Cov somatic efferent neurons nyob rau hauv cov ntu sacral uas innervate cov leeg urethralis ntawm lub pudendal paj yog inhibited. Kev yooj yim ntawm cov pudendal somatic neurons tiv thaiv kev tso zis.
Yuav ua li cas thaum lub sijhawm tso tseg?
Thaum micturition, tso zis yog pab los ntawm ntxiv detrusor contractions thiab sab nraud sphincter so uas txo qis tsis kam mus rau qhov tso zis. Lub plab phab ntsa thiab pelvic pem teb musculature kuj koom nrog los ntawm kev nce lub zog ntawm lub zais zis los pab ua kom tiav qhov khoob.
Pab dab tsi cuam tshuam nrog tso zis?
Cov zis qis yog innervated los ntawm 3 pawg ntawm peripheral qab haus huv: pelvic parasympathetic nerves, uas tshwm sim ntawm qib sacral ntawm tus txha caj qaum, ua kom lub zais zis, thiab so kom txaus. urethra; lumbar sympathetic qab haus huv, uas inhibit lub zais zis lub cev thiab excite lub zais zis puag thiab urethra; thiab pudendal paj, …
Pab twg ntawm cov hlab ntsha hauv qab no koom nrog kev tso zis reflex?
Lub zais zis caj dab lossis sab hauv sphincter yog innervated los ntawm hypogastric nerves, uas tau los ntawm T11–L2 (sympathetic). Sab nraud sphincter yog tib qho qauv hauv cov zis qis kom tau txais somatic innervation, thiab qhov no yog los ntawm ib ceg ntawm cov hlab ntsha perineal, thib ob ceg ntawm cov hlab ntsha pudendal.
Dab tsi lub paj hlwb tiv thaiv kev tso zis?
Thaum lub sympathetic nervous system ua haujlwm, kev tso zis tshwm sim thiab qhov micturition reflex raug txwv.
