Head-down Posture
Head-down Posture - Related Videos
09:37
Substantiating Appropriate Motion Capture Techniques for the Assessment of Nordic Walking Gait and Posture in Older Adults
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Cited by 5 •
2016
The aim was to substantiate optimal use of data collection techniques for Nordic walking gait and posture analysis. Three-dimensional motion capture should be used during short duration analysis (i.e. single gait cycle), while accelerometry should be employed for longer duration analysis (i.e. repeated cycles) like a 6 Minute Walk Test.
14:52
Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication
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Cited by 57 •
2013
Individuals with intermittent claudication exhibit poor balance compared to healthy controls. Computerized dynamic posturography is an objective method for measuring an individual's postural responses to balance disturbances. This provides an objective reflection of the person’s ability to respond to situations under which sensory stimuli are altered and unexpected perturbations occur.
12:18
An Instrumented Pull Test to Characterize Postural Responses
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Cited by 1 •
2019
Impairment of postural reflexes, termed postural instability, is difficult to quantify. Clinical assessments such as the pull test suffer issues with reliability and scaling. Here, we present an instrumented version of the pull test to objectively characterize postural responses.
08:11
Assessing Forelimb Function after Unilateral Cervical SCI using Novel Tasks: Limb Step-alternation, Postural Instability and Pasta Handling
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Cited by 9 •
2013
Three new behavioral tests (forelimb step-alternation, postural instability test, pasta handling test) for evaluating forelimb function after cervical spinal cord injury in rodents are described.
08:12
Experimental Methods to Study Human Postural Control
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Cited by 25 •
2019
This article presents an experimental/analytic framework to study human postural control. The protocol provides step-by-step procedures for performing standing experiments, measuring body kinematics and kinetics signals, and analyzing the results to provide insight into the mechanisms underlying human postural control.
FAQs
The posture increases venous pressure in the upper body, which can alter pressure conditions affecting the brain. These changes may influence intracranial pressure, the pressure within the skull, and cerebral blood flow, meaning the movement of blood through brain tissue. Studying both responses helps researchers examine how fluid redistribution affects neural function and cerebral circulation.
Changing body orientation modifies the balance-related sensory information received by the vestibular system. The brain must interpret these altered signals alongside cardiovascular and pressure changes, which can affect studies of orientation and postural regulation. This makes the posture useful for separating responses linked to vestibular input from those caused by fluid redistribution or cardiovascular stress.
Autonomic regulation helps coordinate the body's response to altered blood distribution and cardiovascular stress. Head-down positioning provides a controlled challenge for examining how the nervous system adjusts to these changes, particularly in relation to orthostatic regulation. The resulting observations can clarify how neural control mechanisms contribute to maintaining stable circulation when pressure and body orientation change.
Researchers use head-down positioning as an experimental condition that changes pressure and sensory inputs before examining nervous-system responses. Comparing those responses with the body's regulation of posture-related cardiovascular stress can reveal mechanisms involved in orthostatic control. This approach connects altered fluid distribution with the neural processes responsible for adapting to changes in body position.
Spaceflight-related adaptation is one important context for this approach because altered fluid distribution can challenge systems that normally respond to gravity and body orientation. Studying head-down positioning helps researchers investigate how cerebral, vestibular, and autonomic responses interact under such conditions. The findings may clarify mechanisms that contribute to nervous-system adaptation during spaceflight.
The approach can support investigations of cerebral function, vestibular function, and cardiovascular regulation when pressure and sensory conditions change together. It is especially relevant to questions about how the brain responds to altered fluid distribution and balance-related input. Researchers can also use it to examine mechanisms associated with disorders involving cerebral or vestibular function.