Compensating strategies in collaborative remembering in very old couples

This study investigates collaborative memory performance in very old married couples working in two types of participant constellations, and with two types of memory tasks, i.e. working as couples, or as individuals in episodic or semantic memory tasks. Sixty-two old married couples were a priori classified as high or low on two dimensions suggested to be important for successful collaboration, i.e. responsibility (how division of responsibility was organized) and agreement (how they mutually agreed on each other's view). The episodic memory task was immediate recall of short stories. The semantic memory tasks were to answer questions about names, places, and concepts. The results suggested that: (1) groups outperformed a single individual, but (2) groups in general suffered from collaboration relative to the predicted potential in episodic tasks only, thus replicating earlier results. Nevertheless, (3) the couples scoring high on division of responsibility achieved the same productivity as nominal pairs (i.e. the predicted potential); (4) the couples scoring high on the agreement dimension showed that they were not as affected by collaboration, but then performed less well in "absolute" performance. Finally, the results were discussed in terms of optimal compensation strategies, especially for elderly couples.     

Adult age differences in visual word identification: functional neuroanatomy by positron emission tomography

Adult age differences in the neural systems mediating semantic (context-independent) memory were investigated using positron emission tomography (PET). Younger (20-29 years) and older (62-70 years) participants performed lexical decision (word/nonword discrimination) and nonsemantic (simple visual search) baseline tasks during PET scanning. Within the lexical decision task, display duration and presentation rate were varied across scans. The behavioral data suggested that although an age-related slowing was evident in visual feature and response processing, the retrieval of semantic/lexical information was similar for younger and older adults. For both age groups, lexical-related activation occurred in inferior prefrontal and occipitotemporal regions of the left hemisphere. Differential activation, as a function of age group, was observed in the left occipitotemporal pathway as a result of older adults' maintaining higher levels of neural activity in striate cortex (during visual search) and in inferior temporal cortex (during lexical decision). The prefrontal activation was similar for the two age groups. Thus, although this form of semantic memory retrieval does not undergo significant age-related decline, an age-related change in the associated pattern of neural activation is evident. These findings differ from previous neuroimaging studies of episodic (context-dependent) memory retrieval, which have suggested that age-related compensatory mechanisms are expressed primarily by greater activation of prefrontal regions for older adults than for younger adults.     

Attentional control in the aging brain: insights from an fMRI study of the stroop task

Several recent studies of aging and cognition have attributed decreases in the efficiency of working memory processes to possible declines in attentional control, the mechanism(s) by which the brain attempts to limit its processing to that of task-relevant information. Here we used fMRI measures of neural activity during performance of the color-word Stroop task to compare the neural substrates of attentional control in younger (ages: 21-27 years old) and older participants (ages: 60-75 years old) during conditions of both increased competition (incongruent and congruent neutral) and increased conflict (incongruent and congruent neutral). We found evidence of age-related decreases in the responsiveness of structures thought to support attentional control (e.g., dorsolateral prefrontal and parietal cortices), suggesting possible impairments in the implementation of attentional control in older participants. Consistent with this notion, older participants exhibited more extensive activation of ventral visual processing regions (i.e., temporal cortex) and anterior inferior prefrontal cortices, reflecting a decreased ability to inhibit the processing of task-irrelevant information. Also, the anterior cingulate cortex, a region involved in evaluatory processes at the level of response (e.g., detecting potential for error), showed age-related increases in its sensitivity to the presence of competing color information. These findings are discussed in terms of newly emerging models of attentional control in the human brain.     

The Effects of Estrogen Replacement Therapy on Neuropsychological Functioning in Postmenopausal Women With and Without Dementia: A Critical and Theoretical Review

We review 42 studies examining the effects of estrogen replacement therapy (ERT) on memory and cognition in nondemented postmenopausal women. Although there are an appreciable number of nonsignificant findings, the number of significant findings favoring ERT users considerably outnumbers the rare findings of better performance in controls. Experimental studies demonstrate a consistent beneficial effect on verbal memory, but these are short-term studies of the more acute effects of ERT. The observational studies suggest that there may be a long-lasting effect of continued ERT on cognitive functioning, but these studies need to be interpreted with caution because of the lack of random assignment and a possible healthy user bias. We also summarize findings from studies on the effects of ERT on Alzheimer's disease (AD). ERT is associated with a decreased risk for dementia, but there is little evidence for a positive effect on cognition in women with AD. Definitive answers to questions about the long-term effects of ERT on cognitive aging and risk of developing AD should be provided by 3 ongoing clinical trials.     

