Glossary of symbols used throughout the text.

Values marked with an asterisk were estimated by Konzack et al. [34] in cultured rodent neurons. Ant. = anterograde, ret. = retrograde, conc. = concentration, vel. = velocity.带有星号标记的数值由Konzack等人[34]在培养啮齿类神经元中估算得到。其中，Ant. 为顺向（anterograde）的缩写，ret. 为逆向（retrograde）的缩写，conc. 为浓度（concentration）的缩写，vel. 为速率（velocity）的缩写。