<P> Arachnoid cysts are cerebrospinal fluid covered by arachnoidal cells that may develop on the brain or spinal cord . They are a congenital disorder , and in some cases may not show symptoms . However , if there is a large cyst , symptoms may include headache , seizures , ataxia ( lack of muscle control ) , hemiparesis , and several others . Macrocephaly and ADHD are common among children , while presenile dementia , hydrocephalus ( an abnormality of the dynamics of the cerebrospinal fluid ) , and urinary incontinence are symptoms for elderly patients ( 65 and older ) . </P>
<P> Arachnoid cysts are cerebrospinal fluid covered by arachnoidal cells that may develop on the brain or spinal cord . They are a congenital disorder , and in some cases may not show symptoms . However , if there is a large cyst , symptoms may include headache , seizures , ataxia ( lack of muscle control ) , hemiparesis , and several others . Macrocephaly and ADHD are common among children , while presenile dementia , hydrocephalus ( an abnormality of the dynamics of the cerebrospinal fluid ) , and urinary incontinence are symptoms for elderly patients ( 65 and older ) . </P>
what nervous system disorder occurs when lesions form on the cerebral cortex causing dementia
what nervous system disorder occurs when lesions form on the cerebral cortex causing dementia
Arachnoid cysts
Arachnoid cysts