what is the main function of the reticular formation
The ascending system is connected to cerebral cortex, hypothalamus, and also the thalamus. The descending system is connected to several sensory nerves and the cerebellum. The reticular system consists of those brain parts which are in charge of survival instincts. That is the reason why this system has deep connection with the various awareness brain functions. The functions of RAS are under the control of some cholinergic (acetylcholine) and adrenergic (Adrenaline) neurotransmitters.