limbic system

Reader's Digest ８月号の記事Is It Just Me?からの抜粋です。
Smells that everyone else seems to find awful, I love!
Wet paint! Petrol! Even (can I admit it here?) the smell of dirty socks - they sometimes smell like roasted nuts. Am I wired wrong?
...
The olfactory nerves go directly from the nose to the limbic systems, which is the part of the brain that stores memories and processes emotions. So if you fondly remember your mother taking care of you when you were sick, Vicks VapoRub may seem like heaven to you, as well dirty socks if you and your brother used to play in the woods and come home happy but stinky.
覚えたい表現は "limbic system" です。意味は上の文章だけで十分に分かりますが、覚えるために辞書の説明も読みます。
・Oxford English Dictionary: A complex system of nerves and networks in the brain, involving several areas near the edge of the cortex concerned with instinct and mood. It controls the basic emotions (fear, pleasure, anger) and drives (hunger, sex, dominance, care of offspring).
・Dictionary.com: a ring of interconnected structures in the midline of the brain around the hypothalamus, involved with emotion and memory and with homeostatic regulatory systems.: In his scheme, the limbic system evolved alongside the developing social complexity of the mammals.