How Learning Abilities Change in Older Adults / ITech content

Lifelong learning has become an integral part of modern society. The question of how to cope with changes in memory and attention with age is becoming increasingly relevant. Although many believe that learning becomes more difficult with age due to cognitive decline, research shows that people are capable of adapting to new environments and continuing to learn throughout their lives. It's important to approach the learning process wisely, using effective methods and approaches that help stimulate mental activity. Thus, lifelong learning becomes accessible and beneficial for people of all ages, promoting personal and professional development.

In this article, we explore what science says about learning abilities in older age. You'll learn about current research that confirms that older adults can successfully acquire new skills and knowledge. We'll discuss factors that influence learning in adulthood, such as cognitive changes, motivation, and experience. You'll also learn about methods that help improve learning and maintain mental alertness in later life. Scientific evidence shows that learning in old age is not only possible, but also brings significant benefits for mental and emotional health.

how the brain changes during healthy aging;
what happens to learning abilities;
who maintains good memory and clear thinking longer.

How the brain changes with age

According to the World Health Organization, the boundary between middle and old age begins at 60 years of age, and 75 years is considered the beginning of old age. Although age-related changes can appear both earlier and later, on average, their manifestations become noticeable after reaching the age of 60. It is important to keep in mind that these changes can vary depending on the individual characteristics of a person and their lifestyle.

Brain aging occurs simultaneously with processes affecting the entire body and depends on many factors. Genetics plays a key role—some people inherit a predisposition to longevity from their parents. Epigenetic factors also play a role: different genes are activated in different environments, leading to even identical twins aging differently if they live in different climates. With age, changes in metabolism and a weakened immune system are observed, which also impact brain health. Maintaining an active lifestyle and a healthy diet can slow these processes and improve quality of life in old age. Aging has a significant impact on the brain, which is associated with changes in the nervous system of older people. These changes can impede cognitive function and emotional regulation. A detailed study of brain aging processes and their consequences is presented in one of the volumes of the Handbook of Clinical Neurology, published by Elsevier. In particular, the chapter on the neuropsychology of aging was prepared by researchers from the University of Florida (USA). This work highlights the importance of understanding neuropsychological changes that occur in old age and their impact on quality of life.

Still: film "The Notebook" / Gran Via

Researchers Several patterns of brain changes that occur during aging are identified. It's important to understand that the manifestations of these changes can vary significantly among individuals. Each organism is unique, and the signs of aging can manifest with varying degrees of severity.

Atrophy. Many areas of the brain shrink, as if "shrinking." First of all, the cerebral cortex, which by the age of 90 loses an average of 14% of its volume achieved in youth. At the same time, the ventricles of the brain—the cavities filled with cerebrospinal fluid—enlarge. However, in healthy people (unlike those suffering from Alzheimer's disease and other similar ailments), the neurons themselves almost never die. Brain structures shrink and lose shape, probably due to a reduction in the number of connections between neurons. It is precisely thanks to neural connections that information processing, memorization, and retrieval of memories, as well as all other cognitive processes important for learning and life, are possible.
White matter degradation. White matter in the brain is the name given to the cells that support the functioning of neurons and the connections between them. For example, axon sheaths—the long processes of neurons through which signals pass from cell to cell—are made of white matter. With age, white matter tears in some areas, while in others, on the contrary, it becomes too abundant.
Decreased blood supply. Small blood vessels narrow and become blocked, the growth of new capillaries is reduced, and certain areas of the brain begin to suffer from a lack of blood supply.
Decreased neurotransmitter concentrations. The brain of older people produces fewer of these substances than in youth. Because of this, signals from cell to cell are transmitted more poorly. For example, the neurotransmitter glutamic acid is important for the memory mechanism.
Appearance of protein abnormalities. Abnormal protein accumulations are observed (even in those who have not been diagnosed with Alzheimer's or another disease).

How Cognitive Abilities Change with Age

The elderly brain is physically different from the young brain, but the effect of age on cognitive abilities is not always straightforward. Some skills remain stable despite physiological changes. For example, in intelligence tests, people over 60 often demonstrate better results in such indicators as vocabulary size and text comprehension. This suggests that life experience and accumulated knowledge can compensate for some age-related changes in the brain, while maintaining high cognitive activity.

