Final answer:
Spastic cerebral palsy is associated with prematurity and periventricular leukomalacia, characterized by stiff muscles and movement difficulties.
Step-by-step explanation:
The type of cerebral palsy that is associated with prematurity and periventricular leukomalacia is 1) Spastic cerebral palsy. Spastic cerebral palsy is the most common form and is characterized by stiff muscles and difficulty in movement. Prematurity is a known risk factor for cerebral palsy, and periventricular leukomalacia, which is a form of white matter brain injury that affects infants, is often seen in premature infants who develop cerebral palsy. The stiffness associated with spastic cerebral palsy can impact walking and posture, requiring management and therapy to improve quality of life.