Language changes and Alzheimer's disease: a literature review

Exploring the link between tooth loss, cognitive function, and brain wellness in the context of healthy aging

AIMS

The aim of this study was to evaluate the utility of using MRI-derived tooth count, an indirect and nonspecific indicator of oral/periodontal health, and brain age gap (BAG), an MRI-based measure of premature brain aging, in predicting cognition in a population of otherwise healthy adults.

METHODS

This retrospective study utilized data from 329 participants from the University of South Carolina's Aging Brain Cohort Repository. Participants underwent neuropsychological testing including the Montreal Cognitive Assessment (MoCA), completed an oral/periodontal health questionnaire, and submitted to high-resolution structural MRI imaging. The study compared variability on cognitive scores (MoCA) accounted for by MRI-derived BAG, MRI-derived total tooth count, and self-reported oral/periodontal health.

RESULTS

We report a significant positive correlation between the total number of teeth and MoCA total scores after controlling for age, sex, and race, indicating a robust relationship between tooth count and cognition, r(208) = .233, p < .001. In a subsample of participants identified as being at risk for MCI (MoCA <= 25, N = 36) inclusion of MRI-based tooth count resulted in an R2 change of .192 (H0 = 0.138 → H1 = 0.330), F(1,31) = 8.86, p = .006. Notably, inclusion of BAG, a valid and reliable measure of overall brain health, did not significantly improve prediction of MoCA scores in similar linear regression models.

CONCLUSIONS

Our data support the idea that inclusion of MRI-based total tooth count may enhance the ability to predict clinically meaningful differences in cognitive abilities in healthy adults. This study contributes to the growing body of evidence linking oral/periodontal health with cognitive function.

Quantitative analysis of formal caregivers' use of communication strategies while assisting individuals with moderate and severe Alzheimer's disease during oral care

This cross-sectional observational study examined formal caregivers' use of task-focused and social communication strategies while assisting individuals with moderate and severe Alzheimer's disease residing in a long-term care facility during a basic activity of daily living: toothbrushing. Thirteen formal caregiver-resident dyads were observed during a total of 78 separate toothbrushing sessions. All caregiver utterances occurring during the task were transcribed and coded for type of communication strategy utilizing a multidimensional observational coding scheme, which was developed a priori. Overall, the majority of residents, irrespective of disease severity, successfully completed toothbrushing with the support of caregiver assistance. Caregivers assisting residents with moderate and severe AD were found to use a variety of communication strategies, with task-focused strategies accounting for the majority of use. For the most part, the communicative strategies employed did not differ across disease severity. However, some differences were identified including the use of one proposition, paraphrased repetition, using the resident's name, and provision of full assistance, with these strategies being used more often when assisting individuals with severe AD. This study adds to the emerging literature supporting the use of specific communication strategies while assisting residents with AD during the completion of daily tasks.

LEARNING OUTCOMES

From reviewing this study, readers will be able to identify a variety of communication strategies, both task-focused and relational, that formal caregivers utilize while assisting residents with moderate and severe Alzheimer's disease (AD) during a basic activity of daily living. Furthermore, the reader will be able to distinguish between communication strategies that are optimal when assisting individuals with moderate AD as compared to assisting individuals with severe AD.

Neuroanatomical correlates of cognitive reserve in Alzheimer disease

Cognitive reserve (CR), for which formal education represents a proxy index, has been claimed as a factor mitigating the clinical manifestations of Alzheimer disease (AD). The aim of this study was to assess the impact of formal education in modifying the relationship between cerebral grey matter (GM) damage and clinical manifestations in a large cohort of patients with AD or amnesic mild cognitive impairment (a-MCI). We recruited 22 patients with AD and 23 with a-MCI, and we classified them in subjects with high (HEL) or low educational level (LEL). All patients underwent a neuropsychological assessment and magnetic resonance imaging (MRI) scanning at 3T. T1-weighted volumes were analyzed, using voxel-based morphometry, for GM investigation. A 1-year clinical follow-up was available for part of the a-MCI patients. There were no between-groups differences in clinical features, memory, and language functions. Conversely, HEL subjects performed better in all tests assessing visuo-spatial abilities. GM volumes of LEL compared with HEL patients were reduced in the supramarginal gyrus bilaterally and in the right posterior cingulate/precuneus and frontal opercular cortex. Conversely, HEL compared with LEL patients showed reduced GM volumes in the entorhinal cortices and temporal poles, regions typically affected by AD pathology. These results remained unchanged when including in the analysis of only patients with clinically proven AD (AD and a-MCI converters). This study suggests that CR produces selective GM changes that mitigate the clinical impact of AD. Moreover, it supports the idea that CR is based on several "brain reserves" rather than on a generalized increase of brain plasticity.

