SYNAPSE ILLUSTRATION
Illustration of the transmission of information before and with long-term potentiation. The two synapses on the left show how the signal is transmitted from one neuron to another before LTP (long-term potentiation). The electrical signal arrives at the synapse, triggering the opening of vesicles containing neurotransmitters (yellow) released into the intersynaptic space. There are few ion channels (green) at the surface of the post-synaptic neuron, which limits the entrance of sodium ions (blue) in the channels that are open due to neurotransmitters. The signal is therefore weak and transmitted at a slow pace. On the right, two close-ups show what happens during a long-term potentiation nervous signal transmission. The activation of neurons is more efficient, the number of neurotransmitters in the ion channels is higher. A larger number of sodium ions enter the postsynaptic neuron, increasing the speed and intensity of the electrical signal transmission. This also allows the passage of calcium ions (red), increasing the intensity of the signal. Memory is instantly revived.
Size: 7198px × 5395px
Location: France
Photo credit: © JACOPIN / BSIP / Alamy / Afripics
License: Licensed
Model Released: No
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