242 results match your criteria buttock models

Morbidity and Function Loss After Resection of Malignant Peripheral Nerve Sheath Tumors.

Neurosurgery 2021 Sep 15. Epub 2021 Sep 15.

Department of Plastic and Reconstructive Surgery, University Medical Center Utrecht, the Netherlands.

Background: Malignant peripheral nerve sheath tumors (MPNSTs) are aggressive soft tissue sarcomas. Their resection may lead to serious morbidity. Incidence of postoperative motor and sensory deficits is unknown, and reconstruction aimed at restoring such deficits is infrequently carried out. Read More

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September 2021

Ketogenic diets consumed during radio-chemotherapy have beneficial effects on quality of life and metabolic health in patients with rectal cancer.

Eur J Nutr 2021 Jun 27. Epub 2021 Jun 27.

Department of Radiation Oncology, Leopoldina Hospital Schweinfurt, Robert-Koch-Straße 10, 97422, Schweinfurt, Germany.

Purpose: Interest in ketogenic diets (KDs) as complementary nutritional treatments for cancer patients is rising, although some skepticism about their safety exists. We, therefore, studied the effects of KDs on quality of life and blood parameters in rectal cancer patients undergoing radio-chemotherapy.

Methods: EORTC-QLQ30 questionnaire scores and different metabolic and hormonal blood parameters were obtained prior to, in the middle of and at the end of radiotherapy within the KETOCOMP study (ClinicalTrials. Read More

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Whole Body PMHS Response in Injurious Experimental Accelerative Loading Events.

Ann Biomed Eng 2021 Jun 17. Epub 2021 Jun 17.

Johns Hopkins Applied Physics Lab, Laurel, MD, USA.

Previous studies involving whole-body post-mortem human surrogates (PHMS) have generated biomechanical response specifications for physically simulated accelerative loading intended to reproduce seat and floor velocity histories occurring in under-body blast (UBB) events (e.g.,. Read More

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How muscle stiffness affects human body model behavior.

Biomed Eng Online 2021 Jun 2;20(1):53. Epub 2021 Jun 2.

Fraunhofer-Institute for High-Speed Dynamics, Ernst-Mach-Institut, EMI, Ernst-Zermelo-Straße 4, 79104, Freiburg, Germany.

Background: Active human body models (AHBM) consider musculoskeletal movement and joint stiffness via active muscle truss elements in the finite element (FE) codes in dynamic application. In the latest models, such as THUMS™ Version 5, nearly all human muscle groups are modeled in form of one-dimensional truss elements connecting each joint. While a lot of work has been done to improve the active and passive behavior of this 1D muscle system in the past, the volumetric muscle system of THUMS was modeled in a much more simplified way based on Post Mortem Human Subject (PMHS) test data. Read More

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Effect of legroom proportions and individual factors for sitting with crossed legs: implications on the interior design of automated driving vehicles.

Ergonomics 2021 Jun 7:1-12. Epub 2021 Jun 7.

Department of Biomechanics in Sports, Faculty for Sport and Health Sciences, Technical University of Munich, Munich, Germany.

Sitting with crossed legs is a commonly adopted sitting posture in everyday situations. Yet, little is known about suitable design criteria to facilitate such a position inside a vehicle. This study is aimed at determining how much space is necessary for crossing the legs while considering legroom restrictions, anthropometric measures, and individual flexibility. Read More

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Tissue matters: In-vivo tissue properties of persons with spinal cord injuries to inform clinical models for pressure ulcer prevention.

J Biomech 2021 05 21;120:110389. Epub 2021 Mar 21.

Department of Mechanical Engineering, Michigan State University, 428 S Shaw Lane, Rm 2555, East Lansing, MI 48824, USA. Electronic address:

The prevalence of pressure ulcers in patients with spinal cord injuries has been estimated to be between 30% and 47%. Individuals with spinal cord injuries sit for a majority of the time, increasing the risk of developing pressure ulcers in the buttocks and thighs due to large internal stresses. Human body models have been developed to study the formation of pressure ulcers, yet a persistent limitation in these models has been the material properties used to represent the soft tissues in the buttocks and thighs. Read More

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A three-dimensional finite-element model of gluteus medius muscle incorporating inverse-dynamics-based optimization for simulation of non-uniform muscle contraction.

