**6.6 Central nervous system (CNS)**

Currently, there is little known about CNS alterations in space [46, 47]. The following structures are more affected than other parts of the CNS: cerebellar, sensorimotor, and vestibular brain regions [48].

## **6.7 Autonomic nervous system**

Orthostatic stress has been reported, but its severity is less than on the Earth [49].
