Lec 13 - Arousal & attention - lecture

Lec 13 - Arousal & attention - lecture -...

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Foundations of Occupation:  Neuroscience Cognition: Arousal, Attention
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What is cognition? The ability of the brain to process, store, retrieve, and manipulate information Involves registration, attention, motivation, perception, memory, language, processing of emotions, and executive functions
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Sleep and Wakefulness The human brain alternates between periods of wakefulness and sleep. The need for sleep is absolutely essential to occupational performance.
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Sleep Is sleep an occupation? Stages of sleep: Non-REM 1: drowsy sleep REM Rapid eye movement and rapid, low voltage EEG Muscular atonia Typically a person completes 3-5 cycles each night
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Sleep As one enters sleep Postsynaptic inhibition of the alpha motor neurons in the brain stem and spinal cord occurs, resulting in muscle relaxation Parasympathetic system dominates During deep sleep Postsynaptic inhibition of motor neurons and presynaptic inhibition of all sensory systems Basically, the nervous system cuts itself off from the exterior world Muscle atonia
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Sleep Disorders Insomnia: difficulty initiating and maintaining sleep Over 40% of Americans experience some form of insomnia Sleep apnea: pauses in breathing during sleep Hypersomnia Narcolepsy: excessive daytime sleepiness Parasomnia: disorders that disturb sleep, occurring when falling asleep, between sleep stages, or arousal from sleep Somnambulism: Night terrors: extreme terror and a temporary inability to regain full consciousness
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Arousal and Alertness Definitions Arousal: the transition from a sleep to a waking state Alertness: transition from waking to an attentive state Dependent on sensory registration at a conscious level Necessary for learning & adaptive behavior
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Lec 13 - Arousal & attention - lecture -...

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