Human Spinal Lumbosacral Nerves - Genital and Gastrointestinal

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This page is intended to list lumbo-sacral spinal cord nerves of biological human, which connect mind to human limbs and visceral organs.

Coverage verified by:

http://medical-dictionary.thefreedictionary.com/nerve (name base)
http://www.oluwoleogunranti.com/course/course1/nerves (MA reference)

LUMBOSACRAL NERVES - GENITAL AND GASTROINTESTINAL

(generated)

motor nuclei/ganglia*:
Inferior Mesenteric Ganglion,LAC.PN.SYM.IMG; NERVES={left hypogastric nerve, cervical; left hypogastric nerve, lubricate; left hypogastric nerve, prostatic; left hypogastric nerve, ureteric; left hypogastric nerve, uterovaginal; right hypogastric nerve; genitofemoral nerve, genital branch; scrotal nerve, posterior}
Onuf's Nucleus,LPC.SC.VH.ONF; NERVES={genitofemoral nerve, genital; dorsal nerve of clitoris/penis; perineal nerve, deep branch; inferior rectal nerve; nerve to superficial transverse perineal}
Pelvic Peripheral Ganglion,LAC.PN.PSYM.PPG; NERVES={splanchnic nerves, pelvic, nipple; splanchnic nerves, pelvic, to penis/clitoris; splanchnic nerves, pelvic, to rectum; splanchnic nerves, pelvic, to stomach; splanchnic nerves, pelvic, to urinary bladder; splanchnic nerves, pelvic, uterovaginal}
Ventromedial Nucleus,LPC.SC.VH.VM; NERVES={nerves to coccygeus and levator ani muscles}

sensory nuclei/ganglia*:
Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG; NERVES={left hypogastric nerve, cervical; left hypogastric nerve, lubricate; left hypogastric nerve, prostatic; left hypogastric nerve, ureteric; left hypogastric nerve, uterovaginal; right hypogastric nerve; splanchnic nerves, pelvic, to penis/clitoris; splanchnic nerves, pelvic, to rectum; splanchnic nerves, pelvic, to stomach; splanchnic nerves, pelvic, to urinary bladder; splanchnic nerves, pelvic, uterovaginal; Genitalia nerves, somatic; Rectum nerves, somatic}
Upper Dorsal Root Ganglion,LPC.PN.SG.UDRG; NERVES={splanchnic nerves, pelvic, nipple}

nerves*:
*Autonomic nerves*; MODALITY={sympathetic motor, parasympathetic motor, autonomic sensory}

