I was diagnosed with PD 6 yrs ago. Have several distinct symptoms of PD. Yet, have VERY little rigidity. I'm of the impression that rigidity is the central major symptom of PD. Wondering what it means to have most other symptoms but lack rigidity. My symptoms include tremors with pin rolling, severe balance diffculties, severe cognitive deficiencies in the area of executive functioning, burning & stabbing pain down left side of my body, little reflex response, impaired sense of smell, cramping of toes & legs, numbness in feet & hands, micrograghia, tendency to shuffle and stoop when walking, perceptual coordination difficulties, and swallowing issues. Does anyone know what lack of significant rigidity may indicate? Or do you have any experience with or ideas about this phenomenon?