scholarly journals Cortical Structure and Cognition in Infants and Toddlers

2019 ◽  
Vol 30 (2) ◽  
pp. 786-800 ◽  
Author(s):  
Jessica B Girault ◽  
Emil Cornea ◽  
Barbara D Goldman ◽  
Shaili C Jha ◽  
Veronica A Murphy ◽  
...  
Keyword(s):  
Cognitive Ability ◽  
Cortical Thickness ◽  
Cognitive Abilities ◽  
Maternal Education ◽  
General Cognitive Ability ◽  
Infants And Toddlers ◽  
Cognitive Domains ◽  
Cortical Structure ◽  
Cortical Regions ◽  
Visual Reception

ABSTRACTCortical structure has been consistently related to cognitive abilities in children and adults, yet we know little about how the cortex develops to support emergent cognition in infancy and toddlerhood when cortical thickness (CT) and surface area (SA) are maturing rapidly. In this report, we assessed how regional and global measures of CT and SA in a sample (N = 487) of healthy neonates, 1-year-olds, and 2-year-olds related to motor, language, visual reception, and general cognitive ability. We report novel findings that thicker cortices at ages 1 and 2 and larger SA at birth, age 1, and age 2 confer a cognitive advantage in infancy and toddlerhood. While several expected brain–cognition relationships were observed, overlapping cortical regions were also implicated across cognitive domains, suggesting that infancy marks a period of plasticity and refinement in cortical structure to support burgeoning motor, language, and cognitive abilities. CT may be a particularly important morphological indicator of ability, but its impact on cognition is relatively weak when compared with gestational age and maternal education. Findings suggest that prenatal and early postnatal cortical developments are important for cognition in infants and toddlers but should be considered in relation to other child and demographic factors.

scholarly journals Physical frailty and decline in general and specific cognitive abilities: the Lothian Birth Cohort 1936

2019 ◽  
Vol 74 (2) ◽  
pp. 108-113 ◽  
Author(s):  
Catharine Gale ◽  
Stuart J Ritchie ◽  
John M Starr ◽  
Ian J Deary
Keyword(s):  
Cognitive Ability ◽  
Birth Cohort ◽  
Processing Speed ◽  
Cognitive Abilities ◽  
General Cognitive Ability ◽  
Visuospatial Ability ◽  
Physical Frailty ◽  
Cognitive Domains ◽  
Memory Processing ◽  
Lothian Birth Cohort

BackgroundPhysical frailty is associated with many adverse outcomes including disability, chronic disease, hospitalisation, institutionalisation and death. It is unclear what impact it might have on the rate of normal cognitive ageing. We investigated whether physical frailty was related to initial level of, and change in, cognitive abilities from age 70 to 79 years.MethodParticipants were 950 members of the Lothian Birth Cohort 1936. Physical frailty was assessed at age 70 years using the Fried criteria. Cognitive function was assessed at ages 70, 73, 76 and 79 years. We used linear regression to examine cross-sectional and prospective associations between physical frailty status at age 70 years and factor score estimates for baseline level of and change in four cognitive domains (visuospatial ability, memory, processing speed and crystallised ability) and in general cognitive ability.ResultsPhysical frailty, but not prefrailty, was associated with lower baseline levels of visuospatial ability, memory, processing speed and general cognitive ability after control for age, sex, education, depressive symptoms, smoking and number of chronic illnesses. Physical frailty was associated with greater decline in each cognitive domain: age-adjusted and sex-adjusted standardised regression coefficients (95% CIs) were: −0.45 (−0.70 to –0.20) for visuospatial ability, −0.32 (−0.56 to –0.07) for memory, −0.47 (−0.72 to −0.22) for processing speed, −0.43 (−0.68 to –0.18) for crystallised ability and −0.45 (−0.70 to –0.21) for general cognitive ability. These associations were only slightly attenuated after additional control for other covariates.ConclusionPhysical frailty may be an important indicator of age-related decline across multiple cognitive domains.

scholarly journals Physical frailty and decline in general and specific cognitive abilities: the Lothian Birth Cohort 1936

