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Muscle tone can be increased or decreased after a stroke.

If muscle tone is increased it causes SPASTICITY (muscle tightness) resulting in difficulty moving or CLONUS (muscle spasm with repetitive uncontrollable movements).

If muscle tone is reduced, muscles appear floppy, called FLACCIDITY, which again reduces the persons ability to control their limb movements.

If there is a significant increase or decrease in the muscle tone of limbs then the ability to control the vehicle consistently must be considered, and as per the impact of hemiplegia alternative controls maybe needed.

If muscle tone is reduced in the muscles of the trunk then seating position within the vehicle will also need to be considered to allow consistent access to the chosen vehicle controls.