Corrard F
Arch Pediatr. 1999 Jan;6(1):87-92. doi: 10.1016/S0929-693X(99)80080-3.
The brain is especially sensitive to heat stress. To limit the increase of intracranial heat in case of hyperthermia or fever, a system of selective cooling is put on. It includes two heat-exchangers. The first one, in the face and scalp skin, disperses calories through sweat evaporation. The second one is intracranial, close to the arteries which irrigate the brain. They are connected by a vascular network. In these conditions, the arterial blood temperature, of which cerebral temperature depends upon, is reduced by the cooled venous blood which comes from subcutaneous tissues through the skull wall. On feverish children, increasing such a selective cooling by face fanning can limit cerebral thermal stress.
大脑对热应激特别敏感。为了在体温过高或发烧时限制颅内热量的增加，启用了一种选择性冷却系统。它包括两个热交换器。第一个位于面部和头皮皮肤，通过汗液蒸发散发热量。第二个位于颅内，靠近为大脑供血的动脉。它们通过血管网络相连。在这种情况下，大脑温度所依赖的动脉血温度会被从皮下组织通过颅骨壁流回的冷却静脉血降低。对于发烧的儿童，通过扇脸来增强这种选择性冷却可以减轻脑部的热应激。
