What the children tell us: the COVID-19 pandemic and how the world should respond.

While the COVID-19 pandemic and associated mitigation measures have had a devastating impact on children and youth (CY), they were rarely consulted or their views incorporated into the approaches to address the pandemic.The main objective of this review is to present the voices and opinions of CY relative to the impact of the first year of the pandemic, on their lives and the lives of their families, and to present their recommendations as a call to action to adults and governments.The origin of this review was an iterative consultation process involving an international collective of Child Health professionals specialising in Child Rights. The recruitment of articles began by soliciting articles written or recommended by members of our international Child Health professional organisation. We then developed search strategies which were conducted in two phases, with the assistance of medical librarians. We limited our search to articles that sought the direct perspectives and experiences of CY in regard to the first year of COVID-19, and published between February 2020 and February 2021.Two phases of searches identified 8131 studies for screening. Following removal of irrelevant literature, 28 studies were included for the final analysis.CY articulate the detrimental impact of the COVID-19 pandemic to their health, education, protection and basic needs, clearly and intelligently. They make specific recommendations to address the issues they elucidate. They state a need for accurate information that is targeted for them. They ask for recognition as stakeholders and social actors in the pandemic response planning and implementation processes.We assert that the recognition of CY as stakeholders in response planning for COVID-19 and other emerging crises such as climate change, must become a statutory requirement for local, national and international policy-makers. Evidence of CY participation should specifically be reported to and tracked by the Committee on the Rights of the Child.

Paediatric to adult healthcare transition in resource-limited settings: a narrative review.

Background: Ageing into adulthood is challenging at baseline, and doing so with a chronic disease can add increased stress and vulnerability. Worldwide, a substantial care gap exists as children transition from care in a paediatric to adult setting. There is no current consensus on safe and equitable healthcare transition (HCT) for patients with chronic disease in resource-denied settings. Much of the existing literature is specific to HIV care. The objective of this narrative review was to summarise current literature related to adolescent HCT not associated with HIV, in low-income and middle-income countries (LMICs) and other resource-denied settings, in order to inform equitable health policy strategies. Methods: A literature search was performed using defined search terms in PubMed and Cumulative Index to Nursing and Allied Health Literature databases to identify all peer-reviewed studies published until January 2020, pertaining to paediatric to adult HCT for adolescents and young adults with chronic disease in resource-denied settings. Following deduplication, 1111 studies were screened and reviewed by two independent reviewers, of which 10 studies met the inclusion criteria. Resulting studies were included in thematic analysis and narrative synthesis. Results: Twelve subthemes emerged, leading to recommendations which support equitable and age-appropriate adolescent care. Recommendations include (1) improvement of community health education and resilience tools for puberty, reproductive health and mental health comorbidities; (2) strengthening of health systems to create individualised adolescent-responsive policy; (3) incorporation of social and financial resources in the healthcare setting; and (4) formalisation of institution-wide procedures to address community-identified barriers to successful transition. Conclusion: Limitations of existing evidence relate to the paucity of formal policy for paediatric to adult transition in LMICs for patients with childhood-onset conditions, in the absence of a diagnosis of HIV. With a rise in successful treatments for paediatric-onset chronic disease, adolescent health and transition programmes are needed to guide effective health policy and risk reduction for adolescents in resource-denied settings.

Vestibulo-perceptual influences upon the vestibulo-spinal reflex.

The vestibular system facilitates gaze and postural stability via the vestibulo-ocular (VOR) and vestibulo-spinal reflexes, respectively. Cortical and perceptual mechanisms can modulate long-duration VOR responses, but little is known about whether high-order neural phenomena can modulate short-latency vestibulo-spinal responses. Here, we investigate this by assessing click-evoked cervical vestibular myogenic-evoked potentials (VEMPS) during visual roll motion that elicited an illusionary sensation of self-motion (i.e. vection). We observed that during vection, the amplitude of the VEMPs was enhanced when compared to baseline measures. This modulation in VEMP amplitude was positively correlated with the subjective reports of vection strength. That is, those subjects reporting greater subjective vection scores exhibited a greater increase in VEMP amplitude. Control experiments showed that simple arousal (cold-induced discomfort) also increased VEMP amplitude but that, unlike vection, it did not modulate VEMP amplitude linearly. In agreement, small-field visual roll motion that did not induce vection failed to increase VEMP amplitude. Taken together, our results demonstrate that vection can modify the response of vestibulo-collic reflexes. Even short-latency brainstem vestibulo-spinal reflexes are influenced by high-order mechanisms, illustrating the functional importance of perceptual mechanisms in human postural control. As VEMPs are inhibitory responses, we argue that the findings may represent a mechanism whereby high-order CNS mechanisms reduce activity levels in vestibulo-collic reflexes, necessary for instance when voluntary head movements need to be performed.

