psychobiology lecture 6

What are the two main biological processes that regulate sleep?

Sleep-wake homeostasis (Process S) and Circadian rhythm (Process C).

What is polysomnography

A method of measuring sleep that combines Electroencephalography (EEG), Electrooculography (EOG), and Electromyography (EMG).

What are zeitgebers?

Environmental cues that regulate circadian rhythms, such as light exposure, eating, activity, and socializing.

What is the role of the Suprachiasmatic Nucleus (SCN) in sleep regulation?

The SCN is the brain's master circadian pacemaker, controlling sleep-wake cycles by responding to light exposure.

What happens to circadian rhythms when the SCN is damaged?

loss of circadian rhythm

What is the Dim Light Melatonin Onset (DLMO)?

The time at which melatonin levels rise above a threshold under dim light conditions, indicating an individual's circadian phase.

What is the Perfect Storm model in relation to adolescent sleep?

It describes the interaction of bioregulatory, psychosocial, and societal pressures that negatively impact sleep during adolescence.

What is the impact of sleep restriction on cognitive function?

Sleep restriction can lead to a steady decline in attention and cognitive performance.

How does sleep deprivation affect REM sleep?

It selectively deprives individuals of REM-rich final hours of sleep, which is crucial for emotional regulation.

What is the recommended shift pattern for minimizing sleep disruption in shift workers?

Shifts that move gradually clockwise rather than changing irregularly and quickly.

What is the relationship between sleep duration and suicidal ideation?

Short sleep duration and insomnia symptoms are linked to increased suicidal ideation.

What are the implications of the Perfect Storm model for sleep interventions?

Interventions must consider bioregulatory, psychosocial, and societal factors to effectively address sleep issues in adolescents.