Hydromyelia is a medical condition that involves widening of the intraspinal cavity or is a marked dilatation of the central spinal canal. The central canal of the spinal column is the main area of affectation that results to increased pressure due to fluid accumulation.
dangling participle - a participle (usually at the beginning of a sentence) apparently modifying a word other than the word intended: e.g., `flying across the country' in `flying across the country the Rockies came into view'.
In English grammar, a participial phrase is a word group consisting of a present participle (also known as an -ing form) or past participle (also known as an -en form), plus any modifiers, objects, and complements. A participial phrase commonly functions as an adjective. See Examples and Observations below.