Frontal and subcortical contribution to visual hallucinations in dementia with Lewy bodies and Parkinson's disease.

Conclusion. Frontal and striatal GM atrophy may contribute to the emergence of VH in DLB, which may be fostered by the more severe attention deficits. Striatal GM loss and executive dysfunction, instead, appeared to underlie VH in PD without dementia. PMID: 31422718 [PubMed - as supplied by publisher]
Source: Postgraduate Medicine - Category: Internal Medicine Tags: Postgrad Med Source Type: research

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In this study, researchers studied 438,952 participants in the UK Biobank, who had a total of 24,980 major coronary events - defined as the first occurrence of non-fatal heart attack, ischaemic stroke, or death due to coronary heart disease. They used an approach called Mendelian randomisation, which uses naturally occurring genetic differences to randomly divide the participants into groups, mimicking the effects of running a clinical trial. People with genes associated with lower blood pressure, lower LDL cholesterol, and a combination of both were put into different groups, and compared against those without thes...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
LOS ANGELES (AP) — Scientists are closing in on a long-sought goal — a blood test to screen people for possible signs of Alzheimer’s disease and other forms of dementia. On Monday at the Alzheimer’s Association International Conference, half a dozen research groups gave new results on various experimental tests, including one that seems 88% accurate at indicating Alzheimer’s risk. Doctors are hoping for something to use during routine exams, where most dementia symptoms are evaluated, to gauge who needs more extensive testing. Current tools such as brain scans and spinal fluid tests are too ex...
Source: WBZ-TV - Breaking News, Weather and Sports for Boston, Worcester and New Hampshire - Category: Consumer Health News Authors: Tags: Health News Alzheimer's Disease Dementia Source Type: news
We would like to thank dr. Wang and his colleagues for their interest in our study. While the authors address important measures to assess the validity of a meta-analysis such as heterogeneity between studies, the pooling of Parkinson's disease (PD) patients with mild cognitive impairment (PD-MCI) and patients with dementia (PDD) and the ON or OFF state during scanning, it is important to recognize the need for sufficient power when performing subgroup analyses.
Source: Parkinsonism and Related Disorders - Category: Neurology Authors: Tags: Correspondence Source Type: research
Conclusions: Subjects with TBI ≥ 3 have significantly higher glucose uptake in the dorsal thalamus and cingulate gyrus when compared to subjects with TBI ≤ 2. Cerebral glucose uptake is generally thought to be associated with physiologic metabolism within the gray matter structures of the brain associated with activation of neuronal tissue. An alternative source of increased glucose uptake could be from inflammatory processes. Prior studies with 11C-PK11195 PET, a marker of microglial activation, have demonstrated a link between traumatic brain injury and chronic inflammation which may predispose mTBI subjects to ...
Source: Journal of Nuclear Medicine - Category: Nuclear Medicine Authors: Tags: Neurology & amp; Psychiatry Imaging Posters Source Type: research
Conclusions: The use of antidepressants, especially SNRIs, was associated with a shorter survival time of sCJD patients. The possible changes in neurotransmitters should be emphasized. Scientifically, this study may provide insights into the mechanism of CJD. Clinically, it may contribute to the early diagnosis of CJD.IntroductionDepression is common in the elderly. Its prevalence rate is as high as 11.19%, and this increases progressively with worsening cognitive impairment (1). The presence of depression is an acknowledged risk factor for dementia (2); it can even double the risk for Alzheimer’s disease (AD) (3, 4)...
Source: Frontiers in Psychiatry - Category: Psychiatry Source Type: research
This article highlights some of these challenges in the design of lifestyle studies in PD, and suggests a more coordinated international effort is required, including ongoing longitudinal observational studies. In combination with pharmaceutical treatments, healthy lifestyle behaviors may slow the progression of PD, empower patients, and reduce disease burden. For optimal care of people with PD, it is important to close this gap in current knowledge and discover whether such associations exist. Introduction Parkinson's disease (PD) is an age-related complex progressive neurodegenerative disorder, with key p...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
Conclusion Taken together, evidence from animal and human studies demonstrates that the brain detects levels of circulating nutrients and hormones and consequently organizes an outward response that contributes to the regulation of whole-body glucose homeostasis. However, there are major knowledge gaps about the exact nature of this response and its relative importance compared to peripheral processes. As we have seen, animal studies have provided an anatomical map of CNS glucose regulation and have identified important neurons and neural circuits involved. Additionally, the CNS sensing of key nutrients and hormones has b...
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Conclusions: This study improves the knowledge on clinical significance of RBD symptoms in ET patients. Our preliminary findings demonstrate that presence of RBD in ET is associated with neurocognitive impairment, but not with cardiac autonomic dysfunction. Further longitudinal studies are needed to investigate whether ET patients with RBD will develop a frank dementia over the time. Introduction Essential tremor (ET) is one of the most common neurological disease among adults. Traditionally, it is defined by a core of clinical motor symptoms characterized by kinetic/postural tremor affecting hand, head, or other par...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
Conclusions: Lifestyle factors, such as physical activity, sleep, and social activity appear to be associated with cognitive function among older people. Physical activity and appropriate durations of sleep and conversation are important for cognitive function. Introduction Dementia is a major public health issue worldwide, with a serious burden for patients, caregivers, and society, as well as substantial economic impacts (1). Although the prevalence of late-life cognitive impairment and dementia are expected to increase in future, effective disease-modifying treatments are currently unavailable. Therefore, unders...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
Beta Amyloid Deposition Is Not Associated With Cognitive Impairment in Parkinson's Disease Tracy R. Melzer1,2,3†, Megan R. Stark1,2†, Ross J. Keenan1,4, Daniel J. Myall1, Michael R. MacAskill1,2, Toni L. Pitcher1,2,3, Leslie Livingston1,2, Sophie Grenfell1, Kyla-Louise Horne1,2, Bob N. Young1, Maddie J. Pascoe1, Mustafa M. Almuqbel1,2,4, Jian Wang5, Steven H. Marsh6, David H. Miller1,2,7, John C. Dalrymple-Alford1,2,3,8 and Tim J. Anderson1,2,3,9* 1New Zealand Brain Research Institute, Christchurch, New Zealand 2Department of Medicine, University of Otago, Christchurch, New Zealand 3Brain Rese...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
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