Processes and Functions of The Structural Changes of the Brain

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25 Terms

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Neurogenesis

The process of producing new nerve cells (neurons) that transmit information in the nervous system, crucial for cognitive functions like mood regulation and memory encoding.

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Migration

The movement of newly formed neurons to their designated locations in the brain, facilitated by glial fibers that provide support and guidance.

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Differentiation

The growth of connections between neurons, forming synapses that allow impulses to pass between nerve cells through neurotransmitters.

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Pruning

The process of eliminating excess synapses and neurons formed during differentiation, occurring at a rapid rate until the end of puberty, leading to a reduction in the number of synapses in old age.

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What are the four stages of brain structural changes?

What are the four stages of brain structural changes?

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What are Glial Fibers?

Non-neuronal cells in the central nervous system that support and guide neurons during brain development

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At what rate does synaptic pruning occur?

100,000 synapses per second

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What are the effects of excessive pruning?

Linked to schizophrenia

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What are the effects of insufficient pruning?

Linked to autism spectrum disorders

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What does higher synaptic density in infants indicate?

Brain plasticity

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Does more synaptic connections mean better cognitive abilities?

No

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What was the focus of early brain studies?

Brain size

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What did early post-mortem studies reveal about brain size?

Increases until around 9-10 years

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What are the limitations of early post-mortem studies?

Could not observe dynamic brain changes

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What do MRI and PET scans help study?

Brain structure and function

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How do modern imaging techniques differ from early studies?

Provide real-time insights into brain activity

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Why is understanding brain structure important for psychological development?

Shows how brain changes affect behavior

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What role do experiences play in brain development?

Shape synaptic connections and cognitive abilities

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How does brain structure change throughout life?

Through synaptic pruning and new synapse formation

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What is the significance of the brain's plasticity early in life?

Allows adaptation and learning

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What does the term 'synaptic density' refer to?

Number of synaptic connections in the brain

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How does brain size relate to cognitive ability according to early studies?

No direct correlation

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What is the main focus of structural changes in brain development?

Integration of new neurons and synapses

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What structural changes occur in the brain during old age?

Continued synaptic pruning and cognitive shifts