Med Eng Phys 2021 01 20;87:38-44. Epub 2020 Nov 20.

Department of Engineering Mechanics, Dalian University of Technology, Dalian, China. Electronic address:

Non-uniform contraction exists in many skeletal muscles and plays an important role in the function of the musculoskeletal system. Particularly in the gluteus medius (GM) muscle, its three subdivisions appear activated differently while performing various motion tasks. However, the non-uniform contractile mechanism of GM is poorly understood. Read More

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January 2021

Ischial tuberosity: new donor site for bone grafts in animal cleft research.

Sci Rep 2020 11 26;10(1):20699. Epub 2020 Nov 26.

Department of Oral and Maxillofacial Surgery, University Hospital of Aachen, Pauwelsstraße 30, 52074, Aachen, Germany.

In the context of cleft repair in animal research in rat models, different areas can be used for bone grafting. The aim of the present study was to present the tuberosity of the ischium as a new donor site and to evaluate its quality in relation to an artificial alveolar cleft. Four weeks after creating experimental alveolar clefts in seven Wistar rats, the repair was performed in the now twelve-week-old male animals using bone blocks grafted from the ischial tuberosity. Read More

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November 2020

The effects of body position on the material properties of soft tissue in the human thigh.

J Mech Behav Biomed Mater 2020 10 9;110:103964. Epub 2020 Jul 9.

Department of Mechanical Engineering, Michigan State University, 428 S Shaw Lane, Rm 255, East Lansing, MI, 48824, USA. Electronic address:

Forty percent of patients with a spinal cord injury acquire a pressure ulcer during rehabilitation, and sixty percent of individuals in elderly care facilities have at least one pressure ulcer upon admittance. A commonality between those populations is the increased amount of time they spend in the seated position. The loading on the buttocks and thighs while in the seated position has been cited as a risk factor for pressure ulcer formation, especially for wheelchair users. Read More

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October 2020

Anatomical 3D-Printed Silicone Prostate Gland Models and Rectal Examination Task Trainer for the Training of Medical Residents and Undergraduate Medical Students.

Cureus 2020 Jul 6;12(7):e9020. Epub 2020 Jul 6.

Health Sciences, Ontario Tech University, Oshawa, CAN.

The current generation of graduating medical students is entering into practice with minimal exposure to the digital rectal examination (DRE), a necessary component of a complete physical examination. Simulation-based medical education (SBME) using anatomical silicone models and task trainers can provide hands-on training opportunities for medical students to rehearse DREs. However, there is a scarcity of affordable, validated, and anatomically correct silicone prostate models and task trainers for rehearsing DREs. Read More

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Exploring the Paradoxical Relationship of a Creb 3 Regulatory Factor Missense Variant With Body Mass Index and Diabetes Among Samoans: Protocol for the Soifua Manuia (Good Health) Observational Cohort Study.

JMIR Res Protoc 2020 Jul 23;9(7):e17329. Epub 2020 Jul 23.

Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, United States.

Background: The prevalence of obesity and diabetes in Samoa, like many other Pacific Island nations, has reached epidemic proportions. Although the etiology of these conditions can be largely attributed to the rapidly changing economic and nutritional environment, a recently identified genetic variant, rs373863828 (CREB 3 regulatory factor, CREBRF: c.1370G>A p. Read More

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Relationship between seat surface shape and pressure distribution in school seat models.

Work 2020 ;66(1):161-171

Department of Industrial Engineering, Pontificia Universidad Javeriana, Bogotá, Colombia.

Background: Students remain in a sedentary position inside classrooms for 60% to 80% of their school day. As such, research has associated students' prolonged seated posture on school furniture with their discomfort and musculoskeletal pain. The correlation between the shape of the seat surface and the zones of the body making contact with these surfaces constitutes an essential factor in determining comfort-enhancing seat design. Read More

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January 2021

Skin pigmentation and genetic variants in an admixed Brazilian population of primarily European ancestry.

Int J Legal Med 2020 Sep 9;134(5):1569-1579. Epub 2020 May 9.

DNA Diagnostic Laboratory (LDD), Institute of Biology, State University of Rio de Janeiro (UERJ), Rio de Janeiro, Brazil.

