Closed truss: 1) A truss with a tie beam; 2) a roof system with a ceiling so the framing is not visible. Open truss: 1) A truss with an interrupted tie beam or scissor truss which allow a vaulted ceiling area; 2) Roof framing open to view, not hidden by a ceiling. King post truss
Memory disruptions by alcohol leading to blackout have been linked to inhibition of long-term potentiation, particularly in the hippocampus, by affecting gamma-Aminobutyric acid (GABA) and N-methyl-D-aspartate neurotransmission (see Effects of alcohol on memory).
The short-term effects of alcohol (ethanol) consumption range from a decrease in anxiety and motor skills at lower doses to unconsciousness, anterograde amnesia, and central nervous system depression at higher doses.