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Neuroplasticity Concepts
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Cortical Re-mapping
Cortical Re-mapping involves the reorganization of the cortical maps in the brain, which can occur in response to injury, disease, or as a result of learning new skills. Example: After a person loses a limb, the area of the brain that controlled that limb's movement may be reassigned to control other body parts.
Brain-Derived Neurotrophic Factor (BDNF)
BDNF is a protein that supports the survival of existing neurons and encourages the growth and differentiation of new neurons and synapses. Example: Exercise increases the levels of BDNF, which can positively influence brain function.
Cross-Modal Plasticity
Cross-Modal Plasticity is the reassignment of a function from a damaged sense to another sense. This allows the brain to compensate for impairment or loss of a sensory modality. Example: In blind individuals, parts of the brain that would normally process visual information can repurpose to enhance auditory processing.
Experience-Dependent Plasticity
Experience-Dependent Plasticity is the continuing process by which the neural connections are created and reorganized throughout life due to environmental interactions. Example: Learning a new language can lead to changes in the areas of the brain associated with linguistic processing.
Synaptic Plasticity
Synaptic Plasticity refers to the ability of synapses to strengthen or weaken over time in response to increases or decreases in their activity. Example: Long-term potentiation, where sustained stimulation of neurons leads to an increased synaptic strength.
Neurogenesis
Neurogenesis is the process of new neuron formation in the brain, which can occur in the adult brain and contribute to plasticity. Example: The hippocampus is known to generate new neurons throughout life which can play a role in learning and memory.
Long-Term Potentiation (LTP)
LTP is a long-lasting enhancement in signal transmission between two neurons that results from stimulating them synchronously. LTP is one of the primary cellular mechanisms behind learning and memory. Example: Memorizing information for an exam can induce LTP in relevant brain areas, reinforcing the memory trace.
Long-Term Depression (LTD)
LTD is the opposite of LTP, it is a long-lasting decrease in synaptic strength. It is believed to play a role in the removal of old memories and can have a role in motor learning. Example: LTD can be observed in the cerebellum during motor learning as some synaptic responses are diminished and refined.
Use-Dependent Plasticity
Use-Dependent Plasticity is a form of neuroplasticity that states that the more a particular brain function is used, the more it will strengthen and become more efficient. Example: Musicians often have more developed areas of the brain related to their instrument playing due to extensive practice.
Hebbian Learning
Hebbian Learning is a theory that proposes the mechanism of synaptic plasticity whereby an increase in synaptic efficacy arises from the presynaptic cell's repeated and persistent stimulation of the postsynaptic cell. Example: Learning a new skill, like playing the piano, strengthens the synapses involved in that task.
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