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
Presynaptic and postsynaptic neurons communications are as follows the presynaptic neuron
, whose axon is primed for releasing neurotransmitters.