* 
* *splanchnic nerves*; MODALITY={sympathetic motor, parasympathetic motor, autonomic sensory}
 * *splanchnic nerves, lumbar* (MA:[SPLANCHNIC NERVES]); ORIGIN={lumbar sympathetic trunk, L1-L3}; DISTRIBUTION={upper nerves ones go to intermesenteric and adjacent plexuses, and lower ones descend to superior hypogastric plexus; sensory - pregnancy and nociception to IML, adds to pelvic nerve}; MODALITY={sympathetic motor, autonomic sensory}
  * *left hypogastric nerve* (MA:[NERVE]); ORIGIN={Left hypogastric plexus (L1-L5)}; MODALITY={sympathetic motor, autonomic sensory}
   * *left hypogastric nerve, cervical*; DISTRIBUTION={female: produces cervical mucus that changes in consistency during the menstrual cycle to prevent or promote pregnancy}; MODALITY={sympathetic motor, autonomic sensory}; MUSCLES={[- cervix] - female - produces cervical mucus that changes in consistency during the menstrual cycle to prevent or promote pregnancy}; FIBERS={GVE:BrainRegionLAC_SC_IZ_IML Intermediolateral Nucleus,LAC.SC.IZ.IML -> BrainRegionLAC_PN_SYM_IMG Inferior Mesenteric Ganglion,LAC.PN.SYM.IMG -> BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA; GVA:BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_IZ_IMM Intermediomedial Nucleus,LPC.SC.IZ.IMM}
    * 
   * *left hypogastric nerve, lubricate*; DISTRIBUTION={greater vestibular (Bartholin) glands in females and the bulbourethral (Cowper) glands in males}; MODALITY={sympathetic motor, autonomic sensory}; MUSCLES={[- bartholin gland] - secretes mucus to lubricate the vagina; [Genitalia - cowper gland] - produces a clear, salty, viscous secretion known as pre-ejaculate, homologous to Bartholin glands in females; [Genitalia - prostate gland] - secrete a slightly alkaline fluid, milky or white in appearance, constitutes 50-75 percents of the volume of the semen along with spermatozoa and seminal vesicle fluid; [Genitalia - skenes gland] - cause female ejaculation and G-Spot orgasms}; FIBERS={GVE:BrainRegionLAC_SC_IZ_IML Intermediolateral Nucleus,LAC.SC.IZ.IML -> BrainRegionLAC_PN_SYM_IMG Inferior Mesenteric Ganglion,LAC.PN.SYM.IMG -> BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA; GVA:BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_IZ_IMM Intermediomedial Nucleus,LPC.SC.IZ.IMM}
    * 
   * *left hypogastric nerve, prostatic*; DISTRIBUTION={male: emission is the result of peristaltic contractions of the ampullary portion of the vas deferens, the seminal vesicles, and the prostatic smooth muscles}; MODALITY={sympathetic motor, autonomic sensory}; MUSCLES={[- vas deferens] - male - emission (prior to ejaculation), contracts, propelling sperm forward}; FIBERS={GVE:BrainRegionLAC_SC_IZ_IML Intermediolateral Nucleus,LAC.SC.IZ.IML -> BrainRegionLAC_PN_SYM_IMG Inferior Mesenteric Ganglion,LAC.PN.SYM.IMG -> BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA; GVA:BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_IZ_IMM Intermediomedial Nucleus,LPC.SC.IZ.IMM}
    * 
   * *left hypogastric nerve, ureteric* (MA:[PLEXUS]; MA:[UTERINE NERVES]); DISTRIBUTION={ureteric smooth muscles}; MODALITY={sympathetic motor, autonomic sensory}; MUSCLES={[Ureter - detrusor urinae muscle, sympathetic] - sympathetic relaxes, to store urine; [Ureter - internal sphincter muscle of urethra, sympathetic] - sympathetic contracts the muscle}; FIBERS={GVE:BrainRegionLAC_SC_IZ_IML Intermediolateral Nucleus,LAC.SC.IZ.IML -> BrainRegionLAC_PN_SYM_IMG Inferior Mesenteric Ganglion,LAC.PN.SYM.IMG -> BrainRegionTARGET_TEA_URETER Ureter,TARGET.TEA.URETER; GVA:BrainRegionTARGET_TEA_URETER Ureter,TARGET.TEA.URETER -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_IZ_IMM Intermediomedial Nucleus,LPC.SC.IZ.IMM}
