Granule cells
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Source: https://www.youtube.com/watch?v=—55azjOtdQ
What are Granule Cells?
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Granule cells are a type of Neuron cell found in the brain. They are particularly abundant in the Cerebellum, where they play a crucial role in motor coordination and cognitive functions. Granule cells are characterized by their small size and dense packing. They receive inputs from the mossy fibers and send outputs to the Purkinje cells through their parallel fibers. These neurons are essential for the processing of sensory information and the fine-tuning of motor activity.
Within the Hippocampus
Granule cells are a type of neuron found within the dentate gyrus of the hippocampus. They are characterized by their small size and densely packed arrangement, which gives the dentate gyrus its granular appearance. Granule cells play a crucial role in the processing of information within the hippocampus, particularly in the formation of new memories and spatial navigation.
These cells receive inputs from the entorhinal cortex through the perforant path and project their axons, known as mossy fibers, to the CA3 region of the hippocampus. This connection forms a critical part of the hippocampal trisynaptic circuit, which is essential for the consolidation of information from short-term to long-term memory.
Granule cells are notable for their involvement in neurogenesis, the process of generating new neurons. The dentate gyrus is one of the few areas in the adult brain where neurogenesis occurs throughout life, contributing to the plasticity of the hippocampus and its ability to adapt to new information.
Functionally, granule cells are involved in pattern separation, which is the ability to distinguish between similar inputs to create distinct memories. This function is critical for reducing interference between similar memories and is essential for precise memory recall.
In summary, granule cells are key neurons in the dentate gyrus of the hippocampus, crucial for memory formation, spatial navigation, and neurogenesis, playing a significant role in pattern separation and the hippocampal trisynaptic circuit.
see also
Tags: neurobiology science
Superlink: 051 ☣Neurobiology 050 🧠Neuroscience
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Created: 14-10-24 16:22