Related Experiment Video
Updated: Jan 27, 2026
05:37
Tickling, a Technique for Inducing Positive Affect When Handling Rats
Published on: May 8, 2018
41.9K
Does the prone sleeping position affect the intracranial dural venous flow?
Satoshi Tsutsumi1, Hideo Ono2, Yukimasa Yasumoto3
1Department of Neurological Surgery, Juntendo University Urayasu Hospital, 2-1-1 Tomioka, Urayasu, Chiba, 279-0021, Japan. shotaro@juntendo-urayasu.jp.
Summary
Sleeping in the prone position increases intracranial dural venous flow through specific sinuses. This posture may alter venous drainage pathways, affecting blood flow in the brain.
Area of Science:
- Neuroimaging
- Vascular Neurology
- Anatomy
Background:
- Intracranial dural venous flow dynamics are not well understood in relation to body posture.
- Understanding venous flow alterations is crucial for neurological health and disease research.
Purpose of the Study:
- To investigate the impact of the prone position on intracranial dural venous flow.
- To utilize magnetic resonance (MR) venography for assessing postural changes in venous flow.
Main Methods:
- Eight patients underwent non-contrast MR venography.
- Imaging was performed in both supine and prone positions to compare flow dynamics.
Main Results:
- Prone positioning led to increased flow in non-dominant transverse and sigmoid sinuses in all patients.
- Seventy-five percent of patients showed increased flow in the straight sinus when prone.
- Flow in the superior ophthalmic vein decreased in three patients; no changes were noted in the superior sagittal or dominant transverse/sigmoid sinuses.
Conclusions:
- The prone sleeping position may redirect intracranial venous drainage.
- Preferential drainage may occur via the straight and non-dominant transverse sinuses when in a prone position.
Related Concept Videos
01:24Role of Affect in Interpersonal Attraction
220
Affect plays a crucial role in shaping interpersonal evaluations and perceptions. Emotions influence how individuals judge and respond to others, often determining whether interactions are viewed positively or negatively. This effect can manifest directly through interactions with the person in question or indirectly via associations with unrelated emotional experiences.Direct Effects of Affect on AttractionAffect directly influences interpersonal attraction when a person’s behavior...
220
01:13Insufficient Sleep and Sleep Deprivation
859
Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
Sleep deprivation is a more severe form of sleep loss...
Sleep deprivation is a more severe form of sleep loss...
859
01:29The Influence of Affect on Cognition
275
Positive affect significantly influences cognitive processes, including evaluation, memory, creativity, and social judgments. Compared to negative affect, positive emotional states promote more favorable interpretations of stimuli, cognitive flexibility, and heuristic processing. These effects highlight emotions' powerful role in shaping how individuals perceive, remember, and interact with the world.Influence on Evaluation and AttributionWhen individuals experience positive affect, they are...
275
01:29The Influence of Cognition on Affect
196
Cognition plays a pivotal role in shaping emotional experiences, as demonstrated by Schachter and Singer’s two-factor theory of emotion. According to this model, emotion arises from a combination of physiological arousal and cognitive interpretation. The body’s physiological response to stimuli is ambiguous and only gains emotional significance through cognitive labeling. For instance, an increased heart rate and adrenaline surge while standing near an attractive person may be...
196
01:22Stages of Sleep
1.4K
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...
1.4K
02:27Background and Environment Affect Phenotype
7.5K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
7.5K