Epineurial sutures are a comparably simple method of repair, but they do not ensure correct matching of fascicles. The development of microsurgical techniques has led many surgeons to adopt a perineurial suturing technique where an attempt is made to sew corresponding fascicles together. They are small rounded masses enclosed in a connective tissue capsule and containing neurons, supporting satellite cells and bundles of nerve fibres. There are two types - sensory ganglia that contain the cell bodies of sensory neurons and autonomic ganglia that contain the cell bodies of efferent neurons of the autonomic nervous system. Because of their dual association, they are often called craniospinal ganglia.
Ganglion cells have the typical features of neurons described above.
These have multipolar neurons that are surrounded by fewer satellite cells. The clustering of the cells is less obvious and most of the nerve fibres are small and non-myelinated.