George (2004) found that, when compared to controls, subjects with DPN exhibited significantly lower walking velocity, and cadence, as well as impaired reaction time and ability to produce rhythmic limb acceleration (9).
Brittle stars are a moderately popular invertebrate in fishkeeping. They can easily thrive in marine tanks; in fact, the micro brittle star is a common hitchhiker that will propagate and become common in almost any saltwater tank, if one happens to come along on some live rock.
Like sea stars, brittle stars have a water vascular system, and their tube feet are filled with water. The water is brought into the body using the madreporite, which is on the brittle star's ventral surface (underside). Within the central disk lie the brittle star's organs - it doesn't have a brain, but it has a large stomach, genitals, muscles, and a mouth surrounded by 5 jaws.