Related Experiment Video
Updated: Apr 17, 2026
10:56
Quantifying Infra-slow Dynamics of Spectral Power and Heart Rate in Sleeping Mice
Published on: August 2, 2017
10.7K
Relationship Between Mobility and Arousal Level After Waking Up.
Masahiko Wakasa1, Sachiko Uemura, Wakako Ito
11Department of Physical Therapy, Akita University Graduate School of Health Sciences, Akita, Hondo, Japan. 2Department of Neuropsychiatry Section of Neuro and Locomotor Science, Akita University Graduate School of Medicine, Akita, Hondo, Japan.
Journal of Geriatric Physical Therapy (2001)
|February 20, 2015
Summary
Older adults experience reduced mobility and increased sleepiness after waking, potentially increasing fall risk. Monitoring arousal levels can aid in early morning fall prevention strategies.
Area of Science:
- Gerontology
- Sleep Medicine
- Biomechanics
Background:
- Falls are a significant concern for older adults, particularly in the morning.
- Limited research exists on morning falls linked to arousal and immediate post-awakening mobility.
Purpose of the Study:
- To investigate the relationship between arousal levels, mobility, and falls in older adults during early morning hours.
Main Methods:
- Evaluated arousal and mobility in 14 older adults using Timed Up and Go, Functional Reach, postural sway, and critical frequency of fusion tests.
- Measured subjective sleepiness using the Stanford Sleepiness Scale.
- Assessed changes from 4:00 AM to 2:00 PM, comparing post-awakening to pre-sleep baseline.
Main Results:
- Significant decreases in Timed Up and Go test speed and increased sleepiness (Stanford Sleepiness Scale) were observed after waking compared to before sleep.
- Morning mobility was slower, and sleepiness levels were higher in participants post-awakening.
Conclusions:
- Reduced arousal levels in the early morning appear to negatively impact mobility in older adults.
- Awareness and monitoring of arousal levels may enhance fall prevention strategies for this demographic in the morning.
Related Concept Videos
01:23Optimal Arousal Theory
1.3K
The optimal arousal theory suggests that performance is maximized when an individual experiences a moderate level of arousal. This theory is closely tied to the Yerkes-Dodson law, which illustrates an inverted U-shaped relationship between arousal and performance. The law, formulated by psychologists Robert Yerkes and John Dodson, implies an ideal arousal level for optimal performance, and deviations from this level can lead to declines in effectiveness.
Inverted U-Shaped Performance Curve
The...
Inverted U-Shaped Performance Curve
The...
1.3K
01:24Sleep-Wake Cycles
3.5K
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:
3.5K
01:22Stages of Sleep
1.8K
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...
1.8K
01:24Primary Motives: Sleep, Sex, and Pain Avoidance
7.7K
Primary motives such as sleep, sex, and pain avoidance are crucial drivers of behavior in humans and animals. These motives ensure survival, reproductive success, and overall well-being by prompting actions that meet essential bodily needs.
Sleep is a fundamental physiological drive that fosters a state of restfulness crucial for several bodily functions. It facilitates body restoration, the process by which the body repairs, rejuvenates, and maintains itself during sleep, including memory...
Sleep is a fundamental physiological drive that fosters a state of restfulness crucial for several bodily functions. It facilitates body restoration, the process by which the body repairs, rejuvenates, and maintains itself during sleep, including memory...
7.7K
01:16Sympathetic Activation
8.5K
The sympathetic division can influence tissues and organs by releasing norepinephrine at peripheral synapses and distributing epinephrine and norepinephrine through the bloodstream. In times of crisis or stress, sympathetic activation occurs, which is regulated by sympathetic centers in the hypothalamus. As a result, sympathetic activation prepares the body for physical exertion, rapid ATP production, and heightened alertness, allowing individuals to respond effectively to challenging or...
8.5K
01:15REM Sleep Behavior Disorder
2.7K
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...
2.7K