Ataxy

loss of coordination of the muscles, especially of the extremities.
Historical Examples

Most commonly our diagnosis is soon assisted by the occurrence of a greater or less degree of ataxy.
Neuralgia and the Diseases that Resemble it Francis E. Anstie

Laudanum would settle the present ataxy of her animal spirits, and prevent her being too watchful.
Three Hours after Marriage John Gay

noun
(pathol) lack of muscular coordination
n.

also anglicized as ataxy, “irregularity of bodily functions,” 1610s, “confusion, disorder,” medical Latin, from Greek ataxia, from a-, privative prefix, + taxis “arrangement, order,” from stem of tassein “to arrange” (see tactics). Pathological sense is attested from 1660s.

ataxia a·tax·i·a (ə-tāk’sē-ə) or a·tax·y (ə-tāk’sē)
n.
Loss of the ability to coordinate muscular movement. Also called dyssynergia, incoordination.
ataxia
(ə-tāk’sē-ə)
Loss of muscular coordination as a result of damage to the central nervous system.