In horse racing, these definitions may differ: For example, in the British Isles, Thoroughbred horse racing defines colts and fillies as less than five years old. However, Australian Thoroughbred racing defines colts and fillies as less than four years old.
For the general concept of brain plasticity, see neuroplasticity. In neuroscience, synaptic plasticity is the ability of synapses to strengthen or weaken over time, in response to increases or decreases in their activity. Plastic change also results from the alteration of the number of neurotransmitter receptors located on a synapse.
See also neuron. adrenergic synapse. the neurotransmitter is norepinephrine. See also adrenergic (1). axoaxonic synapse. see axoaxonic. axodendritic synapse. see axodentritic. axodendrosomatic synapse. one between the axon of one neuron and the dendrites and body of another.axosomatic synapse. see axosomatic.xodendrosomatic synapse one between the axon of one neuron and the dendrites and body of another. axosomatic synapse one between the axon of one neuron and the body of another. dendrodendritic synapse one from a dendrite of one cell to a dendrite of another.