John D. O’Sullivan

ORCID: 0000-0003-0422-8590
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About
Contact & Profiles
Research Areas
  • Parkinson's Disease Mechanisms and Treatments
  • Neurological disorders and treatments
  • Autism Spectrum Disorder Research
  • EEG and Brain-Computer Interfaces
  • Neurobiology of Language and Bilingualism
  • Genetic Neurodegenerative Diseases
  • Restless Legs Syndrome Research
  • Botulinum Toxin and Related Neurological Disorders
  • Dementia and Cognitive Impairment Research
  • Radio Astronomy Observations and Technology
  • Functional Brain Connectivity Studies
  • Transcranial Magnetic Stimulation Studies
  • Astrophysics and Cosmic Phenomena
  • Acute Ischemic Stroke Management
  • Glycogen Storage Diseases and Myoclonus
  • Nuclear Receptors and Signaling
  • Obsessive-Compulsive Spectrum Disorders
  • Balance, Gait, and Falls Prevention
  • Galaxies: Formation, Evolution, Phenomena
  • Adaptive optics and wavefront sensing
  • Neuroinflammation and Neurodegeneration Mechanisms
  • Alzheimer's disease research and treatments
  • Lysosomal Storage Disorders Research
  • Muscle activation and electromyography studies
  • Cerebrovascular and Carotid Artery Diseases

Royal Brisbane and Women's Hospital
2016-2025

The University of Queensland
2016-2025

Stanford University
2024

The University of Sydney
2015-2024

Royal Prince Alfred Hospital
2023-2024

Cork County Council
2016-2019

Wesley Hospital
2017-2018

Wesley Research Institute
2017-2018

Commonwealth Scientific and Industrial Research Organisation
1985-2016

Astronomy and Space
2015-2016

Multiple lines of evidence point to mitochondrial oxidative stress as a potential pathogenic cause for Parkinson's disease (PD). MitoQ is powerful antioxidant. It absorbed orally and concentrates within mitochondria where it has been shown protect against damage. We enrolled 128 newly diagnosed untreated patients with PD in double-blind study two doses compared placebo explore the hypothesis that, over 12 months, would slow progression measured by clinical scores, particularly Unified...

10.1002/mds.23148 article EN Movement Disorders 2010-06-21

Assigning meaning to words, sounds, and objects requires stored conceptual knowledge plus executive mechanisms that shape semantic retrieval according the task or context. Despite essential role of control in cognition, its neural basis remains unclear. Neuroimaging patient research has emphasized importance left inferior frontal gyrus (IFG)—however, impaired can also follow temporoparietal lesions, suggesting this function may be underpinned by a large-scale cortical network. We used...

10.1093/cercor/bhq180 article EN cc-by-nc Cerebral Cortex 2010-09-17

The Fourier inversion method for reconstruction of images in computerized tomography has not been widely used owing to the perceived difficulty interpolating from polar or other measurement grids Cartesian grid required fast numerical inversion. Although is recognized as being computationally faster than back-projection parallel ray projection data, artifacts resulting inaccurate interpolation have generally limited application method. This paper presents a efficient gridding algorithm which...

10.1109/tmi.1985.4307723 article EN IEEE Transactions on Medical Imaging 1985-12-01

Anxiety disorders are common in Parkinson's disease (PD) patients, yet poorly studied. We examined the prevalence of anxiety PD, investigated association between anxiety, and presentation progression studied for first time contribution putative risk factors PD. A case-series 79 PD patients recruited from neurology out-patient clinics was using DSM-IV criteria. The Unified Disease Rating Scale Hoehn Yahr Staging were employed to understand relationship disorders, clinical severity validated...

10.1002/mds.22833 article EN Movement Disorders 2010-04-13

The Australia SKA Pathfinder (ASKAP) is a new telescope under development as world-class high-dynamic-range wide-field-of-view survey instrument. It will utilize focal plane phased array feeds on the 36 12-m antennas that compose array. large amounts of data present huge computing challenge, and ASKAP store products in an archive after near real-time pipeline processing. This powerful instrument be deployed at radio-quiet observatory, Murchison Radio-astronomy Observatory midwest region...

10.1109/jproc.2009.2016516 article EN Proceedings of the IEEE 2009-07-18

Abstract Background There is reported to be a decline in immune function and an alteration the frequency of circulating lymphocytes with advancing age. are also differences ageing lifespan between males females. We performed this study see if there were females different lymphocyte subsets Results Using flow cytometry we have examined populations peripheral blood leukocytes purified from healthy subjects age ranging third tenth decade. used linear regression analysis determine relationship...

