Arousal threshold refers to the level of stimulus intensity required to transition an individual from a state of sleep to wakefulness. It varies across different stages of sleep, with deeper sleep stages having higher arousal thresholds, making it more difficult to wake someone during these times.

Arousal Threshold

Arousal threshold

Stimulus intensity refers to the magnitude or strength of a stimulus, which can affect the sensory perception and response of an organism. It plays a crucial role in determining the threshold and adaptation of sensory systems, influencing how stimuli are processed and perceived.

stimulus intensity

state of sleep

Wakefulness is a state of consciousness characterized by alertness and awareness of the environment, primarily governed by the brain's reticular activating system. It is essential for cognitive functions, allowing individuals to process information, make decisions, and interact with their surroundings effectively.

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