Related Experiment Video
Updated: Jun 21, 2026
08:58
Optogenetic Manipulation of Neural Circuits During Monitoring Sleep/wakefulness States in Mice
Published on: June 19, 2019
Neurophysiology of sleep and wakefulness: basic science and clinical implications
Jonathan R L Schwartz1, Thomas Roth
1Integris Sleep Disorders Center of Oklahoma, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA. SchwJR@integris-health.com
Current Neuropharmacology
|July 10, 2009
Summary
Understanding the neurobiology of sleep and wakefulness is crucial for treating excessive sleepiness. This review details the brain
Area of Science:
- Neuroscience
- Sleep Medicine
- Neurobiology
Background:
- Excessive sleepiness necessitates a deeper understanding of sleep-wake neurobiology.
- While interconnected, sleep and wakefulness involve distinct brain processing and neurochemical systems.
Purpose of the Study:
- To review the neurobiological underpinnings of the sleep-wake cycle.
- To examine the neuronal pathways, transmitters, and receptors of the ascending arousal system.
- To discuss the regulation of sleep-wake states and related disorders.
Main Methods:
- Review of current research on the neurobiology of sleep and wakefulness.
- Examination of neuronal pathways, neurotransmitters, and receptors involved in arousal.
- Analysis of the interaction between arousal and sleep-promoting systems.
- Discussion of homeostatic and circadian influences on sleep-wake regulation.
Main Results:
- The ascending arousal system involves complex pathways from the brainstem to the cortex.
- Mutually inhibitory interactions between arousal and sleep-active neurons regulate state stability.
- Homeostatic and circadian processes, coordinated by the suprachiasmatic nucleus, influence the sleep-wake cycle.
Conclusions:
- Disorders of sleep and wakefulness, including insomnia and narcolepsy, are linked to disruptions in these neurobiological systems.
- Understanding these mechanisms is key to developing effective treatments for sleep disorders.
- This review provides a comprehensive overview of the neurobiology of sleep and wakefulness.
Keywords:
Excessive sleepinessarousal systemcircadian rhythmneurobiologysleep disorders.sleep-wake statesMore Related Videos
Related Concept Videos
01:11Understanding Sleep
Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
01:24Sleep-Wake Cycles
Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
01:25Overview of Synapses
A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...
01:23Understanding Consciousness
Consciousness can be defined as the state of being aware of and able to think about one's existence, sensations, and surroundings. It encompasses two major components: awareness and arousal. Awareness pertains to the recognition of environmental stimuli and internal states. At the same time, arousal refers to the physiological readiness to engage with these stimuli, which varies significantly between states like sleep and wakefulness.
Sleep, a crucial state, is characterized by reduced physical...
Sleep, a crucial state, is characterized by reduced physical...
01:22Stages of Sleep
Sleep progresses through distinct stages, each characterized by specific brain wave patterns and physiological responses ranging from wakefulness to stages of non-rapid eye movement, known as non-REM, to rapid eye movement, referred to as REM. Understanding these stages helps in recognizing how sleep supports various bodily and cognitive functions.
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
01:07Narcolepsy
Narcolepsy is a chronic sleep disorder characterized by pervasive, uncontrolled sleepiness and other sleep disturbances. One of its hallmark symptoms is an abrupt transition to REM sleep upon falling asleep, which causes symptoms typically associated with this phase to occur unexpectedly during wakefulness. These include the following symptoms, which typically last from a minute or two to half an hour.