10.1186/1742-4933-7-4 article EN cc-by Immunity & Ageing 2010-03-16
Manu Sharma John P. A. Ioannidis Jan Aasly Grazia Annesi Alexis Brice and 95 more Christine Van Broeckhoven Lars Bertram Maria Bozi David Crosiers Carl E Clarke Maurizio Facheris Matthew J. Farrer Gaëtan Garraux Suzana Gispert Georg Auburger Carles Vilariño‐Güell Georgios M. Hadjigeorgiou Andrew A. Hicks Nobutaka Hattori Beom S. Jeon Suzanne Lesage Christina M. Lill Juei-Jueng Lin Timothy Lynch Peter Lichtner Anthony E. Lang Vincent Mok Barbara Jasińska‐Myga George D. Mellick Karen Morrison Grzegorz Opala Peter P. Pramstaller Irene Pichler Sung Sup Park Aldo Quattrone Ekaterina Rogaeva Owen A. Ross Leonidas Stefanis Joanne Stockton Wataru Satake Peter A. Silburn Jessie Theuns Eng-King Tan Tatsushi Toda Hiroyuki Tomiyama Ryan J. Uitti Karin Wirdefeldt Zbigniew K. Wszołek Georgia Xiromerisiou Kuo-Chu Yueh Yi Zhao Thomas Gasser Demetrius M. Maraganore Rejko Krüger R.S Boyle A Sellbach John D. O’Sullivan Greg T. Sutherland G. Siebert N. Dissanayaka Christine Van Broeckhoven Jessie Theuns David Crosiers Barbara Pickut Sebastiaan Engelborghs Bram Meeus Peter Paul De Deyn Patrick Cras Ekaterina Rogaeva Anthony E. Lang Y. Agid Mathieu Anheim A-M Bonnet Michael Borg Alexis Brice E. Broussolle Jean‐Christophe Corvol Philippe Damier A. Destée Alexandra Dürr F. Durif Suzanne Lesage Ebba Lohmann Pierre Pollak Olivier Rascol François Tison Christine Tranchant François Viallet Marie Vidailhet Christophe Tzourio Philippe Amouyel Marie‐Anne Loriot Eugénie Mutez Aurélie Duflot Jean-Philippe Legendre Nawal Waucquier Thomas Gasser Olaf Rieß Daniela Berg Claudia Schulte

Eleven genetic loci have reached genome-wide significance in a recent meta-analysis of association studies Parkinson disease (PD) based on populations Caucasian descent. The extent to which these effects are consistent across different is unknown.Investigators from the Genetic Epidemiology Parkinson's Disease Consortium were invited participate study. A total 11 SNPs genotyped 8,750 cases and 8,955 controls. Fixed as well random models used provide summary risk estimates for variants. We...

10.1212/wnl.0b013e318264e353 article EN Neurology 2012-07-12

Background and Purpose— To assess the prevalence of premorbid undernutrition its impact on outcomes 1 month after stroke. Methods— The study recruited from consecutive stroke admissions during a 10-month period. Premorbid nutritional status (using subjective global assessment [SGA]), functioning (modified Rankin scale [MRS]), severity (National Institutes Health Stroke Scale [NIHSS] score) were assessed at admission. associations between status, poor outcome (defined as MRS ≥3), mortality...

10.1161/01.str.0000135227.10451.c9 article EN Stroke 2004-06-25

Abstract There is limited evidence for the treatment of orthostatic hypotension in idiopathic Parkinson's disease. The objective this study was to determine efficacy three treatments (nonpharmacological therapy, fludrocortisone, and domperidone). Phase I assessed compliance, safety, nonpharmacological measures. II a double‐blind randomized controlled crossover trial two medications. Primary outcome measures consisted domain Composite Autonomic Symptom Scale (COMPASS‐OD), clinical global...

10.1002/mds.21428 article EN Movement Disorders 2007-06-07

Introduction: The application of low frequency (1 Hz) Repetitive Transcranial Magnetic Stimulation (rTMS) to right hemisphere (RH) language homologues in non-fluent aphasic populations has yielded improvements behavioural function, up

10.3233/nre-2011-0640 article EN Neurorehabilitation 2011-03-23

Amyotrophic lateral sclerosis (ALS) is an adult-onset neurodegenerative disease characterized by the loss of upper cortical and lower motor neurons. ALS causes death within 2–5 years diagnosis. Diet body mass index influence clinical course disease, however there limited information about expression metabolic proteins fat-derived cytokines (adipokines) in ALS. In healthy controls subjects with ALS, we have measured levels adipokines that metabolism. We find altered active ghrelin, gastric...

10.1016/j.jns.2015.06.053 article EN cc-by-nc-nd Journal of the Neurological Sciences 2015-07-07

We previously identified a homozygous mutation in the Golgi SNAP receptor complex 2 gene (GOSR2) six patients with progressive myoclonus epilepsy. To define syndrome better we analysed clinical and electrophysiological phenotype 12 GOSR2 mutations, including new unrelated subjects. Clinical presentation was remarkably similar early onset ataxia (average years of age), followed by myoclonic seizures at average age 6.5 years. Patients developed multiple seizure types, generalized tonic clonic...

10.1093/brain/awt021 article EN Brain 2013-02-28

Background. Motor and nonmotor symptoms negatively influence Parkinson's disease (PD) patients' quality of life. Mindfulness interventions have been a recent focus in PD. The present study explores effectiveness manualized group mindfulness intervention tailored for PD improving both motor neuropsychiatric deficits Methods. Fourteen patients completed an 8-week that included 6 sessions. Five Facet Questionnaire (FFMQ), Geriatric Anxiety Inventory, Hamilton Depression Rating Scale, Cognitive...

10.1155/2016/7109052 article EN cc-by Parkinson s Disease 2016-01-01

We report the discovery of a new 21-cm HI absorption system using commissioning data from Boolardy Engineering Test Array Australian Square Kilometre Pathfinder (ASKAP). Using 711.5 - 1015.5 MHz band ASKAP we were able to conduct blind search for line in continuous redshift range between $z = 0.4$ and 1.0, which has, until now, remained largely unexplored. The is detected at 0.44$ towards GHz-peaked spectrum radio source PKS B1740$-$517 demonstrates ASKAP's excellent capability performing...

10.1093/mnras/stv1532 article EN Monthly Notices of the Royal Astronomical Society 2015-08-24
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