What is the key difference between spasticity and rigidity?
Spasticity is velocity-dependent; rigidity is not.
What neurological lesion is spasticity typically associated with?
Upper motor neuron lesions.
What neurological lesion is rigidity typically associated with?
Basal ganglia dysfunction, such as in Parkinson’s disease.
What are the two types of rigidity?
Cogwheel rigidity (jerky, ratchet-like movements) and lead-pipe rigidity (uniform resistance throughout movement).
How does spasticity affect movement?
Resistance increases with faster passive movement, making movement harder.
Is rigidity usually unilateral or bilateral?
Bilateral, especially in Parkinson’s disease.
Is spasticity usually unilateral or bilateral?
Often unilateral, especially in stroke or cerebral palsy.
