What are the states of consciousness?
Table 1. Characteristics of the 3 Brain States
|Wakefulness||NREM Sleep||REM Sleep|
Alert and aware of environment
Not alert or aware of environment
Able to move
Muscles relaxed, no movement
Muscles are paralyzed (twitches can be seen)
BP, HR, Respiration, Body Temperature Regulation
Changes based on activity
Body is at rest and all are reduced.
Variability is present. Body is poikilothermic*
You are awake, able to move and respond to environment. “Active mind in an active body.”
You are asleep; brain and body are quiet and resting. “Quiet mind in a quiet body.”
You are asleep; brain is active and muscles are paralyzed. “Active mind in a paralyzed body.”
*absence of body temperature regulation