Bradykinesia in Parkinson's disease refers to:

Bradykinesia specifically refers to the slowness of movement, which is a hallmark symptom of Parkinson's disease. In Parkinson’s disease, individuals experience a gradual reduction in their ability to initiate and execute movements, resulting in a noticeable decrease in the speed of voluntary movements. This symptom profoundly affects daily activities, making tasks that require physical movement more difficult and time-consuming.

The term "bradykinesia" derives from Greek roots meaning "slow" and "movement," thus encapsulating the essence of this symptom. While coordination difficulties can occur in Parkinson's disease, they are not defined as bradykinesia. Similarly, fast movements and involuntary movements, such as tremors, are not characteristics of bradykinesia. This makes the definition of bradykinesia distinctly tied to the experience of moving slowly rather than experiencing any of the other motion-related symptoms.