altered consciousness
Medical and psychological term for a state where normal awareness or perception is changed, e.g., due to drugs, meditation, or brain conditions.
Drug-induced altered consciousness can be dangerous.
I experienced a mild altered state of consciousness during meditation.
意識障害 refers to a disturbance or impairment of consciousness (e.g., coma, confusion), while 意識変容 emphasizes a qualitative change in awareness without necessarily implying dysfunction.
Compound of 意識 (consciousness) and 変容 (transformation, change). The term is a modern calque from English 'altered consciousness' or 'altered state of consciousness', used primarily in medical and psychological contexts.