都在想象/

那么彷徨/

誰(shuí)的目光/

投射在那復(fù)雜的腦干/

浮現(xiàn)不安的模樣/

頂蓋和背蓋/

我?guī)е悦?

……

當(dāng)頂蓋撞臉被蓋

當(dāng)中腦變成橋腦

頂還是原來(lái)的頂？

被還是原來(lái)的被嘛？

        在腦室系統(tǒng)與腦干腹側(cè)部（大腦腳腳底、腦橋基底部和延髓椎體）之間的廣泛區(qū)域，稱為腦干被蓋部（tegmentum）。tegmentum亦是來(lái)源于拉丁語(yǔ)，意為covering。被蓋構(gòu)成腦干的主體，包括腦神經(jīng)及腦神經(jīng)核、上行的四個(gè)丘系、網(wǎng)狀結(jié)構(gòu)和各類非腦神經(jīng)核團(tuán)、某些下行傳導(dǎo)通路以及中縫。被蓋在中腦和腦橋分界不同：1.中腦借中腦水管分為背側(cè)的頂蓋和腹側(cè)的大腦腳，大腦腳又被黑質(zhì)分為腹側(cè)的大腦腳底和背側(cè)的被蓋。2.腦橋的內(nèi)部結(jié)構(gòu)以斜方體為界，分為腹側(cè)的基底部和背側(cè)的被蓋部。

頂蓋（tectum），Tectum是拉丁語(yǔ)詞匯，意為roof；是相對(duì)被蓋而言，位于中腦導(dǎo)水管的背側(cè)，由一對(duì)上丘和一對(duì)下丘組成（又稱為四疊體），參與視覺(jué)聽覺(jué)反射。

The tegmentum (fromLatin for 'covering') is a general area within the brainstem. It islocated between the ventricular system and distinctive basal or ventralstructures at each level. It forms the floor of the midbrain (mesencephalon)whereas the tectum forms the ceiling. It is a multisynaptic network of neuronsthat is involved in many unconscious homeostatic and reflexive pathways. It isa motor center that relays inhibitory signals to the thalamus and basal nucleipreventing unwanted body movement. The tegmentum area includes variousdifferent structures, such as the 'rostral (=frontal/cranial/oral) end ofthe reticular formation, several nuclei controlling eye movements, the periaqueductalgray matter, the red nucleus, the substantia nigra, and the ventral tegmentalarea.'

在胚胎時(shí)期，被蓋是神經(jīng)管的前半部分。從胎兒到成人發(fā)育過(guò)程中，被蓋在腦干保持相對(duì)不變，特別是在中腦。

Inembryos, the tegmentum is the anterior half of the neural tube. However, forfetuses to adults, tegmentum refers only to the parts of the brain that remainrelatively unchanged after development is complete, i.e. at the brain stemespecially the midbrain. Other parts, on the other hand, develop further,through folding and thickening, and have different names. Still, it isconsidered a continuous central region through all levels of the brainstem.

有老師在后臺(tái)給萌妹子留言說(shuō)分不清頂蓋和被蓋，萌妹子也分不清噢！趁五一的時(shí)間查了查，分享給需要的老師，您看了后能分清了嗎？

萌妹子和大漢感謝有您的關(guān)注和支持，祝您勞動(dòng)節(jié)快樂(lè)。