3-Dimensional Buttocks Response to Sitting: A Case Report

Sharon Sonenblum, Stephen Sprigle, John Cathcart, John Winder

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Aim of the study: The aim of this study was to describe an individual’s 3-dimensional buttocks response to sitting. Within that exploration, we specificallyconsidered tissue (i.e., fat and muscle) deformations, including tissue displacementsthat have not been identified by research published to date.Materials and methods: The buttocks anatomy of an able-bodied female duringsitting was collected in a FONAR Upright MRI. T1-weighted Fast Spin Echo scanswere collected with the individual seated on a custom wheelchair cushion witha cutout beneath the pelvis (“unloaded”), and seated on a 300 foam cushion(“loaded”). 2D slices of the MRI were analyzed, and bone and muscle weresegmented to permit 3D rendering and analyses.Results: MRIs indicated a marked decrease in muscle thickness under the ischialtuberosity during loaded sitting. This change in thickness resulted from a combinationof muscle displacement and distortion. The gluteus and hamstrings overlappedbeneath the pelvis in an unloaded condition, enveloping the ischial tuberosity. Butthe overlap was removed under load. The hamstrings moved anteriorly, while thegluteus moved posterior-laterally. Under load, neither muscle was directly beneaththe apex of the ischial tuberosity. Furthermore, there was a change in muscleshape, particularly posterior to the peak of the ischial tuberosity.
LanguageEnglish
Pages12-18
JournalJournal of Tissue Viability
Volume22
Publication statusPublished - 2013

Fingerprint

Buttocks
Muscles
Pelvis
Wheelchairs
Anatomy
Fats
Bone and Bones
Research

Cite this

Sonenblum, Sharon ; Sprigle, Stephen ; Cathcart, John ; Winder, John. / 3-Dimensional Buttocks Response to Sitting: A Case Report. In: Journal of Tissue Viability. 2013 ; Vol. 22. pp. 12-18.
@article{e22bd137999d4de082fb3d20b1b0d1ea,
title = "3-Dimensional Buttocks Response to Sitting: A Case Report",
abstract = "Aim of the study: The aim of this study was to describe an individual’s 3-dimensional buttocks response to sitting. Within that exploration, we specificallyconsidered tissue (i.e., fat and muscle) deformations, including tissue displacementsthat have not been identified by research published to date.Materials and methods: The buttocks anatomy of an able-bodied female duringsitting was collected in a FONAR Upright MRI. T1-weighted Fast Spin Echo scanswere collected with the individual seated on a custom wheelchair cushion witha cutout beneath the pelvis (“unloaded”), and seated on a 300 foam cushion(“loaded”). 2D slices of the MRI were analyzed, and bone and muscle weresegmented to permit 3D rendering and analyses.Results: MRIs indicated a marked decrease in muscle thickness under the ischialtuberosity during loaded sitting. This change in thickness resulted from a combinationof muscle displacement and distortion. The gluteus and hamstrings overlappedbeneath the pelvis in an unloaded condition, enveloping the ischial tuberosity. Butthe overlap was removed under load. The hamstrings moved anteriorly, while thegluteus moved posterior-laterally. Under load, neither muscle was directly beneaththe apex of the ischial tuberosity. Furthermore, there was a change in muscleshape, particularly posterior to the peak of the ischial tuberosity.",
author = "Sharon Sonenblum and Stephen Sprigle and John Cathcart and John Winder",
year = "2013",
language = "English",
volume = "22",
pages = "12--18",
journal = "Journal of Tissue Viability",
issn = "0965-206X",
publisher = "Elsevier",

}

Sonenblum, S, Sprigle, S, Cathcart, J & Winder, J 2013, '3-Dimensional Buttocks Response to Sitting: A Case Report', Journal of Tissue Viability, vol. 22, pp. 12-18.

3-Dimensional Buttocks Response to Sitting: A Case Report. / Sonenblum, Sharon; Sprigle, Stephen; Cathcart, John; Winder, John.

In: Journal of Tissue Viability, Vol. 22, 2013, p. 12-18.

Research output: Contribution to journalArticle

TY - JOUR

T1 - 3-Dimensional Buttocks Response to Sitting: A Case Report

AU - Sonenblum, Sharon

AU - Sprigle, Stephen

AU - Cathcart, John

AU - Winder, John

PY - 2013

Y1 - 2013

N2 - Aim of the study: The aim of this study was to describe an individual’s 3-dimensional buttocks response to sitting. Within that exploration, we specificallyconsidered tissue (i.e., fat and muscle) deformations, including tissue displacementsthat have not been identified by research published to date.Materials and methods: The buttocks anatomy of an able-bodied female duringsitting was collected in a FONAR Upright MRI. T1-weighted Fast Spin Echo scanswere collected with the individual seated on a custom wheelchair cushion witha cutout beneath the pelvis (“unloaded”), and seated on a 300 foam cushion(“loaded”). 2D slices of the MRI were analyzed, and bone and muscle weresegmented to permit 3D rendering and analyses.Results: MRIs indicated a marked decrease in muscle thickness under the ischialtuberosity during loaded sitting. This change in thickness resulted from a combinationof muscle displacement and distortion. The gluteus and hamstrings overlappedbeneath the pelvis in an unloaded condition, enveloping the ischial tuberosity. Butthe overlap was removed under load. The hamstrings moved anteriorly, while thegluteus moved posterior-laterally. Under load, neither muscle was directly beneaththe apex of the ischial tuberosity. Furthermore, there was a change in muscleshape, particularly posterior to the peak of the ischial tuberosity.

AB - Aim of the study: The aim of this study was to describe an individual’s 3-dimensional buttocks response to sitting. Within that exploration, we specificallyconsidered tissue (i.e., fat and muscle) deformations, including tissue displacementsthat have not been identified by research published to date.Materials and methods: The buttocks anatomy of an able-bodied female duringsitting was collected in a FONAR Upright MRI. T1-weighted Fast Spin Echo scanswere collected with the individual seated on a custom wheelchair cushion witha cutout beneath the pelvis (“unloaded”), and seated on a 300 foam cushion(“loaded”). 2D slices of the MRI were analyzed, and bone and muscle weresegmented to permit 3D rendering and analyses.Results: MRIs indicated a marked decrease in muscle thickness under the ischialtuberosity during loaded sitting. This change in thickness resulted from a combinationof muscle displacement and distortion. The gluteus and hamstrings overlappedbeneath the pelvis in an unloaded condition, enveloping the ischial tuberosity. Butthe overlap was removed under load. The hamstrings moved anteriorly, while thegluteus moved posterior-laterally. Under load, neither muscle was directly beneaththe apex of the ischial tuberosity. Furthermore, there was a change in muscleshape, particularly posterior to the peak of the ischial tuberosity.

M3 - Article

VL - 22

SP - 12

EP - 18

JO - Journal of Tissue Viability

T2 - Journal of Tissue Viability

JF - Journal of Tissue Viability

SN - 0965-206X

ER -