2019 ◽  
Author(s):  
Catharine R Gale ◽  
Stuart James Ritchie ◽  
Ian Deary
Keyword(s):  
Cognitive Ability ◽  
Birth Cohort ◽  
Processing Speed ◽  
Cognitive Abilities ◽  
General Cognitive Ability ◽  
Visuospatial Ability ◽  
Physical Frailty ◽  
Cognitive Domains ◽  
Memory Processing ◽  
Lothian Birth Cohort

Background: Physical frailty is associated with many adverse outcomes including disability, chronic disease, hospitalization, institutionalization and death. It is unclear what impact it might have on the rate of normal cognitive ageing. We investigated whether physical frailty was related to initial level of, and change in, cognitive abilities from age 70 to 79 years. Method: Participants were 950 members of the Lothian Birth Cohort 1936. Physical frailty was assessed at age 70 using the Fried criteria. Cognitive function was assessed at ages 70, 73, 76 and 79. We used linear regression to examine the associations between physical frailty status at age 70 and factor score estimates for baseline level of and change in four cognitive domains (visuospatial ability, memory, processing speed, and crystallized ability) and in general cognitive ability.Results: Physical frailty, but not pre-frailty, was associated with lower baseline levels of visuospatial ability, memory, processing speed, and general cognitive ability after control for age, sex, education, depressive symptoms, smoking, and number of chronic illnesses. Physical frailty was associated with greater decline in each cognitive domain: age- and sex-adjusted standardized regression coefficients (95% confidence intervals) were: -0.45 (-0.70, -0.20) for visuospatial ability, -0.32 (-0.56, -0.07) for memory, -0.47 (-0.72, -0.22) for processing speed, -0.43 (-0.68, -0.18) for crystallized ability, and -0.45 (-0.70, -0.21) for general cognitive ability. Further adjustment for the other covariates had only modest attenuating effects on these associations and they remained significant.Conclusion: Physical frailty may be an important indicator of age-related decline across multiple cognitive domains.

What Is IQ? Life Beyond “General Intelligence”

2019 ◽  
Vol 28 (2) ◽  
pp. 189-194 ◽  
Author(s):  
Kristof Kovacs ◽  
Andrew R. A. Conway
Keyword(s):  
Cognitive Ability ◽  
Cognitive Abilities ◽  
Latent Trait ◽  
Cognitive Activity ◽  
General Intelligence ◽  
General Cognitive Ability ◽  
Neural Basis ◽  
Standard View ◽  
Different Content ◽  
Recent Account

For more than a century, the standard view in the field of human intelligence has been that there is a “general intelligence” that permeates all human cognitive activity. This general cognitive ability is supposed to explain the positive manifold, the finding that intelligence tests with different content all correlate. Yet there is a lack of consensus regarding the psychological or neural basis of such an ability. A recent account, process-overlap theory, explains the positive manifold without proposing general intelligence. As a consequence of the theory, IQ is redefined as an emergent formative construct rather than a reflective latent trait. This implies that IQ should be interpreted as an index of specific cognitive abilities rather than the reflection of an underlying general cognitive ability.

scholarly journals Genetic Underpinnings of Increased BMI and Its Association With Late Midlife Cognitive Abilities

2020 ◽  
Vol 6 ◽  
pp. 233372142092526
Author(s):  
Hong Xian ◽  
Brian Boutwell ◽  
Chandra A. Reynolds ◽  
Daphne Lew ◽  
Mark Logue ◽  
...  
Keyword(s):  
Cognitive Ability ◽  
Cognitive Abilities ◽  
Later Life ◽  
Risk Scores ◽  
Linear Regression Models ◽  
Cognitive Domains ◽  
Memory Processing ◽  
Visual Spatial ◽  
Bmi Trajectories ◽  
Multilevel Linear Regression

