Relating to that part of the brain known as the cerebrum. The cerebral cortex is the outer layer of the brain consisting of nerve cells and pathways responsible for cognitive function, including reasoning, mood, and perception of stimuli. Cerebral hypoxia occurs when there is a deficiency in supply of oxygen to the brain, even though there may be adequate blood flow. If mild it is characterized by symptoms of inattentiveness, poor judgement, and memory loss, but when severe it can lead to loss of consciousness and collapse. Cerebral palsy is a non-progressive neuromuscular disorder characterized by varying degrees of impairment. Sufferers have poor oro-motor control, and therefore high-volume chairside aspiration needs to be constant for dental procedures. Intravenous or oral sedation may be necessary because uncontrolled movements can jeopardize safe treatment.