Language skills in older people, as a rule, remain at a high level. They can be viewed as a manifestation of crystallized intelligence, which includes knowledge and skills accumulated throughout life. In healthy older adults, these skills are well preserved, indicating the stability and resilience of cognitive functions in old age.

The ability to learn new information, known as fluid intelligence, tends to decline with age. One reason for this is that learning new information depends on the formation of new neural connections, which becomes more challenging with age. This may be due to a lack of neurotransmitters needed to maintain effective brain function. Thus, maintaining cognitive activity and a healthy lifestyle can help slow down this process and improve learning abilities throughout life.

Still: film "45 Years" / The Bureau / British Film Institute

As we age, neurons become less efficient at forming new connections, which reduces the ability of older adults to retain information in short-term memory. This also makes it difficult to switch between tasks and maintain attention on specific objects, especially in the presence of distractions. These changes significantly impact the process of learning and the perception of new information.

Declining cognitive function does not preclude the ability of healthy older adults to successfully learn and remember new information. Although they are able to assimilate knowledge, they tend to take longer to do so compared to young and middle-aged adults. This is important to consider for developers of educational programs aimed at an older audience. Effective teaching methods can significantly increase the level of engagement and material absorption among older students, which promotes their active participation in the educational process.

Complex cognitive abilities, such as decision-making and analytical thinking, are subject to change with age. However, measuring them in a laboratory setting is significantly difficult. However, it can be argued that in most cases, these skills are preserved because they are associated with crystallized intelligence. Problems occurring in one area of the neural networks can be compensated for by activity in other areas of the brain, allowing cognitive function to be maintained at an acceptable level even in adulthood.

In old age, cognitive abilities become more vulnerable. Stress, injury, and illness, which young people can tolerate relatively easily, are more likely to lead to cognitive decline in older people. This emphasizes the importance of taking care of your mental health and maintaining mental activity in old age. Regular brain exercise, a healthy lifestyle, and social activity can help slow this process and maintain mental clarity.

Who maintains cognitive abilities longer?Scientists say that cognitive decline in old age is inevitable, but the degree of these changes varies from mild cognitive decline to dementia. The difference between simple difficulty memorizing, for example, new poems or foreign words, and a complete inability to absorb new information is significant. Why do some people manage to maintain higher cognitive functions? Research shows that factors such as education level, physical activity, social connections, and proper nutrition can significantly influence brain health in old age. Maintaining an active lifestyle and ongoing learning play an important role in maintaining cognitive health.
Two key terms are used to answer this question:
brain reserve—the presence of healthy areas of the brain that can take over certain functions of damaged areas;
and cognitive reserve, or behavioral brain reserve—certain individual thinking characteristics that help cope with the consequences of traumatic, pathological, or age-related brain damage.
The concept of cognitive reserve was proposed by neuroscientist Jacob Stern of Columbia University about 20 years ago. This concept arose in response to the question of why some older people, despite the presence of obvious physiological pathologies of the brain, do not show signs of dementia. Cognitive reserve implies that a person has certain resources that help cope with brain damage and prevent the development of cognitive impairment. Research suggests that factors such as education level, mental activity, and social connections can contribute to the development of cognitive reserve, which in turn may slow the progression of dementia and improve quality of life in older adults.
Cognitive reserve remains a largely theoretical concept that cannot be measured directly. Scientific studies assess it using a number of indicators related to the development and maintenance of cognitive functions. For example, participants' education level, their occupations, especially those requiring intellectual effort, and active participation in mental activities such as reading, extracurricular activities, board games, crosswords, and sudoku are analyzed. These factors contribute to the strengthening of cognitive reserve and may play an important role in maintaining mental activity throughout life.
Cognitive reserve, although not clearly defined, is an important concept in research on aging and the preservation of mental abilities. Numerous studies confirm that cognitive reserve plays a key role in maintaining the ability to learn and adapt in old age. A high level of cognitive reserve may help slow the brain's aging process and resist neurodegenerative diseases, allowing people to maintain activity and mental agility throughout life.
In 2015, British researchers conducted a comprehensive meta-analysis that analyzed the results of 135 studies involving over 128,000 participants. The study found that education level has the most significant impact on cognitive reserve in older adults. The higher the level of education, the better preserved learning abilities are in people over 60 compared to their less educated peers. Although other factors, such as occupation and participation in mentally stimulating activities, are also associated with cognitive ability, their impact was less pronounced. Similar findings were confirmed in a small review conducted by Brazilian scientists in 2017. These results highlight the importance of education in maintaining cognitive activity and health in old age.