Objectives: First, we test for differences in various cognitive abilities across trajectories of body mass index (BMI) over the later life course. Second, we examine whether genetic risk factors for unhealthy BMIs—assessed via polygenic risk scores (PRS)—predict cognitive abilities in late-life. Methods: The study used a longitudinal sample of Vietnam veteran males to explore the associations between BMI trajectories, measured across four time points, and later cognitive abilities. The sample of 977 individuals was drawn from the Vietnam Era Twin Study of Aging. Cognitive abilities evaluated included executive function, abstract reasoning, episodic memory, processing speed, verbal fluency, and visual spatial ability. Multilevel linear regression models were used to estimate the associations between BMI trajectories and cognitive abilities. Then, BMI PRS was added to the models to evaluate polygenic associations with cognitive abilities. Results: There were no significant differences in cognitive ability between any of the BMI trajectory groups. There was a significant inverse relationship between BMI-PRS and several cognitive ability measures. Discussion: While no associations emerged for BMI trajectories and cognitive abilities at the phenotypic levels, BMI PRS measures did correlate with key cognitive domains. Our results suggest possible polygenic linkages cutting across key components of the central and peripheral nervous system.

A Quantitative Genetic Analysis of Cognitive Abilities during the Second Half of the Life Span

1992 ◽  
Vol 3 (6) ◽  
pp. 346-353 ◽  
Author(s):  
N.L. Pedersen ◽  
R. Plomin ◽  
J.R. Nesselroade ◽  
G.E. McClearn
Keyword(s):  
Cognitive Ability ◽  
Cognitive Abilities ◽  
Identical Twins ◽  
Early Age ◽  
General Cognitive Ability ◽  
Perceptual Speed ◽  
Twin Design ◽  
Quantitative Genetic ◽  
Specific Cognitive Abilities ◽  
Cognitive Data

Little is known about the importance of genetic effects on individual differences in cognitive abilities late in life. We present the first report from the Swedish Adoption/Twin Study of Aging (SATSA) for cognitive data, including general cognitive ability and 13 tests of specific cognitive abilities. The adoption/twin design consists of identical twins separated at an early age and reared apart (46 pairs), identical twins reared together (67 pairs), fraternal twins reared apart (100 pairs), and fraternal twins reared together (89 pairs); average age was 65 years. Heritability of general cognitive ability in these twins was much higher (about 80%) than estimates typically found earlier in life (about 50%). Consistent with the literature, heritabilities of specific cognitive abilities were lower than the heritability of general cognitive ability but nonetheless substantial. Average heritabilities for verbal, spatial, perceptual speed, and memory tests were, respectively, 58%, 46%, 58%, and 38%.

The Genetic and Environmental Relationship Between General and Specific Cognitive Abilities in Twins Age 80 and Older

1998 ◽  
Vol 9 (3) ◽  
pp. 183-189 ◽  
Author(s):  
Stephen A. Petrill ◽  
Robert Plomin ◽  
Stig Berg ◽  
Boo Johansson ◽  
Nancy L. Pedersen ◽  
...  
Keyword(s):  
Cognitive Ability ◽  
Cognitive Abilities ◽  
Memory Performance ◽  
General Cognitive Ability ◽  
Speed Of Processing ◽  
Processing Abilities ◽  
Genetic And Environmental Factors ◽  
Performance Results ◽  
The Relationship ◽  
Specific Cognitive Abilities

In the first twin study of the old-old, individuals 80 years old and older, we examined the relationship between general and specific cognitive abilities from a genetic perspective. That is, we examined the extent to which genetic and environmental factors influence major group factors of cognitive abilities, independent of general cognitive ability. As part of the OctoTwin project in Sweden, general and specific cognitive abilities were assessed in 52 monozygotic and 65 same-sex dizygotic twin pairs 80 years old and older using a battery of seven tests that assess verbal, spatial, speed-of-processing, and memory performance. Results suggest that genetic effects associated with general cognitive ability (g) account for the correlation between g and verbal, spatial, and speed-of-processing abilities. No genetic influences were found for these specific cognitive abilities separate from g. In contrast, memory ability appears to be more distinct genetically from g than are other cognitive abilities. Comparison with younger samples suggests that cognitive abilities relating to speed of processing may be genetically dedifferentiated in the old-old.

scholarly journals Childhood Obesity, Cortical Structure, and Executive Function in Healthy Children