    * 
   * *left hypogastric nerve, uterovaginal* (MA:[PLEXUS]; Plexus of Frankenhauser); DISTRIBUTION={walls of the vagina, uterus}; MODALITY={sympathetic motor, autonomic sensory}; MUSCLES={[Genitalia - uterus, sympathetic contractors] - female - contraction of smooth muscles of myometrium, decreased blood flow, loss of erection; [Genitalia - vagina, sympathetic vasoconstrictors] - female - vasoconstriction of fibromuscular tube, loss of erection}; FIBERS={GVE:BrainRegionLAC_SC_IZ_IML Intermediolateral Nucleus,LAC.SC.IZ.IML -> BrainRegionLAC_PN_SYM_IMG Inferior Mesenteric Ganglion,LAC.PN.SYM.IMG -> BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA; GVA:BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_IZ_IMM Intermediomedial Nucleus,LPC.SC.IZ.IMM}
    * 
  * *right hypogastric nerve* (MA:[NERVE]); ORIGIN={Right hypogastric plexus (L1-L5)}; DISTRIBUTION={smooth internal anal sphincter muscle}; MODALITY={sympathetic motor, autonomic sensory}; MUSCLES={[Rectum - sphincter ani internus muscle, sympathetic] - stimulate and maintain internal anal sphincter contraction}; FIBERS={GVE:BrainRegionLAC_SC_IZ_IML Intermediolateral Nucleus,LAC.SC.IZ.IML -> BrainRegionLAC_PN_SYM_IMG Inferior Mesenteric Ganglion,LAC.PN.SYM.IMG -> BrainRegionTARGET_TEA_RECTUM Rectum,TARGET.TEA.RECTUM; GVA:BrainRegionTARGET_TEA_RECTUM Rectum,TARGET.TEA.RECTUM -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_IZ_IMM Intermediomedial Nucleus,LPC.SC.IZ.IMM}
   * 
 * *splanchnic nerves, pelvic* (MA:[SPLANCHNIC NERVES]); ORIGIN={sacral PLEXUS S2-S4}; BRANCHES={to penis/clitoris/vagina, to other pelvic structures (urinary bladder, rectum, anus, sigmoid and descending colon, terminal transverse colon, uterus and uterine tubes)}; DISTRIBUTION={leaving sacral plexus, they enter inferior hypogastric plexus and supply pelvic organs; mating and conception}; MODALITY={parasympathetic motor, autonomic sensory}
  * *splanchnic nerves, pelvic, nipple*; DISTRIBUTION={breast, smooth muscles of the nipple}; MODALITY={parasympathetic motor, autonomic sensory}; MUSCLES={[- nipple smooth muscles] - female - erection of nipples due to contraction of smooth muscle}; FIBERS={GVE:BrainRegionLAC_SC_IZ_SPS Sacral Parasympathetic Nucleus,LAC.SC.IZ.SPS -> BrainRegionLAC_PN_PSYM_PPG Pelvic Peripheral Ganglion,LAC.PN.PSYM.PPG -> BrainRegionTARGET_TEA_BREAST Breast,TARGET.TEA.BREAST; GVA:BrainRegionTARGET_TEA_BREAST Breast,TARGET.TEA.BREAST -> BrainRegionLPC_PN_SG_UDRG Upper Dorsal Root Ganglion,LPC.PN.SG.UDRG -> BrainRegionLPC_SC_IZ_IMM Intermediomedial Nucleus,LPC.SC.IZ.IMM}
   * 
  * *splanchnic nerves, pelvic, to penis/clitoris*; MODALITY={parasympathetic motor, autonomic sensory}; FIBERS={GVE:Sacral Parasympathetic Nucleus,LAC.SC.IZ.SPS -> BrainRegionLAC_PN_PSYM_PPG Pelvic Peripheral Ganglion,LAC.PN.PSYM.PPG -> BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA; GVA:BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_IZ_IMM Intermediomedial Nucleus,LPC.SC.IZ.IMM}
   * *cavernous nerves of clitoris*; ORIGIN={uterovaginal PLEXUS, pelvic splanchnic nerve}; DISTRIBUTION={erectile tissue of clitoris}; MODALITY={parasympathetic motor, autonomic sensory}; MUSCLES={[- corpus cavernosum clitoridis] - clitoral erection; simultaneously the ischiocavernosus and bulbospongiosus muscles compress the veins of the corpora cavernosa restricting the egress and circulation of this blood}
    * 
