Meninges

The concentration achieved in brain and cerebrospinal fluid is around 30 to 50% of the overall average body concentration, even when the meninges are not inflamed; this increases to as high as 89% when the meninges are inflamed.

Bacterial can directly invade the meninges as in the case of ear infection, sinus infection, skull fracture and some surgeries.

Meningitis is an infection of the meninges, the lining around the brain and spinal cord.

He also proposed that the pain arose from the meninges and blood vessels of the head.

Meningitis inflammation of the meninges, the membranes that envelop the brain and the spinal cord; may cause hearing loss or deafness.

Other bacterial pathogens, like Mycoplasma and those causing rickettsial disease, cause inflammation of the meninges and consequently encephalitis.

The medulla oblongata is at the start of the spinal cord and is composed mainly of neuron tissue enveloped in Schwann cells and meninges tissue.

Tumors of the meninges are meningiomas and are often benign.

Vertebrate brains are surrounded by a system of connective tissue membranes called meninges that separate the skull from the brain.