Early Versus Late Onset of Spinal Cord Injury Among the Elderly

The objective of this study is to compare elderly individuals with late (60 years old) versus early (<60 years old) onset spinal cord injury (SCI) across quality of life (QOL) domains for which cross-sectional design was used. The outcome measures selected were secondary medical complications (e.g., pneumonia, autonomic dysreflexia, number of days hospitalized), Functional Independence Measure (FIM), Satisfaction With Life Scale (SWLS), and the Craig Handicap Assessment and Reporting Technique (CHART). Analyses between groups showed that individuals with SCI onset 60 years of age or older were significantly older, had a greater proportion of incomplete lesions, were more likely to have SCI resulting from medical complication, and were less likely to be working. After controlling for differences in demographic and lesion characteristics, the majority of QOL domains were similar between groups. However, overall self-reported handicap (CHART-total score) was significantly greater among elderly with late onset SCI, particularly in the areas of physical independence and social integration. Differences in QOL between elderly with late versus early onset SCI were most prominent in the area of physical independence and social integration. The importance of appropriate statistical control, theoretical implications, and future directions are discussed.     

Different Ways to Hurt: An Elderly Woman's Narrative of Suffering

This article presents and interprets the case study of an elderly woman's story of suffering. It results from interviews conducted with African-American and Caucasian men and women, aged 70 and above, concerning their personal definitions, attributions, and theories about suffering. Elders' experiences of suffering were examined under the rubrics of gerontology, narrative, and religious studies. Key themes offered in this case study are: (a) How the life course unfolds because of or despite suffering, (b) what moral status an elder confers on past or present suffering, (c) how a personal sense of the sacred accommodates suffering, (d) how this particular respondent alters her identity based on assimilating the new information of suffering, and (e) how the story of suffering stands out against or blends in with the backdrop of the life story. The uniqueness of this case study also mirrors commonalities of elders' narratives of suffering, particularly those of women. This elder's story demonstrates that smaller individual suffering is rooted in the frame of the larger public world. It also illustrates that the language women use to attribute, define, and theorize suffering is embedded in relationships.     

Dopamine and cognitive functioning: brain imaging findings in Huntington's disease and normal aging

Recent brain imaging studies in Huntington's disease (HD) and normal aging suggest a relationship between central dopaminergic neurotransmission and cognitive performance. Results demonstrate substantial losses in dopamine (DA) function in both HD and aging. Moreover, HD patients and older adults show deficits across multiple cognitive domains, including episodic memory, speed of processing, and executive functioning. Although few studies are available at present, there is converging evidence that multiple measures of pre- and postsynaptic DA biochemistry are (a) highly interrelated, and (b) strongly associated with the cognitive deficits that accompany HD and aging. There is also emerging evidence that DA neurotransmission influences cognitive performance independent of HD or age. In general, the research reviewed in this article indicates that the nigrostriatal DA system is an important component of a frontostriatal circuitry that is critically involved in cognitive functioning.     

Towards the Postmodernization of Aging: The Body and Social Theory

This article reviews the significance of postmodernism as applied to understanding social gerontology. We begin by looking at the disciplinary dominance of biomedical models to understanding bodily change through later life. We then move our analysis to the lack of theoretical models within social gerontology which have not attempted to analyze or develop social explanations of the body. The article introduces the concept of postmodernism and reviews the work of major theorists who have impacted postmodern gerontology. We conclude by arguing for an interface between social theory and social gerontology by drawing on recent examples of the mask of aging thesis, biotechnologies, and new technologies that impact aging identity and understanding the self.     

The Loss of Aging Identity: Social Theory, Old Age, and the Power of Special Hospitals

Medical and health languages have emerged as master narratives used to police the identities that older offenders adopt in contemporary special hospitals such as Broadmoor, Rampton, and Ashworth, in the United Kingdom. Both contain continually changing technologies that function to mediate relations between older offenders and special hospitals. Medical and institutional discourses have been presented as reducing limitations associated with psychiatric disorders. This represents an increase in professional control that can be exerted on inmates' lifestyles in special hospitals which extends to the surveillance and governance of older persons in such secure settings. It is evident that the use of the indeterminate sentence, compulsory treatment prevents older offenders from rehabilitation. The process of treatment is to transform, discipline and normalize their behavior. In order to achieve normalization, coercive forms of treatment are invoked from informal social rules to the use and overuse of psychothropic drugs. Mentally disordered older offenders are placed under the gaze of perpetual surveillance but find ways of negotiating, resisting, and subverting that gaze. Furthermore, this article illuminates how the aging body and the use of time become other sources of punishment, which are pivotal to the structural organization of secure settings in the United Kingdom.