| 1 | By being exposed to a smell all day long it's tricking the hypothalamus. | |
| 2 | The spindles arise in the brain's sensory relay centre in the thalamus. | |
| 3 | Many of these hormones act at a brain region in the hypothalamus called the arcuate nucleus. | |
| 4 | Spindles, which only appear when we are asleep, are generated by a brain region called the thalamus. | |
| 5 | You may have your thalamus to thank, according to research that suggests this brain region helps people sleep through bumps in the night. |