The lumbar ventral spinal roots, one of which is used in this procedure as donor, are mixed nerves with predominant somatic and some autonomic (sympathetic and parasympathetic) outflow.
The sacral ventral spinal roots, one of which is used in this procedure as recipient, are also mixed nerves with somatic and autonomic outflow.
骶神经前根也是躯体神经和自主神经混合传出神经，其中一条在本手术中用作受体。
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In addition, somatic motor nerves traveling through the pelvic plexus provide additional innervation to the pelvic floor musculature (Zvara et al, 1994).