Atlas of Ultrastructural Neurocytology
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1.5. Axon

Fig. 1.5.4. Axon terminal emerging from the myelinated portion (M) and forming a presynaptic bouton (B). Preterminal myelin loops filled with the oligodendroglial cytoplasm are apparent and dense septations are formed between the loops and axonal plasma membranes (blue arrow). P - the perikaryon of a pyramidal cell, red arrow - coated endocytotic vesicle in a dendritic spine. Scale = 400 nm. (Mouse, neocortex.)

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