Corpus: Cavernous nerves of penis
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1. Definition
The nervi cavernosi penis refers to the autonomic nerve fibres that innervate the corpus caverosum of the penis.
2. Anatomy
These fibres consist of both sympathetic and parasympathetic components, originating from spinal cord segments Th11 to L3 (sympathetic) and S2 to S4 (parasympathetic). They travel through the superior and inferior hypogastric plexuses and then continue into the pelvic plexus, eventually reaching the prostatic plexus. From there, they form the cavernous nerves, which enter the erectile tissue of the penis near the tip of the prostate.
3. Function
The sympathetic fibres promote vasoconstriction and are involved in ejaculation, while the parasympathetic fibres facilitate vasodilation, leading to penile erection.
4. Literature
- Anderhuber et al, Waldeyer - Human Anatomy: Lehrbuch und Atlas in einem Band (De Gruyter Studium) (19th totaly rev. ed.), De Gruyter, 2012
- Schünke et al. Prometheus. 4th edition, Thieme-Verlag, 2015