   * *cavernous nerves of penis*; ORIGIN={prostatic PLEXUS, pelvic splanchnic nerve}; DISTRIBUTION={erectile tissue of penis}; MODALITY={parasympathetic motor, autonomic sensory}; MUSCLES={[- corpus cavernosum penis] - penile erection; simultaneously the ischiocavernosus and bulbospongiosus muscles compress the veins of the corpora cavernosa restricting the egress and circulation of this blood}
    * 
  * *splanchnic nerves, pelvic, to rectum*; ORIGIN={mesenteric plexus, inferior}; DISTRIBUTION={rectum, anus}; MODALITY={parasympathetic motor, autonomic sensory}; MUSCLES={[- sphincter ani internus muscle, parasympathetic] - keep the anal canal and anus closed, aids in the expulsion of the feces, inhibit contraction}; FIBERS={GVE:BrainRegionLAC_SC_IZ_SPS Sacral Parasympathetic Nucleus,LAC.SC.IZ.SPS -> BrainRegionLAC_PN_PSYM_PPG Pelvic Peripheral Ganglion,LAC.PN.PSYM.PPG -> BrainRegionTARGET_TEA_RECTUM Rectum,TARGET.TEA.RECTUM; GVA:BrainRegionTARGET_TEA_RECTUM Rectum,TARGET.TEA.RECTUM -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_IZ_IMM Intermediomedial Nucleus,LPC.SC.IZ.IMM}
   * 
  * *splanchnic nerves, pelvic, to stomach*; ORIGIN={Auerbach's plexus, Meissner's plexus}; DISTRIBUTION={terminal transverse colon, descending colon, sigmoid colon}; MODALITY={parasympathetic motor, autonomic sensory}; MUSCLES={[- mucosal gastric glands] - acetylcholine activates muscarinic receptors cause an increase in gastric juice secretion; [Stomach - outer longitudinal and inner circular smooth muscles] - keep the mucosal surface and underlying glands in a constant state of gentle agitation to expel contents of glandular crypts and enhance contact between epithelium and the contents of the lumen}; FIBERS={GVE:BrainRegionLAC_SC_IZ_SPS Sacral Parasympathetic Nucleus,LAC.SC.IZ.SPS -> BrainRegionLAC_PN_PSYM_PPG Pelvic Peripheral Ganglion,LAC.PN.PSYM.PPG -> BrainRegionTARGET_TEA_STOMACH Stomach,TARGET.TEA.STOMACH; GVA:BrainRegionTARGET_TEA_STOMACH Stomach,TARGET.TEA.STOMACH -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_IZ_IMM Intermediomedial Nucleus,LPC.SC.IZ.IMM}
   * 
  * *splanchnic nerves, pelvic, to urinary bladder*; ORIGIN={hypogastric plexus}; DISTRIBUTION={urinary bladder, uterus and uterine tubes; preganglionic axons exit from the ventral roots, travel in the pelvic nerves, pass through the hypogastric plexus, and synapse on postganglionic neurons located in the wall of the urinary bladder}; MODALITY={parasympathetic motor, autonomic sensory}; MUSCLES={[- detrusor urinae muscle, parasympathetic] - parasympathetic contracts, to urinate; [Ureter - internal sphincter muscle of urethra, parasympathetic] - parasympathetic relaxes the muscle}; FIBERS={GVE:BrainRegionLAC_SC_IZ_SPS Sacral Parasympathetic Nucleus,LAC.SC.IZ.SPS -> BrainRegionLAC_PN_PSYM_PPG Pelvic Peripheral Ganglion,LAC.PN.PSYM.PPG -> BrainRegionTARGET_TEA_URETER Ureter,TARGET.TEA.URETER; GVA:BrainRegionTARGET_TEA_URETER Ureter,TARGET.TEA.URETER -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_IZ_IMM Intermediomedial Nucleus,LPC.SC.IZ.IMM}
   * 
  * *splanchnic nerves, pelvic, uterovaginal*; ORIGIN={uterovaginal plexus}; DISTRIBUTION={uterus, vagina}; MODALITY={parasympathetic motor, autonomic sensory}; MUSCLES={[- parasympathetic uterus vasodilators] - female - contraction of smooth muscles of myometrium, increased blood flow; [Genitalia - parasympathetic vaginal vasodilators] - female - contraction of smooth muscles of myometrium, increased blood flow}; FIBERS={GVE:BrainRegionLAC_SC_IZ_SPS Sacral Parasympathetic Nucleus,LAC.SC.IZ.SPS -> BrainRegionLAC_PN_PSYM_PPG Pelvic Peripheral Ganglion,LAC.PN.PSYM.PPG -> BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA; GVA:BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_IZ_IMM Intermediomedial Nucleus,LPC.SC.IZ.IMM}
   *

