Book contents
- Cognitive Changes and the Aging Brain
- Cognitive Changes and the Aging Brain
- Copyright page
- Dedication
- Contents
- Contributors
- Chapter 1 Introduction
- Chapter 2 Anatomic and Histological Changes of the Aging Brain
- Chapter 3 Cellular and Molecular Mechanisms for Age-Related Cognitive Decline
- Chapter 4 Neuroimaging of the Aging Brain
- Chapter 5 Changes in Visuospatial, Visuoperceptual, and Navigational Ability in Aging
- Chapter 6 Chemosensory Function during Neurologically Healthy Aging
- Chapter 7 Memory Changes in the Aging Brain
- Chapter 8 Aging-Related Alterations in Language
- Chapter 9 Changes in Emotions and Mood with Aging
- Chapter 10 Aging and Attention
- Chapter 11 Changes in Motor Programming with Aging
- Chapter 12 Alterations in Executive Functions with Aging
- Chapter 13 Brain Aging and Creativity
- Chapter 14 Attractor Network Dynamics, Transmitters, and Memory and Cognitive Changes in Aging
- Chapter 15 Mechanisms of Aging-Related Cognitive Decline
- Chapter 16 The Influence of Physical Exercise on Cognitive Aging
- Chapter 17 Pharmacological Cosmetic Neurology
- Chapter 18 Cognitive Rehabilitation in Healthy Aging
- Chapter 19 Preventing Cognitive Decline and Dementia
- Index
- References
Chapter 15 - Mechanisms of Aging-Related Cognitive Decline
Published online by Cambridge University Press: 30 November 2019
- Cognitive Changes and the Aging Brain
- Cognitive Changes and the Aging Brain
- Copyright page
- Dedication
- Contents
- Contributors
- Chapter 1 Introduction
- Chapter 2 Anatomic and Histological Changes of the Aging Brain
- Chapter 3 Cellular and Molecular Mechanisms for Age-Related Cognitive Decline
- Chapter 4 Neuroimaging of the Aging Brain
- Chapter 5 Changes in Visuospatial, Visuoperceptual, and Navigational Ability in Aging
- Chapter 6 Chemosensory Function during Neurologically Healthy Aging
- Chapter 7 Memory Changes in the Aging Brain
- Chapter 8 Aging-Related Alterations in Language
- Chapter 9 Changes in Emotions and Mood with Aging
- Chapter 10 Aging and Attention
- Chapter 11 Changes in Motor Programming with Aging
- Chapter 12 Alterations in Executive Functions with Aging
- Chapter 13 Brain Aging and Creativity
- Chapter 14 Attractor Network Dynamics, Transmitters, and Memory and Cognitive Changes in Aging
- Chapter 15 Mechanisms of Aging-Related Cognitive Decline
- Chapter 16 The Influence of Physical Exercise on Cognitive Aging
- Chapter 17 Pharmacological Cosmetic Neurology
- Chapter 18 Cognitive Rehabilitation in Healthy Aging
- Chapter 19 Preventing Cognitive Decline and Dementia
- Index
- References
Summary
Unlike the degenerative disorders that cause dementias, which stem from a modest number of aberrant processes, aging-related cognitive changes reflect a host of mechanisms. These include mechanisms associated with a person’s condition, e.g., drugs, pain, depression, and sleep disorders. They include mechanistic changes linked to the aging process, e.g., enhanced neural network noise, increased neighborhood density, age of acquisition effects, degraded selective engagement of neural networks, alteration of the balance between volitional and reactive intention and attention, declines in neurotransmitter function, and brain ontogenesis over the life span. They include changes best characterized as senescent physiology and best demonstrated in decline in functions essential to episodic memory formation related to impaired encoding in the hippocampal cornu amonis (CA) fields and slowed neurogenesis in the hippocampal dentate gyrus. Finally, they include processes best characterized as senescent pathology, the best understood being degradation of myelin and associated reduction of central conduction velocities and slowing of processing speed. No longer should cognitive changes associated with aging be viewed as a simple manifestation of a unitary aging process. The large number of mechanisms at play and their complexity offer many opportunities for therapeutic intervention.
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- Cognitive Changes and the Aging Brain , pp. 226 - 244Publisher: Cambridge University PressPrint publication year: 2019