2019 ◽  
Vol 30 (4) ◽  
pp. 2519-2528 ◽  
Author(s):  
Lisa Ronan ◽  
Aaron Alexander-Bloch ◽  
Paul C Fletcher
Keyword(s):  
Executive Function ◽  
Childhood Obesity ◽  
Cortical Thickness ◽  
Parental Education ◽  
Inferior Frontal Gyrus ◽  
Healthy Children ◽  
Cortical Structure ◽  
Prefrontal Cortical ◽  
Cortical Regions ◽  
The Relationship

Abstract The development of executive function is linked to maturation of prefrontal cortex (PFC) in childhood. Childhood obesity has been associated with changes in brain structure, particularly in PFC, as well as deficits in executive functions. We aimed to determine whether differences in cortical structure mediate the relationship between executive function and childhood obesity. We analyzed MR-derived measures of cortical thickness for 2700 children between the ages of 9 and 11 years, recruited as part of the NIH Adolescent Brain and Cognitive Development (ABCD) study. We related our findings to measures of executive function and body mass index (BMI). In our analysis, increased BMI was associated with significantly reduced mean cortical thickness, as well as specific bilateral reduced cortical thickness in prefrontal cortical regions. This relationship remained after accounting for age, sex, race, parental education, household income, birth-weight, and in-scanner motion. Increased BMI was also associated with lower executive function. Reduced thickness in the rostral medial and superior frontal cortex, the inferior frontal gyrus, and the lateral orbitofrontal cortex partially accounted for reductions in executive function. These results suggest that childhood obesity is associated with compromised executive function. This relationship may be partly explained by BMI-associated reduced cortical thickness in the PFC.

scholarly journals Literacy and Cognitive Function in the Context of Marriage: A Study of Older Mexican Couples

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 859-859
Author(s):  
Joseph Saenz
Keyword(s):  
Older Adults ◽  
Cognitive Function ◽  
Cognitive Ability ◽  
Cognitive Stimulation ◽  
Cognitive Outcomes ◽  
General Cognitive Ability ◽  
Cognitive Domains ◽  
Aging Study ◽  
Cognitive Benefits ◽  
Important Form

Abstract Many studies have reported that literacy is associated with favorable cognitive outcomes in late-life. Few have evaluated whether the cognitive benefits of literacy extend to a spouse’s cognitive ability. Among married husband-wife dyads from the 2012 Mexican Health and Aging Study (n=4,078 dyads), literacy was assessed as self-reported ability to read and write. General cognitive ability was assessed using performance across several cognitive domains. Approximately 11% and 15% of husbands and wives, respectively, could not read or write. For both husbands and wives, both own literacy, and having a spouse who could read and write were independently associated with better cognitive ability even after accounting for both partners’ education. Literacy may represent an important form of capital that may be beneficial to preserve cognitive function among older adults. Benefits of spousal literacy may operate by facilitating access to resources such as information and cognitive stimulation.

scholarly journals Spurious correlations in research on the effects of specific cognitive abilities

2021 ◽  
Author(s):  
Kimmo Sorjonen ◽  
Bo Melin
Keyword(s):  
Cognitive Ability ◽  
Cognitive Abilities ◽  
Test Scores ◽  
Verbal Ability ◽  
Positive Association ◽  
Longitudinal Survey ◽  
The Other ◽  
General Cognitive Ability ◽  
Math Ability ◽  
Specific Cognitive Abilities

Studies on the effect of non-g ability residuals have often employed double adjustment for general cognitive ability (g), as they have calculated the ability residuals adjusting for g and then calculated the effect of the non-g residuals while adjusting for g. The present simulations demonstrate that the double adjustments may result in spurious negative associations between the non-g residual on one cognitive ability, e.g. verbal ability, and variables with a positive association with another ability, e.g. SAT math and math ability. In analyses of the 1997 National Longitudinal Survey of Youth (NLSY97), the negative associations between non-g residuals on verbal and math ability and aptitude test scores on the other ability vanished when not double adjusting for g. This indicates that the observed negative associations may be spurious and not due to differential investment of time and effort in one ability at the expense of the other ability, as suggested in the literature. Researchers of the effects of specific abilities are recommended to validate their findings and interpretations with analyses not double adjusting for g.

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