case studycatalepsycataplexycatatonic excitmentcatatonic posturingcatatonic rigiditycatharsiscentral nervous systemcentrationcerebellumcerebral cortexcerebral hemispherecerebrumchronic stresschronological agechunkingcircadian rhythmcircumstantilityclang associationclassical conditioningclientclient centered therapyclinical psychologistclosureclouding of consiousnessclutteringcochleacognitioncognitive appraisalcognitive behavior modificationcognitive developmentcognitive dissonancecognitive mapcognitive processescognitive psychologycognitive sciencecognitive therapycollective unconsciouscomacommand hullucinationcomorbiditycomplementary colorscompliancecompulsionconceptsconcrete thinkingconditioned reinforcesconditioned responseconditioned stimulusconditioning