Still: film "The Mole Agent" / Filmosonido Estudios / ITVS

Recent studies, not yet included in reviews and meta-analyses, highlight the importance of cognitive reserve as a protective factor. For example, a 2022 British study, based on longitudinal data, included 1,184 respondents born in 1946. The authors, from the Brighton and Sussex Medical School, used a unique metric—the cognitive reserve index—that took into account parameters such as participants' education level at age 26, their leisure time at age 46, and their professional activity at age 53. The researchers also had access to the results of cognitive tests completed by the participants at various points in their lives. These data highlight the link between cognitive reserve and the ability to withstand age-related changes, making this topic particularly relevant for developments in neuropsychology and gerontology.

Participants who reached age 26 with higher education had the highest cognitive reserve index. At age 46, they were actively engaged in six or more additional activities, such as teaching and volunteering. By age 53, they were working in skilled occupations. These factors contributed to better memory and cognitive performance at age 69, regardless of their performance on similar tests in childhood.

Education, intellectual activity, and engaging work throughout life can equalize the cognitive abilities of people with different childhood outcomes. Thus, ongoing development and self-education play a key role in the development of cognitive skills, enabling people to achieve high levels of thinking and creativity, regardless of their initial conditions. This emphasizes the importance of lifelong learning and active participation in professional activities to maintain and improve mental abilities throughout life.

Proficiency in multiple languages is an important aspect of developing cognitive reserve. Bilinguals, using different languages in everyday communication, are forced to constantly activate and switch neural networks. This helps strengthen connections between neurons and slows the aging process of the brain. Thus, knowing multiple languages not only improves communication but also positively impacts cognitive abilities, making bilingualism a valuable resource for maintaining mental health throughout life.

Recent studies by Italian and Russian scientists show that older bilinguals perform better on cognitive tests than their monolingual peers. MRI data suggests that bilinguals experience less loss of gray and white matter in the brain. Furthermore, a 2020 meta-analysis indicates that bilinguals experience a later onset of Alzheimer's disease symptoms, on average, highlighting the benefits of bilingualism for maintaining cognitive function in old age.

Not all studies unanimously support the benefits of bilingualism, and this may be due to differences in the methods they are conducted. For example, researchers often use different criteria to define bilinguals, which influences the results. Such definitional inconsistencies can lead to differences in data interpretation and, consequently, conflicting conclusions about the benefits of bilingualism.

Supporters of the idea that bilingualism is beneficial for the brain emphasize the importance of not only learning a second language in the past, even at a high level, but also actively using it in everyday life. Regularly switching between languages helps maintain cognitive functions. Therefore, it is recommended to regularly read in a foreign language, watch films and news, and communicate with native speakers. This can be both correspondence and face-to-face conversations. Active use of the language helps improve skills and maintain mental abilities at the proper level.

Today, the term "bilingualism" covers not only people who have been bilingual since childhood. Research shows that bilingualism represents a wide range of individual language experiences. Different forms of bilingualism have varying effects on the brain. Learning a new language as an adult also offers significant benefits, including improved cognitive skills and ongoing mental training. This makes language learning an important aspect of personal and intellectual development, promoting greater mental flexibility and improved memory. There are various types of cognitive training that can produce similar results beyond language learning. In this article, we'll discuss evidence-based methods for maintaining brain health in old age. Learn more about the world of education by subscribing to our Telegram channel. We share relevant information, helpful tips, and interesting news from the education sector. Don't miss the opportunity to stay up-to-date on the latest trends and events. Subscribe to our channel and stay in touch!

How Learning Abilities Change in Older Adults / ITech content

Contents:

How the brain changes with age

How Cognitive Abilities Change with Age