Fig 6. Common synaptic innervations types found in the supraoptic nucleus.

(A) Axo-somatic active synapses (arrowheads) were in contact with magnocellular neurones in an active functional stage, according to the cytoplasmic subcellular appearance, especially the dilated rough reticulum endoplasmic. (B) Axo-axonic synapse (arrowhead) (asterisk represents an magnocellular neurone axon). (C) Axo-dendritic synapse (arrowhead) (square magnified in the right) (asterisks represent a dendrite from a magnocellular neurone). (D) In the dendritic zone, multiple axo-dendritic synapses (arrowheads) (asterisk represents a dendrite from a magnocellular neurone) are seen. Note the dilation stage of rough reticulum endoplasmic reticulum (RER).