TABLE 1.

The “bradykinesia complex”

Feature	Definition	Types of movements being affected
Bradykinesia	Reduced velocity of movements	Single or repetitive, alternating and continuous movements (limbs and body axis)
Hypokinesia	Reduced amplitude of movements	Single or repetitive, alternating and continuous movements (limbs and body axis)
Sequence effect	Progressive reduction in amplitude and/or velocity	Repetitive, alternating, and continuous movements (limbs)
Hesitations/halts	Irregularities in movement timing	Repetitive, alternating, and continuous movements (limbs)
Akinesia	Inability to perform a movement	Single, repetitive, alternating, and continuous movements (limbs and body axis)
Oligokinesia	Reduction/lack of spontaneous/ automatic movements	Spontaneous blinking, spontaneous facial expressions, pendular movements of the upper limbs during walking

Note: The definitions of bradykinesia and related features (hypokinesia, sequence effect, and hesitations/halts) are summarized.