*Genitalia nerves, somatic*; MODALITY={general sensory, flexor motor, sympathetic motor}; FIBERS={GSA:Genitalia,TARGET.TEA.GENITALIA -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_PH_LMG Lower Marginal Nucleus,LPC.SC.PH.LMG; GSA:BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_PH_LSG Lower Substantia Gelatinosa,LPC.SC.PH.LSG}

* *genitofemoral nerve, genital* (MA:[NERVE]); ORIGIN={lumbar PLEXUS (L1-L2)}; BRANCHES={genital}; DISTRIBUTION={cremaster muscle, skin of scrotum or labium majus}; MODALITY={general sensory, flexor motor, sympathetic motor}; FIBERS={GSE:BrainRegionLPC_SC_VH_ONF Onuf's Nucleus,LPC.SC.VH.ONF -> BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA}
 * *genitofemoral nerve, genital branch* (MA:[BRANCH OF GENITOFEMORAL NERVE]); ORIGIN={genitofemoral nerve (L1-L2)}; DISTRIBUTION={muscular branches to cremaster muscle (male only, raise and lower testes in order to regulate temperature of testes and promote spermatogenesis); cutaneous branches to skin of scrotum/male and labium majus/female, mons pubis/female}; MODALITY={general sensory, flexor motor, sympathetic motor}; MUSCLES={[Genitalia - cremaster muscle] - raise and lower the scrotum, acts quickly, it is a reflex}; FIBERS={GVE:BrainRegionLAC_SC_IZ_IML Intermediolateral Nucleus,LAC.SC.IZ.IML -> BrainRegionLAC_PN_SYM_IMG Inferior Mesenteric Ganglion,LAC.PN.SYM.IMG -> BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA}
  * 
* *iliohypogastric nerve* (MA:[NERVE]); ORIGIN={lumbar PLEXUS L1 (sometimes T12)}; BRANCHES={lateral and anterior cutaneous branches}; DISTRIBUTION={skin above the pubis and over the lateral side of the buttock, and occasionally the pyramidal muscle}; MODALITY={general sensory}
 * 
* *ilioinguinal nerve* (MA:[NERVE]); ORIGIN={lumbar PLEXUS L1 (sometimes T12); accompanies the spermatic cord through the inguinal canal}; BRANCHES={anterior scrotal or labial branches}; DISTRIBUTION={skin of scrotum or labia majora, and adjacent part of thigh}; MODALITY={general sensory}
 * *labial nerves, anterior*; ORIGIN={female, ilioinguinal nerve}; DISTRIBUTION={skin of anterior labial region of labia majora, and adjacent part of thigh}; MODALITY={general sensory}
  * 
 * *scrotal nerves, anterior*; ORIGIN={male, ilioinguinal nerve}; DISTRIBUTION={skin of anterior scrotal region}; MODALITY={general sensory}
  * 
* *pudendal nerve, genitalia* (MA:[NERVE]); ORIGIN={sacral PLEXUS (S2-S4)}; BRANCHES={enters pudendal canal, gives off inferior anal nerve, and then divides into perineal nerve and dorsal nerve of penis (clitoris)}; DISTRIBUTION={muscles, skin, and erectile tissue of perineum}; MODALITY={general sensory, flexor motor, sympathetic motor}
 * *dorsal nerve of clitoris/penis*; DISTRIBUTION={deep transverse muscle of perineum, sphincter muscle of urethra, corpus cavernosum of clitoris, and skin, prepuce, and glans of clitoris}; MODALITY={general sensory, flexor motor}; FIBERS={GSE:Onuf's Nucleus,LPC.SC.VH.ONF -> BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA}
