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Design, Analysis And Implementation Of Orthogonal Frequency Coding In Saw Devices Used For Spread Spectrum Tags And Sensors
… the concept of orthogonal frequency coding (OFC) for applications to SAW sensor technology. OFC offers all advantages inherent to spread spectrum communications including enhanced processing gain and lower interrogation power spectral density (PSD). It is shown that the time ambiguity in the …
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Optimism and the brain: trait optimism mediates the protective role of orbitofrontal cortex gray matter volume against anxiety
… level, reduced volume in orbitofrontal cortex (OFC) has been linked to increased vulnerability to anxiety, whereas intact functioning of the same region seems to promote resilience and is associated with trait optimism. However, so far it is not clear whether these two factors, personality and …
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Interactions Between Medical Prefrontal Cortex, Orbitofrontal Cortex and Motor Cortex in Value-based Decision Making
… and action value in orbitofrontal cortex (OFC) and medial prefrontal cortex (mPFC) of rats performing a dynamic two-armed bandit (TAB) task. And we also examined neuronal activity in the lateral (AGl) and medial (AGm) agranular cortex, corresponding to the primary and secondary motor …
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Optical frequency comb generation in optical fibres
Optical frequency combs (OFC) constitute an array of phase-correlated equidistant spectral lines with nearly equal intensities over a broad spectral range. The adaptations of combs generated in mode-locked lasers proved to be highly efficient for the calibration of high-resolution (resolving power …
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Representations of Relative Value Coding in the Orbitofrontal Cortex and Amygdala
… in the amygdala and orbitofrontal cortex (OFC) indeed rescale their calculation of the motivational significance of stimuli that predict rewards. We used a "contrast revaluation" task in which the reward associated with one stimulus is held constant while other rewards within a particular …
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Ultra-wideband Spread Spectrum Communications using Software Defined Radio and Surface Acoustic Wave Correlators
… transmitter. Orthogonal frequency coding (OFC) and pseudorandom noise (PN) coding provide a means for spreading of the UWB data. The use of orthogonal frequency coding (OFC) increases the correlator processing gain (PG) beyond that of code division multiple access (CDMA); providing added …
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Roles of orbitofrontal and insular cortices in processing reward variables
… to test the role of the orbitofrontal cortex (OFC) in this process. Rats were trained in a novel intertemporal choice task in which the sequence of delay durations was randomized across trials. The animals tended to choose a small immediate reward more frequently as the delay for a large reward …
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INHIBITORY CONTROL AND ITS RELATION TO PERSONALITY/TEMPERAMENT, EXECUTIVE FUNCTION, AND THE BRAIN
… frontal cortex (SFC) and orbital frontal cortex (OFC) volumes. In order to assess subareas of the OFC and SFC, an innovative parcellation method was used. Results suggested that the temperament and executive function measures of inhibitory control did form a single factor as long as they were …
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Cut-off values and thresholds of allergic reaction during oral food challenge: a retrospective study
… diagnosis worldwide is the oral food challenge (OFC). However, data on the OFC threshold and the efficiency of tests used for FA diagnosis in the South African population are lacking. Methods: A retrospective analysis of all the OFCs carried out at the Red Cross War Memorial Children's Hospital, …
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An Investigation Into The Neural Nature Of Persecutory Ideation
… and a ventral medial orbital prefrontal (vmPFC/OFC) network were associated with distinct forms of distrust. We then revealed only the connectivity between the vmPFC/OFC and lF-P networks predicted persecutory ideation, suggesting a role of weakened top-down control on subjective valuation. …
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Optimal anticipatory control as a theory of motor preparation
… can be achieved by optimal feedback control (OFC) of the cortical state via a thalamo-cortical loop. Under OFC, the state of the cortex is selectively controlled along state-space directions that have future motor consequences, and not in other inconsequential ones. We show that OFC enables …
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Functional Connectivity of Reward Networks: Characterizing Mechanistic Underpinnings Involved in Positive Affect Deficits within Social Anxiety Disorder
… regions of interest (ROIs)-couplings (i.e., OFC and insula, OFC and subgenual cingulate, insula and cingulate, and cingulate and subgenual cingulate) and diminished PA were present in individuals with SAD, but not controls. Lastly, results demonstrated that individuals with SAD had higher …
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Revealing Preferences: a neuroeconometric approach to understanding decision-making behaviour
… brain imaging experiment showed that the OFC represented preferences as defined by empirically obtained indifference curves. Based on the findings we reasoned that the OFC computes an economic value; that is a subjective preference for a reward, independent of its strict physical …
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Substrates of social functioning in individuals with VCFS
… prefrontal cortex (PFC), orbitofrontal cortex (OFC), dorsolateral prefrontal cortex (DLPFC), insula, superior temorpal sulcus (STS), and anterior cingulate cortex (ACC) volumes relative to controls. In addition, scores on the Child Behavior Checklist (CBCL), a measure assessing problematic …
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Characterising trait anxiety in the common marmoset (Callithrix jacchus): investigations into behavioural, psychophysiological and cognitive phenotypes
… flexibility tests: an orbitofrontal cortex (OFC)-dependent incongruent object discrimination test and a lateral prefrontal cortex (lPFC)-dependent detour reaching rule transfer test. Whilst group differences did not reach significance, the two biomarkers of fear over-generalisation, the …
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CHARACTERIZATION OF FRONTAL CORTICAL CIRCGRIN2B_011731 IN OPIOID-INDUCED NEUROADAPATIONS
… we show that knock-down of orbitofrontal cortex (OFC) circGrin2b significantly reduces heroin intake during self-administration, while only non-significantly reducing heroin-seeking phenotypes. This suggests that OFC circGrin2b is functionally relevant to heroin self-administration phenotypes. …
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