Related Experiment Video
Updated: Jul 17, 2026
06:23
A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice
Published on: September 22, 2020
Idiopathic rapid eye movement sleep behaviour disorder
M L Fantini1, L Ferini-Strambi
1Sleep Disorders Center, Department of Neurology, Università Vita-Salute San Raffaele, Via Stamira d'Ancona 20, I-20127, Milan, Italy, fantini.marialivia@hrs.it.
Summary
Rapid eye movement sleep behaviour disorder (RBD) involves acting out dreams, potentially causing harm. Research suggests "idiopathic" RBD may actually be "cryptogenic," indicating underlying neurological issues.
Area of Science:
- Neurology
- Sleep Medicine
- Neuroscience
Background:
- Rapid eye movement (REM) sleep behaviour disorder (RBD) is a parasomnia characterized by loss of muscle atonia during REM sleep, leading to acting out dreams.
- RBD affects primarily men over 50, with an estimated 0.5% prevalence, and can be acute or chronic.
- Chronic RBD is often associated with alpha-synucleinopathies like Parkinson's disease and dementia with Lewy bodies, or can be idiopathic.
Purpose of the Study:
- To explore the nature of idiopathic RBD (iRBD) and its potential underlying neurological causes.
- To challenge the notion of
Main Methods:
- Review of polysomnographic (PSG) findings in RBD patients.
- Analysis of clinical follow-up studies on iRBD patients.
- Examination of recent research on neural dysfunction in iRBD.
Main Results:
- PSG in RBD patients shows loss of atonia and excessive motor activity during REM sleep.
- A significant proportion of iRBD patients develop parkinsonian syndromes or dementia with Lewy bodies over time.
- Evidence suggests neural dysfunction in iRBD, including cortical, neuropsychological, autonomic, and sensory deficits.
Conclusions:
- The term "idiopathic" RBD is increasingly questioned due to evidence of underlying neural dysfunction.
- A more accurate term, "cryptogenic" RBD, is proposed to reflect the potentially hidden neurological origins.
- iRBD may represent an early stage of neurodegenerative diseases, necessitating further investigation.
Related Concept Videos
01:15REM Sleep Behavior Disorder
REM Sleep Behavior Disorder (RBD) is a sleep disorder characterized by the absence of muscle paralysis that normally occurs during the REM phase of sleep. This absence allows individuals to physically act out their dreams, which are often vivid and disturbing. Common behaviors exhibited during episodes include kicking, punching, and yelling. These actions can be dangerous, potentially leading to injuries for the person with RBD or their bed partner.
RBD is significantly associated with...
RBD is significantly associated with...
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:
01:27Restless Leg Syndrome and Night Terrors
Restless Leg Syndrome (RLS), also known as Willis-Ekbom disease, is a neurological disorder characterized by an uncontrollable urge to move the legs due to uncomfortable sensations. These sensations typically occur during periods of rest or inactivity, particularly when lying down or sitting, and can severely disrupt sleep.
The exact cause of RLS is not fully understood, but it is believed to involve dopamine, a neurotransmitter that helps regulate muscle movement. Imbalances in dopamine levels...
The exact cause of RLS is not fully understood, but it is believed to involve dopamine, a neurotransmitter that helps regulate muscle movement. Imbalances in dopamine levels...
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.
01:17Sleepwalking and Sleep Talking
Somnambulism, commonly known as sleepwalking, involves individuals engaging in activities ranging from simple walking to more complex behaviors such as driving. Sleepwalking typically occurs during the slow-wave sleep stages 3 and 4 early in the night when the person is not dreaming, contradicting the myth that sleepwalkers are acting out their dreams.
Factors that increase the likelihood of sleepwalking include sleep deprivation and alcohol consumption. Contrary to common beliefs, it is safe...
Factors that increase the likelihood of sleepwalking include sleep deprivation and alcohol consumption. Contrary to common beliefs, it is safe...
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...