Related MeSH Hierarchy (4)
Anatomy [A] » Nervous System [A08] » Neurons » Nerve Fibers » Axons » Axon Initial Segment
Anatomy [A] » Cells [A11] » Cellular Structures » Cell Surface Extensions » Axons » Axon Initial Segment
Anatomy [A] » Cells [A11] » Neurons » Nerve Fibers » Axons » Axon Initial Segment
Description
First segment of axon that connects distal axon segments to the neuronal CELL BODY at the axon hillock region. The axon initial segment is not protected by the MYELIN SHEATH and has properties critical for axonal growth. The axon initial segment and the axon hillock form an axonal trigger zone. MeSH
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