The superficial laminae of the spinal dorsal horn, especially lamina II which is composed mainly of small interneurons, receive primary afferent C fibers which transmit peripheral noxious information, and descending projection fibers from central endogenous antinociceptive system.

脊髓背角淺層，尤其是Ⅱ?qū)邮墙邮軣o髓和薄髓初級傳入纖維傳遞的外周傷害性信息及來自中樞內(nèi)源性痛抑制系統(tǒng)投射纖維傳遞的痛抑制信息的主要部位，膠狀質(zhì)主要由局部環(huán)路神經(jīng)元構(gòu)成。

Barrington's nucleus that located in the pontine dorsolateral tegmentum is an important site for controlling voiding in the mammalian brain and is often referred to as pontine micturition center. Barrington's nucleus sends direct projection fibers to the sacral parasympathetic nucleus in which parasympathetic preganglionic neurons innervating detrusor muscles of the bladder are distributed. Electron or chemical stimulation of Barrington's nucleus clicits bladder contraction and increases discharges of bladder postganglionic nerve. Conversely, lesion of the nucleus results in a permanent inability to empty the bladder. On the other hand, an area located just ventral to Barrington's nucleu has been reported to send projection fibers to the ventrolateral group of Onuf's nucleus in the caudal lumbar cord segments; the vetrolateral group of Onuf's nucleus is mainly composed of pudendal motor neurons innervating the external urethral sphincter muscle.

Barrington's核發(fā)出纖維投射至支配膀胱逼尿肌的骶髓副交感核AAA级草久影院，毀損該區(qū)可導(dǎo)致動(dòng)物永久性失去排空膀胱的能力；而電刺激或化學(xué)刺激該區(qū)可引起支配膀胱的節(jié)后纖維放電增加和膀胱逼尿肌收縮亚洲黄色第一区。D區(qū)是緊鄰Barrington's核腹側(cè)的一團(tuán)神經(jīng)元加勒比婷婷色综合久久，它發(fā)出纖維投射至腰骶髓Ounf核的腹外側(cè)群，而Ounf核的腹外側(cè)群主要是由支配尿道外括約肌的陰部神經(jīng)運(yùn)動(dòng)神經(jīng)元組成aiai视频在线观看。

In summary, the present study revealed that Barrington's nucleus and D-region received direct projection fibers from the sacral spinal neurons in lamina I, parasympathetic nucleus and dorsal commissural nucleus; periaqueductal gray also received afferent projections from the lumbosacral spinal cord and sent projection fibers to the Barrington's nucleus and D-region.

上述結(jié)果說明：大鼠腰骶髓 I 層操碰在线、骶髓副交感核和后連合核神經(jīng)元發(fā)出的投射纖維直接終止于 Barrington's 核和 D 區(qū)內(nèi)；導(dǎo)水管周圍灰質(zhì)也接受來自腰骶髓的投射纖維www,jizzcom，同時(shí)發(fā)出纖維終止于 Barrington's 核和 D 區(qū)內(nèi)欧美亚洲天堂在线。

projection fiber：投射纖維

projection exposure ==> 投影曝光 | projection fiber ==> 投射纖維 | projection fibers ==> 投射纖維