News on the Amygdala
This piece of news is not really sleep related but I find it really interesting that scientists are finding relationships between size of parts brain that correlates to certain activity. The amygdala is pretty close to the hypothalamus where the orexin/hypocretins (orexin A/hypocretin-1 and orexin B/hypocretin-2) also called peptides are produced by a very small population of cells in the lateral and posterior area. The peptides send projections throughout the brain. Their function is to bind a protein to the orexin receptors. As a narcoleptic you can have non-existing or very low levels orexin, or have a glitches/problems with how effectively it binds to the receptors. The function of this system is the hypothalamus is or was initially suggested to be primarily involved with the stimulation with food intake but it also stimulates wakefulness and energy expenditure.
If you want to read more on the neighbour: the amygdala click the link below:
The Guardian.co.uk writes: Social whirl of a life? Thank your amygdala