Ablation of reactive astrocytes exacerbates disease pathology in a model of Alzheimer's disease.

The role of astrocytes in the progression of Alzheimer's disease (AD) remains poorly understood. We assessed the consequences of ablating astrocytic proliferation in 9 months old double transgenic APP23/GFAP-TK mice. Treatment of these mice with the antiviral agent ganciclovir conditionally ablates proliferating reactive astrocytes. The loss of proliferating astrocytes resulted in significantly increased levels of monomeric amyloid-ß (Aß) in brain homogenates, associated with reduced enzymatic degradation and clearance mechanisms. In addition, our data revealed exacerbated memory deficits in mice lacking proliferating astrocytes concomitant with decreased levels of synaptic markers and higher expression of pro-inflammatory cytokines. Our data suggest that loss of reactive astrocytes in AD aggravates amyloid pathology and memory loss, possibly via disruption of amyloid clearance and enhanced neuroinflammation.

Abnormal visuo-vestibular interactions in vestibular migraine: a cross sectional study.

Vestibular migraine is among the commonest causes of episodic vertigo. Chronically, patients with vestibular migraine develop abnormal responsiveness to both vestibular and visual stimuli characterized by heightened self-motion sensitivity and visually-induced dizziness. Yet, the neural mechanisms mediating such symptoms remain unknown. We postulate that such symptoms are attributable to impaired visuo-vestibular cortical interactions, which in turn disrupts normal vestibular function. To assess this, we investigated whether prolonged, full-field visual motion exposure, which has been previously shown to modulate visual cortical excitability in both healthy individuals and avestibular patients, could disrupt vestibular ocular reflex and vestibular-perceptual thresholds of self-motion during rotations. Our findings reveal that vestibular migraine patients exhibited abnormally elevated reflexive and perceptual vestibular thresholds at baseline. Following visual motion exposure, both reflex and perceptual thresholds were significantly further increased in vestibular migraine patients relative to healthy controls, migraineurs without vestibular symptoms and patients with episodic vertigo due to a peripheral inner-ear disorder. Our results provide support for the notion of altered visuo-vestibular cortical interactions in vestibular migraine, as evidenced by vestibular threshold elevation following visual motion exposure.

Biased numerical cognition impairs economic decision-making in Parkinson's disease.

OBJECTIVE: Previous findings suggest a context-dependent bihemispheric allocation of numerical magnitude. Accordingly, we predicted that lateralized motor symptoms in Parkinson's disease (PD), which reflect hemispheric asymmetries, would induce systematic lateralized biases in numerical cognition and have a subsequent influence on decision-making. METHODS: In 20 PD patients and matched healthy controls we assessed numerical cognition using a number-pair bisection and random number generation task. Decision-making was assessed using both the dictator game and a validated questionnaire. RESULTS: PD patients with predominant right-sided motor symptoms exhibited pathological biases toward smaller numerical magnitudes and formulated less favorable prosocial choices during a neuroeconomics task (i.e., dictator game). Conversely, patients with left-sided motor symptoms exhibited pathological biases toward larger numerical magnitudes and formulated more generous prosocial choices. Our account of context-dependent hemispheric allocation of numerical magnitude in PD was corroborated by applying our data to a pre-existing computational model and observing significant concordance. Notably, both numerical biasing and impaired decision-making were correlated with motor asymmetry. INTERPRETATION: Accordingly, motor asymmetry and functional impairment of cognitive processes in PD can be functionally intertwined. To conclude, our findings demonstrate context-dependent hemispheric allocation and encoding of numerical magnitude in PD and how biases in numerical magnitude allocation in Parkinsonian patients can correspondingly impair economic decision-making.