Dizziness is a common complaint in ambulatory care, comprising 4% to 5% of all visits. AVS is characterized by rapid onset of vertigo, nausea/vomiting, nystagmus and head-motion intolerance. Vertigo is a symptom, not a diagnosis.
Hydrocephalus is a condition thatâs also known as water on the brain. Hydrocephalus can occur in older children and adults, particularly older adults.
1 Cerebrospinal fluid is a liquid that bathes the brain and spinal cord. An adult has about 140 mL (just under 5 oz) of spinal fluid. Typically, an adult makes 30-100 mL of spinal fluid daily.  A spinal tap can be performed in any person and at any age.