Brain Circuit Remodeling
Brain Circuit Remodeling - Related Videos
11:13
Ex Vivo Optogenetic Dissection of Fear Circuits in Brain Slices
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Cited by 8 •
2016
Optogenetic approaches are widely used to manipulate neural activity and assess the consequences for brain function. Here, a technique is outlined that upon in vivo expression of the optical activator Channelrhodopsin, allows for ex vivo analysis of synaptic properties of specific long range and local neural connections in fear-related circuits.
13:36
Scalable Fluidic Injector Arrays for Viral Targeting of Intact 3-D Brain Circuits
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Cited by 10 •
2010
Controlling and analyzing neural circuits in vivo would be facilitated by a technology for delivery of viruses and other reagents to desired 3-dimensional sets of brain regions. We demonstrate customized fluidic injector array fabrication, and delivery of virally-encoded optical sensitizers, enabling optical manipulation of complex brain circuits.
02:54
Nucleosome Remodeling
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2020
Nucleosomes are the basic units of chromatin compaction. Each nucleosome consists of the DNA bound tightly around a histone core, which makes the DNA inaccessible to DNA binding proteins such as DNA polymerase and RNA polymerase. Hence, the fundamental problem is to ensure access to DNA when appropriate, despite the compact and protective chromatin structure. Nucleosome remodeling complex Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...
10:59
Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury
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Cited by 13 •
2012
A multi-faceted approach to investigating functional changes to hippocampal circuitry is explained. Electrophysiological techniques are described along with the injury protocol, behavioral testing and regional dissection method. The combination of these techniques can be applied in similar fashion for other brain regions and scientific questions.
09:27
RC/RL/LC Circuits
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2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN Capacitors (C), inductors (L), and resistors (R) are each an important circuit element with distinct behaviors. A resistor dissipates energy and obeys Ohm's law, with its voltage proportional to its current. A capacitor stores electrical energy, with its current proportional to the rate of change of its voltage, while an inductor stores magnetic energy, with its voltage...
FAQs
Repeated neural activity can change how effectively neurons communicate, producing synaptic plasticity. Depending on the activity pattern, a connection may become stronger or weaker rather than remaining fixed. These functional adjustments help neural networks refine their responses to experience, creating a cellular basis for changes in processing that can contribute to learning and memory.
Researchers can examine changes in dendritic spines, axons, and inhibitory circuits in addition to synaptic plasticity. These features represent complementary dimensions of remodeling: some changes affect connection strength, while others alter circuit structure or influence network function. Assessing them together gives a fuller account of how experience, development, or injury changes neural activity.
Experience, development, and injury can place neural networks in different remodeling contexts. Activity-dependent changes may refine sensory processing during experience, support learning and memory, or contribute to restoration after some neural damage. The outcome therefore depends not only on activity itself, but also on the biological situation in which network reorganization occurs.
Synaptic plasticity describes changes in communication strength, whereas alterations in dendritic spines, axons, and inhibitory circuits describe additional structural or circuit-level adjustments. Studying these dimensions together helps explain how neural networks change their function while also changing their organization. This integrated view connects cellular events with sensory processing, learning, memory, and recovery.
Changes in synaptic communication and related circuit features can modify how neural networks process activity. When these adjustments are driven by experience, they can support learning and memory rather than simply producing a temporary change in signaling. Research therefore uses circuit remodeling to connect activity-dependent cellular events with the behavioral capacities that emerge from them.
It provides a framework for research across neurodevelopment, rehabilitation, psychiatric disorders, and neurodegenerative disease. In neurodevelopment, investigators can examine how circuits are refined; in rehabilitation, they can consider restoration after damage. The same cellular and network principles also help organize research questions involving psychiatric disorders and neurodegenerative disease.
After some neural damage, coordinated changes in connections and circuit components may help restore function. Studying this process can connect cellular reorganization with rehabilitation questions, including how altered networks might support functional recovery. The findings are most relevant to cases in which remodeling contributes to restoration, rather than implying complete recovery after every injury.