Cerebral Palsy maybe/maybe not

alternate blood flow from nearby vessels will be spared or transiently involved then recover. The zone of brain supplied by the middle cerebral artery minus those portions which also get blood supply from elsewhere (including anterior cerebral artery as seen here) is the distribution area of brain injury in hemiplegia. You can see why arm & hand – in the main area of the middle cerebral artery gets affected more than the lower leg which resides In the inner surface of the hemisphere [ventricles, mid-brain and spinal cord shown in black].

That gives a characteristic pattern of involvement. An arterial blockage may produce a very small deficit if collateral (extra) arteries are abundant and well connected. Preemies have many extra temporary arteries covering the brain