presynaptic neuron

presynaptic neuron

a neuron from the axon terminal of which an electrical impulse is transmitted across a synaptic cleft to the cell body or one or more dendrites of a postsynaptic neuron by the release of a chemical neurotransmitter.
References in periodicals archive ?
If you don't have a reservoir of neurotransmitters, the drugs soon may become ineffective or tachyphylactic and cause a greater excretion of neurotransmitters via monoamine oxidase and catechol-O-methyltransferase, creating a deficiency of neurotransmitters in the presynaptic neuron.
When a voltage change, the so-called action potential, reaches the synaptic terminal in the presynaptic neuron, calcium flows through voltage-gated calcium channels into the presynaptic neuron.
1993), "cellular research has shown that the introduction of dopamine into synapses immediately after a postsynaptic neuron has been activated by a presynaptic neuron produces long-lasting changes in synaptic efficacies.
Increased calcium within the presynaptic neuron can lead to increased glutamate release into the synapse and increased postsynaptic neuronal calcium can increase the NMDA signal transduction.
Group II and Group III mG1uRs also are present on the axon terminal of the presynaptic neuron.
In the glial cells, glutamate is converted to glutamine by the enzyme glutamine synthetase and returned to the presynaptic neuron where glutaminase converts glutamine back to glutamate (Laake, Slyngstad, Haug, & Ottersen, 1995).
For LTP to occur, a presynaptic neuron must release the chemical glutamate in a continuous manner.
The vesicle then binds to the terminal end of the presynaptic neuron and releases these chemicals into the synapse.
The neuron that releases the chemical is called the presynaptic neuron.
Cl dependent monoamine transporter found on the presynaptic neuron and is responsible for the uptake of the neurotransmitter, dopamine, after nerve cell stimulation.
Calcium enters the cells causing the release of neurotransmitters from the presynaptic neuron (notably glutamate).
Presynaptic and postsynaptic neurons communications are as follows the presynaptic neuron, whose axon is primed for releasing neurotransmitters.