  * *dorsal nerve of clitoris* (MA:[NERVE OF PENIS OR CLITORIS]); ORIGIN={pudendal nerve}; MODALITY={general sensory, flexor motor}; MUSCLES={[Genitalia - deep transverse perineal muscle, clitoris] - fixation of central tendon of perineum, support of pelvic floor, expulsion of semen in males and last drops of urine in both sexes}
   * 
  * *dorsal nerve of penis* (MA:[NERVE OF PENIS OR CLITORIS]); ORIGIN={pudendal nerve}; MODALITY={general sensory, flexor motor}; MUSCLES={[Genitalia - deep transverse perineal muscle, penis] - fixation of central tendon of perineum, support of pelvic floor, expulsion of semen in males and last drops of urine in both sexes}
   * 
 * *nerve to urethral bulb* (MA:[TO URETHRAL BULB]); ORIGIN={Pudendal nerve/nerve to bulbospongiosus}; BRANCHES={mucosal and cutaneous/visceral}; DISTRIBUTION={male/bulb of penis, female/clitoral bulbs - erectile tissue}; MODALITY={general sensory}
  * 
 * *perineal nerve, genitalia* (MA:[BRANCH OF S4]; MA:[PERINEAL NERVE]); ORIGIN={pudendal nerve}; BRANCHES={muscular branches and posterior scrotal or labial nerves}; DISTRIBUTION={muscular branches supply bulbocavernous, ischiocavernous, bulb of the penis; scrotal (labial) nerves supply scrotum or labium majus}; MODALITY={general sensory, flexor motor, sympathetic motor}
  * *perineal nerve, deep branch* (MA:[LABIAL NERVES]); ORIGIN={pudendal nerve}; DISTRIBUTION={muscles of the perineum - bulbospongiosus, ischiocavernosus, sphincter urethrae}; MODALITY={general sensory, flexor motor}; MUSCLES={[Genitalia - bulbospongiosus muscle] - in males, empties the urethra; in females, clenches the vagina; [Genitalia - ischiocavernosus muscle] - stabilize the erect penis or (in females) tense the vagina during orgasm; [Ureter - external sphincter muscle of female urethra] - control urination, constricts urethra, maintain urinary continence; [Ureter - external sphincter muscle of male urethra] - control urination, constricts urethra, maintain urinary continence}; FIBERS={GSE:BrainRegionLPC_SC_VH_ONF Onuf's Nucleus,LPC.SC.VH.ONF -> BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA}
   * 
  * *perineal nerve, superficial branch*; MODALITY={general sensory, sympathetic motor}
   * *labial nerve, posterior* (MA:[LABIAL NERVES]); ORIGIN={pudendal nerve}; DISTRIBUTION={labium majus}; MODALITY={general sensory}
    * 
   * *scrotal nerve, posterior* (MA:[SCROTAL NERVES]); ORIGIN={pudendal nerve}; DISTRIBUTION={skin of scrotum}; MODALITY={general sensory, sympathetic motor}; MUSCLES={[Genitalia - dartos muscle] - corrugates the scrotum; contraction reduces the surface area available for heat loss, thus reducing heat loss and warming the testicles; expansion increases the surface area, promoting heat loss and thus cooling the testicles.}; FIBERS={GVE:BrainRegionLAC_SC_IZ_IML Intermediolateral Nucleus,LAC.SC.IZ.IML -> BrainRegionLAC_PN_SYM_IMG Inferior Mesenteric Ganglion,LAC.PN.SYM.IMG -> BrainRegionTARGET_TEA_GENITALIA Genitalia,TARGET.TEA.GENITALIA}
    *

