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Dementia01:30

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Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
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The total of all possible kinds of energy present in a substance is called the internal energy (U), sometimes symbolized as E. Suppose a system with initial internal energy, Uinitial, undergoes a change in energy (transfer of work or heat), and the final internal energy of the system is Ufinal. Change in internal energy equals the difference between Ufinal and Uinitial.
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The internal energy of a thermodynamic system is the sum of the kinetic and potential energies of all the molecules or entities in the system. The kinetic energy of an individual molecule includes contributions due to its rotation and vibration, as well as its translational energy. The potential energy is associated only with the interactions between one molecule and the other molecules of the system. Neither the system's location nor its motion is of any consequence as far as the internal...
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Many cellular signals are hydrophilic and therefore cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind to internal, or intracellular, receptors that reside within the cell. Many mammalian steroid hormones use this mechanism of cell signaling, as does nitric oxide (NO) gas.
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The psychodynamic perspective in psychology asserts that most personality functions operate unconsciously, outside of awareness. This means that the motives and emotions driving behavior often remain hidden, automatically buried in the unconscious mind as a defense mechanism to shield us from psychological distress. According to this theory, the unconscious mind contains thoughts, memories, and emotions that are too disturbing to face directly.
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Behaviorists view personality as primarily shaped by environmental reinforcements and consequences. According to this perspective, behavior is influenced by external stimuli, and individuals adjust their actions based on rewards and punishments. Over time, learning histories — accumulated patterns of reinforcement — play a significant role in shaping personality. Behaviors that lead to positive outcomes are reinforced, while those resulting in negative outcomes are diminished.
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Using Retinal Imaging to Study Dementia
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Dementia care: international perspectives.

Alistair Burns1, Philippe Robert2,

  • 1University of Manchester, Manchester, UK.

Current Opinion in Psychiatry
|May 21, 2019
PubMed
Summary
This summary is machine-generated.

International dementia care knowledge is growing, with many countries developing national strategies and resources. This global interest aims to enhance dementia treatment and support for individuals and families worldwide.

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Area of Science:

  • Gerontology
  • Public Health
  • Neurology

Background:

  • Growing global awareness of dementia necessitates sharing international knowledge.
  • Effective dementia care and practice require collaboration and information exchange.

Purpose of the Study:

  • To review international dementia care practices and policies.
  • To identify global trends and future directions in dementia care.

Main Methods:

  • An international survey of dementia care in 47 countries.
  • Local dementia experts provided national narratives on care, treatment, and policies.

Main Results:

  • High national interest and commitment to dementia care globally.
  • Most surveyed countries estimate dementia prevalence, use licensed drugs, and have Alzheimer's associations.
  • Over half of countries have national dementia care plans, with more in development.

Conclusions:

  • Significant increase in dementia awareness and proactive national strategies worldwide.
  • International collaboration can stimulate innovation in dementia care provision.
  • Global efforts are underway to improve dementia treatment and support systems.