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Related Concept Videos

Dementia01:30

Dementia

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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.
The progression of dementia is generally gradual....
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Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
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Nervous tissue is a vital component of the human body's communication system, enabling us to perceive and respond to stimuli. However, like all other tissues, it is vulnerable to disorders and diseases that can significantly impact our neurological functioning.
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Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is...
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The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the...
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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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Related Experiment Video

Updated: Apr 11, 2026

Assessing Iron Deposition in the Brains of 5xFAD Mice by Perls'/DAB Staining
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Brain function, disease and dementia.

Malarvizhi Babu Sandilyan1, Tom Dening

  • 1Berkshire Healthcare NHS Foundation Trust, Reading, England.

Nursing Standard (Royal College of Nursing (Great Britain) : 1987)
|May 28, 2015
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Summary
This summary is machine-generated.

This article explains normal brain function and how brain region damage causes dementia symptoms. Understanding dementia's molecular basis, including genetics, may lead to future treatments.

Keywords:
Alzheimer’s diseasebrain functiondementiadementia with Lewy bodiesfrontotemporal dementiageneticslimbic systemneurotransmittersvascular dementia

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Area of Science:

  • Neuroscience
  • Pathology
  • Genetics

Background:

  • Dementia arises from various brain diseases, impacting cognitive functions.
  • Understanding brain localization of functions is crucial for diagnosing dementia based on affected areas.
  • Common dementia types (Alzheimer's, vascular, Lewy body, frontotemporal) exhibit distinct pathological changes.

Purpose of the Study:

  • To explain normal brain function and functional localization.
  • To correlate specific brain regions with dementia symptoms.
  • To review common dementia types and their microscopic changes.

Main Methods:

  • Review of normal brain anatomy and function.
  • Discussion of neuropathological differences in common dementia types.
  • Exploration of genetic factors and molecular mechanisms in dementia.

Main Results:

  • Specific brain areas are responsible for distinct cognitive functions.
  • The location and type of brain damage determine dementia symptoms.
  • Molecular and genetic research is advancing the understanding of dementia.

Conclusions:

  • Dementia's varied symptoms depend on the affected brain regions.
  • Genetic and molecular insights offer potential pathways for novel dementia therapies.