*Rectum nerves, somatic*; MODALITY={general sensory, flexor motor, extensor motor}; FIBERS={GSA:Rectum,TARGET.TEA.RECTUM -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_PH_LMG Lower Marginal Nucleus,LPC.SC.PH.LMG; GSA:BrainRegionTARGET_TEA_RECTUM Rectum,TARGET.TEA.RECTUM -> BrainRegionLPC_PN_SG_LDRG Lower Dorsal Root Ganglion,LPC.PN.SG.LDRG -> BrainRegionLPC_SC_PH_LSG Lower Substantia Gelatinosa,LPC.SC.PH.LSG}

* *pudendal nerve, rectum* (MA:[NERVE]); ORIGIN={sacral PLEXUS (S2-S4)}; BRANCHES={enters pudendal canal, gives off inferior anal nerve, and then divides into perineal nerve and dorsal nerve of penis (clitoris)}; DISTRIBUTION={muscles, skin, and erectile tissue of perineum}; MODALITY={general sensory, flexor motor, extensor motor}
 * *inferior rectal nerve* (MA:[RECTAL NERVE]; anal nerves, inferior; rectal nerves, inferior hemorrhoidal nerves); ORIGIN={pudendal nerve, or independently from sacral PLEXUS, S5}; BRANCHES={cutaneous branches mainly, but muscular branches to external anal sphincter}; DISTRIBUTION={supplying perianal skin and lower part of anal canal; external anal sphincter muscle, skin around anus, and lining of anal canal up to pectinate line}; MODALITY={general sensory, flexor motor}; MUSCLES={[Rectum - corrugator cutis ani muscle] - raises the skin into ridges around the margin of the anus; [Rectum - sphincter ani externus muscle] - keep the anal canal and anus closed, aids in the expulsion of the feces}; FIBERS={GSE:BrainRegionLPC_SC_VH_ONF Onuf's Nucleus,LPC.SC.VH.ONF -> BrainRegionTARGET_TEA_RECTUM Rectum,TARGET.TEA.RECTUM}
  * 
 * *perineal nerve, rectum* (MA:[BRANCH OF S4]; MA:[PERINEAL NERVE]); ORIGIN={pudendal nerve, S4}; BRANCHES={muscular branches and posterior scrotal or labial nerves}; DISTRIBUTION={muscular branches supply superficial transverse perineal muscles and levator ani muscles}; MODALITY={general sensory, flexor motor, extensor motor}
  * *nerve to superficial transverse perineal*; DISTRIBUTION={pelvic surface of levator ani}; MODALITY={general sensory, flexor motor}; MUSCLES={[- superficial transverse perineal muscle] - Fixation of central tendon of perineum, support of pelvic floor}; FIBERS={GSE:BrainRegionLPC_SC_VH_ONF Onuf's Nucleus,LPC.SC.VH.ONF -> BrainRegionTARGET_TEA_RECTUM Rectum,TARGET.TEA.RECTUM}
   * 
  * *nerves to coccygeus and levator ani muscles* (MA:[TO LEVATOR ANI]); DISTRIBUTION={motor innervation to coccygeus and levator ani muscles}; MODALITY={general sensory, extensor motor}; MUSCLES={[Genitalia - pubococcygeus muscle] - controls urine flow and contracts during orgasm; [Rectum - coccygeus muscle] - pulls coccyx forward after defecation, closing in the back part of the outlet of the pelvis; [Rectum - iliococcygeus muscle] - supports the viscera in pelvic cavity; [Rectum - puborectalis muscle] - inhibit defecation}; FIBERS={GSE:BrainRegionLPC_SC_VH_VM Ventromedial Nucleus,LPC.SC.VH.VM -> BrainRegionTARGET_TEA_RECTUM Rectum,TARGET.TEA.RECTUM}
   *

HumanNervesSpinalGenital

LUMBOSACRAL NERVES - GENITAL AND GASTROINTESTINAL

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