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Related Concept Videos

Anatomical Positions01:11

Anatomical Positions

In anatomy, several standard anatomical positions are used as references for describing the position and orientation of different body parts. These positions help provide a common frame of reference when discussing anatomical structures. The anatomical position is the standard reference point for describing the body's position and orientation. In this position:
The body is upright, facing forward, and standing erect.
The feet are parallel and flat on the floor.
The arms are hanging by the...

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Evaluation of Patients' Posture and Gait Profile After Lumbar Fusion Surgery by Video Rasterstereography and Treadmill Gait Analysis
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Spine alignment in men during lateral sleep position: experimental study and modeling.

Karim Leilnahari1, Nasser Fatouraee, Mahmoud Khodalotfi

  • 1Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran. k.leilnahari@srbiau.ac.ir

Biomedical Engineering Online
|December 2, 2011
PubMed
Summary

Customized mattresses offer superior spinal support for heavier men, promoting better spinal alignment and health. This study compared custom, soft, and firm mattress arrangements to determine optimal sleep system configurations.

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Precision Measurements and Parametric Models of Vertebral Endplates
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Precision Measurements and Parametric Models of Vertebral Endplates

Published on: September 17, 2019

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Published on: September 17, 2019

Area of Science:

  • Biomechanics
  • Spinal Health
  • Sleep System Design

Background:

  • Optimal spinal support during sleep is crucial for maintaining a neutral spine position.
  • Previous research primarily focused on traditional mattresses, neglecting personalized sleep surfaces.
  • Custom-made sleep surfaces with zonal elasticity can potentially enhance spinal alignment.

Purpose of the Study:

  • To evaluate spinal alignment on different sleep surfaces (soft, firm, custom-made).
  • To determine the optimal sleep surface stiffness for individuals based on anthropometric data.
  • To compare experimental and modeling approaches for assessing spinal alignment and sleep surface properties.

Main Methods:

  • Optical tracking recorded spinal alignment in the frontal plane for 25 male volunteers in lateral sleep position.
  • Spinal alignment was analyzed on soft, firm, and custom-made mattresses, with π-P₈ angles extracted.
  • Biomechanical modeling using BRG.LifeMOD analyzed anthropometric data from four volunteer types.

Main Results:

  • Significant differences in π-P₈ angles were found between soft & custom-made (p=0.001) and soft & firm (p=0.05) mattresses.
  • Quantitative data on required sleep surface stiffness was obtained for different weight-dimensional groups.
  • Both experimental and modeling methods showed consistent trends in spinal alignment variations.

Conclusions:

  • Custom-made mattresses are more suitable for heavier men with pronounced body contours.
  • Determining optimal sleep surface stiffness is vital for maintaining spinal health.
  • The study highlights the importance of personalized sleep systems for spinal alignment.