Staff's experience of and the management of violent incidents in elderly care

Violence towards staff has become an important issue, since it has been reported to be common in various health care settings. This study aimed to describe emotional reactions among staff being exposed to violence in residential community care for the elderly: to investigate consequences from violent incidents and to describe the management of violent incidents. Data were collected by telephone interviews with nursing staff reporting incidents of violence. During the period of investigation, 97 of 848 staff (11.4%) reported that they had been exposed to violence. More than one-third of them reported subsequent wound and bruises from the incident and two of the exposed staff consulted a doctor because of the violent incident. The most frequently reported reactions among the staff were aggression, astonishment, and antipathy against the perpetrating care recipient, as well as insufficiency, powerlessness, insult and fear. A majority of the incidents were judged as intentionally perpetuating from the care recipient. Most of the violent incidents were managed by informal discussions in the working team. A low number of the reported incidents of violence involved formal discussions with nurse managers.

Giving voice to persons living with dementia: the researcher's opportunities and challenges

Few qualitative studies have examined the experiences of persons living with dementia and little has been written about the opportunities and challenges for the researchers. This article challenges the assumption of dwindling personhood among persons with dementia. Methodological challenges which may be encountered by qualitative researchers are outlined and specific strategies for addressing these challenges are described including: modifying consent/assent procedures, adjusting sample size, facilitating communication, and making the most of the data.

Assessment by nurses of mood, general behaviour and functional ability in patients with dementia receiving nursing home care

The aim of this study was to investigate the reliability of the Patient Mood Assessment Scale (PMAS), the General Behaviour Assessment Scale (GBAS) and the Gottfries Bråne Steen scale and to investigate mood, general behaviour, degree of dementia and symptoms for patients with dementia living permanently in nursing home care (n = 75). Interviews were conducted with the contact nurses, focussing on their view of the patients during the preceding week, based on the above-mentioned assessment scales. In 29 cases a second interview was conducted with another nurse in order to investigate the inter-rater reliability. The inter-rater reliability was high for items associated with ADL and intellectual functions, but low for items associated with emotional aspects. The nurses' difficulties in assessing the patients' emotional state could arise because these matters are not regularly discussed among the staff or could reflect the nurse's inner state rather than that of the patient. The varying understanding that the nurses had of the patients raises the question of whether the care provided is based on the nurses' opinions rather than on the patients' needs. There is a need for continuous and reflective discussions in the staff group, focusing on the patients' physical as well as emotional needs.

Communication patterns between caregivers and their spouses with Alzheimer's disease: a case study

The purpose of this study was to examine the style of communication that takes place between couples in their home environment in relationship to the abilities to the spouse with Alzheimer's disease (AD) and the amount of stress and burden experienced by the caregiver. Three styles of communication emerged: parallel, questioning, and direct. Caregivers engaging in parallel communications reported greater stress and time burden than any other caregivers. Nurses need to be observant of the communication patterns that exist between caregivers and their spouses with AD and help caregivers develop successful communicative strategies that enhance interactions with their spouses.

Communicating with individuals with Alzheimer's disease: examination of recommended strategies

Meaningful conversation with individuals in the later stages of Alzheimer's disease (AD) has been considered difficult if not impossible. Limiting communication to simple concrete subjects and closed-ended questions is frequently recommended. Thirty-five 30 minute conversations with individuals with advanced AD (mean Mini-Mental State Examination [MMSE] = 10) were transcribed and the interactions examined. No significant differences in length or relevance of response by type of question was found indicating that subjects were able to respond to open-ended questions. Use of broad opening statements or questions, establishing commonalities, speaking as equals, and sharing of self-facilitated expression of feeling; recognizing themes with salience for the individual helped to maintain the discussion.