Structurally, nervous system is classified into two types: Central Nervous System (CNS) ; and Peripheral Nervous System (PNS) ; The Central Nervous System comprises of the brain and spinal cord.
The CNS controls our ability to breathe and keep our heart beating, and when depressed too far by CNS depressants, these functions can slow down and eventually stop.
医学百科 The Medicine Book (Big Ideas Simply Explained)
By dissecting animals' brains in the 2nd century CE, Roman physician Galen of Pergamum established that the nerves directing motor functions and those linked to the sensors are controlled by different parts of the CNS.
And Jean Comstock, first-time question asker, and Carly V. wanted to know, in Jean's words, I usually read that demyelination from MS occurs primarily or only in the CNS.
Contrast-enhanced MRI is preferable to CT and unenhanced MRI in the diagnosis of BM, because of its greater resolution and ability to differentiate metastases from other CNS lesions.