Cranial Cavity: Circulation and Cranial Nerves

Meninges – coverings that protect the parts of the nervous system that lie within the cranial cavity and spinal canal

Vessels – the circulation of the brain is unique in that the venous drainage has little to do with the arterial supply

Cerebral Spinal Fluid – protein-free plasma ultrafiltrate with altered ion concentration (perhaps evolved to prevent seizures)

Ventricles – cavities in the brain where the CSF is made and circulates prior to entering the subarachnoid space

Cranial Nerves and Fossae

CN VII: Facial - mixed motor and sensory

CN V: Trigeminal – mixed motor sensory : largest cranial nerve