Dementia-related psychosis (DRP) is prevalent across dementias and typically manifests as delusions and/or hallucinations. The mechanisms underlying psychosis in dementia are unknown; however, neurobiological and pharmacological evidence has implicated multiple signaling pathways and brain regions. Despite differences in dementia pathology, the neurobiology underlying psychosis appears to involve dysregulation of a cortical and limbic pathway involving serotonergic, gamma-aminobutyric acid ergic, glutamatergic, and dopaminergic signaling. Thus, an imbalance in cortical and mesolimbic excitatory tone may drive symptoms of psychosis. Delusions and hallucinations may result from (1) hyperactivation of pyramidal neurons within the visual cortex, causing visual hallucinations and (2) hyperactivation of the mesolimbic pathway, causing both delusions and hallucinations. Modulation of the 5-HT2A receptor may mitigate hyperactivity at both psychosis-associated pathways. Pimavanserin, an atypical antipsychotic, is a selective serotonin inverse agonist/antagonist at 5-HT2A receptors. Pimavanserin may prove beneficial in treating the hallucinations and delusions of DRP without worsening cognitive or motor function.

The National Academy of Sciences-National Research Council (NAS-NRC) Twin Registry is one of the oldest, national population-based twin registries in the USA. It comprises 15,924 White male twin pairs born in the years 1917–1927 (N = 31.848), both of whom served in the armed forces, chiefly during World War II. This article updates activities in this registry since the most recent report in Twin Research and Human Genetics (Page, 2006). Records-based data include information from enlistment charts and Veterans Administration data linkages. There have been three major epidemiologic questionnaires and an education and earnings survey. Separate data collection efforts with the NAS-NRC registry include the National Heart, Lung, and Blood Institute (NHLBI) subsample, the Duke Twins Study of Memory in Aging and a clinically based study of Parkinson’s disease. Progress has been made on consolidating the various data holdings of the NAS-NRC Twin Registry. Data that had been available through the National Academy of Sciences are now freely available through National Archive of Computerized Data on Aging (NACDA).

Background: Partners of people with Parkinson's disease (PD) have first-hand knowledge relevant to the management of the person with Parkinson's (PwP). If captured, this knowledge may improve effective care for the PwP. However, there is a lack of research focusing primarily on partners’ experiences of engagement with health professionals working in PD (HPPs).

Methods: Interpretative Phenomenological Analysis (IPA) was used to investigate the meaning of partners’ experiences of engagement with HPPs. Semi-structured interviews with 15 partners of PwP provided primary data. Each interview was digitally recorded, transcribed verbatim and analysed for emerging themes.

Results: Three themes emerged: (i) partners’ lack of entitlement for their own needs to be met; (ii) submersion of self in the partnership and (iii) health professionals as agents of support. Additionally, sub-themes were identified, such as barriers to feeling entitled, setting up a premise for entitlement, and lost identity. Together, these themes highlight the current lack of focus on the partners of PwP. A process model was developed to describe partners’ cyclic progression through the various stages of their experience, and in the process, identifying initiatives for intervention.

Conclusion: Given a lack of focus on the needs of partners of PwP, these preliminary insights could inform the delivery of improved services that support partners. This will ultimately benefit the PwP.