PsychologyJuly 4, 2026
anesthesia
/ˌæn.əsˈθiː.zi.ə/
Definition
A state of controlled, temporary loss of sensation or awareness, often induced by medical means to block nerve signals in the brain.
Etymology
Derived from the Greek word 'anaisthesia,' meaning 'lack of sensation' or 'insensibility.' The term combines the prefix 'an-' (without) and 'aisthesis' (sensation) and was formally introduced into medical terminology in the mid-19th century.
In the news
The term appears in a headline regarding how brain activity under anesthesia provides new insights into the nature of human consciousness. It serves as a scientific baseline for researchers studying how the brain functions when typical awareness is suspended.
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