Note that the ectopic cerebellar tonsils are positioned snugly in the posterolateral subarachnoid space of the cervical spinal canal. Chiari I malformation is not directly associated with other congenital brain malformations, specifically myelomeningocele, which is a feature of Chiari II malformation.ote that the ectopic cerebellar tonsils are positioned snugly in the posterolateral subarachnoid space of the cervical spinal canal. Chiari I malformation is not directly associated with other congenital brain malformations, specifically myelomeningocele, which is a feature of Chiari II malformation.
Silvis, Illinois. Silvis is a city in Rock Island County, Illinois, United States. It is part of a larger metropolitan area known as the Quad Cities. The Quad Cities Metropolitan Area is situated across four counties in Illinois and Iowa. Silvis is the first community one encounters when entering the Quad Cities from the east on Interstate 88.
The City of Silvis (initially named Pleasant Valley) was incorporated in 1906. The Village took its name from Richard Shippen Silvis, one of the original settlers whose family operated the Silvis Mining Company. Silvis changed from a Village to a City in 1920.