Hydrocephalus refers to the presence of too large a volume of cerebrospinal fluid in the cavities of the brain called ventricles. The normal pressure hydrocephalus is a form of chronic hydrocephalus in adults related to partial obstruction of the cerebrospinal fluid channels. The symptoms are disorders of balance and gait, urinary and sometimes rectal incontinence, and cognitive disorders with impairment of mental faculties. Hydrocephalus is then discovered after completion of brain imaging, or an MRI scan. A shunt may be implemented for removing the cerebrospinal fluid. Another alternative is to carry out lumbar punctures, piercing the lower back will enable the evacuation of the excess liquid.