Adiadochokinesia is a dyskinesia consisting of inability to perform the rapid alternating movements of diadochokinesia.

Abnormalities in diadochokinesia can be seen in the upper extremity, lower extremity and in speech.

Diadochokinesia or diadochokinesis is the ability to make antagonistic movements in quick succession, alternately bringing a limb into opposite positions, as of flexion and extension or of pronation and supination.

Dysdiadochokinesia, dysdiadochokinesis, dysdiadokokinesia, dysdiadokokinesis (from Greek dys "bad", diadocho "receive", kinesia "movement"), often abbreviated as DDK, is the medical term for an impaired ability to perform rapid, alternating movements (i.e. diadochokinesia).

Diadochokinesia or diadochokinesis is the ability to make antagonistic movements in quick succession, alternately bringing a limb into opposite positions, as of flexion and extension or of pronation and supination.