Male Pelvis and Genitalia: Autonomic Innervation Page 8 of 8
| The following illustration demonstrates the parasympathetic and sympathetic innervation of the male reproductive system. |
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What does the parasympathetic nervous system control in the male genitalia? |
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The parasympathetic nervous system (via the pelvic splanchnic nerves, S2–S4) is responsible for: Erection of the penis through vasodilation of the deep arteries of the corpora cavernosa Remember the mnemonic Point (Parasympathetic), Shoot (Sympathetic), and Score (Somatic). |
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What does the sympathetic nervous system contron in the the male genitalia? |
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Smooth muscle contration of the internal urethral sphincter in men Smooth muscle contraction of the accessory glands of the reproductive system and peristalsis of the ducts Helps to move secretions from the epididymis and associated glands into the prostatic urethra before ejaculation. |
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The above mnemonics (“Point, Shoot, Score”) offer a simplified overview. For a complete understanding of autonomic control, including neural pathways and integration with somatic innervation, refer to various texts for more detail.