The changes in the activity of pudendal motoneurons in relation to reflex micturition evoked in decerebrate cats.
Reflex micturition was evoked in both non-immobilized (n = 5) and immobilized (n = 5) decerebrate cats by filling the bladder with physiological saline. Intracellular recordings were made from pudendal motoneurons (PU-MNs; n = 14) throughout the periods of before, during and after reflex micturition. The changes in the activity of PU-MNs were correlated with those in the intravesical pressure. Our results support the proposition that coordination of the sphincters and the detrusors is established by a gating mechanism, which is activated by the supraspinal source such as the pontine micturition center.
Shimoda
N
N
Department of Physiology, Asahikawa Medical College, Japan.
Takakusaki
K
K
Nishizawa
O
O
Tsuchida
S
S
Mori
S
S
D000818:Animals; D002415:Cats; D003655:Decerebrate State / Q000503:physiopathology*; D005260:Female; D007103:Immobilization; D008297:Male; D009046:Motor Neurons / Q000502:physiology*; D012018:Reflex / Q000502:physiology*; D014521:Urethra / Q000294:innervation / Q000502:physiology; D001743:Urinary Bladder / Q000294:innervation* / Q000502:physiology; D014554:Urination / Q000502:physiology