Although many genes have been shown to be associated with human pigmentary traits and forensic prediction assays exist (e.g. HIrisPlex-S), the genetic knowledge about skin colour remains incomplete. Read More

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September 2020

The Impact of Race, Age, Gender, Income, and Level of Education on Motivations to Pursue Cosmetic Surgery and Surgeon Selection at an Academic Institution.

Plast Reconstr Surg 2020 05;145(5):932e-939e

From the Division of Plastic and Reconstructive Surgery and the Perelman School of Medicine, University of Pennsylvania.

Background: Aesthetic surgery is a personal choice that appeals to a wide population of individuals. The authors investigated how race and ethnicity, age, gender, income, and education level affect patient motivation to pursue cosmetic surgery and selection of a plastic surgeon.

Methods: One hundred seventy-two consecutive patients from two surgeons (an African American man and a Caucasian woman) completed surveys from 2016 to 2017 that assessed their decision to pursue cosmetic surgery. Read More

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Is a simplified Finite Element model of the gluteus region able to capture the mechanical response of the internal soft tissues under compression?

Clin Biomech (Bristol, Avon) 2020 01 22;71:92-100. Epub 2019 Oct 22.

Institut de Biomécanique Humaine Georges Charpak, Arts et Métiers ParisTech, 151 bd de l'Hôpital, 75013 Paris, France. Electronic address:

Background: Internal soft tissue strains have been shown to be one of the main factors responsible for the onset of Pressure Ulcers and to be representative of its risk of development. However, the estimation of this parameter using Finite Element (FE) analysis in clinical setups is currently hindered by costly acquisition, reconstruction and computation times. Ultrasound (US) imaging is a promising candidate for the clinical assessment of both morphological and material parameters. Read More

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January 2020

Long-term hemodynamic mechanism of enhanced external counterpulsation in the treatment of coronary heart disease: a geometric multiscale simulation.

Med Biol Eng Comput 2019 Nov 14;57(11):2417-2433. Epub 2019 Sep 14.

College of Life Science and Bioengineering, Beijing University of Technology, No. 100 Pingleyuan, Chaoyang District, Beijing, 100124, People's Republic of China.

Enhanced external counterpulsation (EECP) is a noninvasive treatment method for coronary artery atherosclerosis that acts on the vascular endothelial cells. The intracoronary hemodynamic parameters that influence long-term treatment effect are the fundamental factors for the inhibition of intimal hyperplasia, which cannot be measured in real time. In order to optimize the long-term treatment effect of coronary heart disease, it is necessary to establish a method for quantified calculation of intracoronary hemodynamic parameters during counterpulsation to research the long-term hemodynamic mechanism of EECP. Read More

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November 2019

A Novel Mobile Tool (Somatomap) to Assess Body Image Perception Pilot Tested With Fashion Models and Nonmodels: Cross-Sectional Study.

JMIR Ment Health 2019 Oct 29;6(10):e14115. Epub 2019 Oct 29.

Laureate Institute for Brain Research, Tulsa, OK, United States.

Background: Distorted perception of one's body and appearance, in general, is a core feature of several psychiatric disorders including anorexia nervosa and body dysmorphic disorder and is operative to varying degrees in nonclinical populations. Yet, body image perception is challenging to assess, given its subjective nature and variety of manifestations. The currently available methods have several limitations including restricted ability to assess perceptions of specific body areas. Read More

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October 2019

Hemodynamic effects of enhanced external counterpulsation on cerebral arteries: a multiscale study.

Biomed Eng Online 2019 Aug 28;18(1):91. Epub 2019 Aug 28.

Department of Biomedical Engineering, College of Life Science and Bioengineering, Beijing University of Technology, No. 100 Pingleyuan, Chaoyang District, Beijing, 100124, China.

Background: Enhanced external counterpulsation (EECP) is an effective method for treating patients with cerebral ischemic stroke, while hemodynamics is the major contributing factor in the treatment of EECP. Different counterpulsation modes have the potential to lead to different acute and long-term hemodynamic changes, resulting in different treatment effects. However, various questions about appropriate counterpulsation modes for optimizing hemodynamic effects remain unanswered in clinical treatment. Read More

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Pelvis and femur shape prediction using principal component analysis for body model on seat comfort assessment. Impact on the prediction of the used palpable anatomical landmarks as predictors.

PLoS One 2019 27;14(8):e0221201. Epub 2019 Aug 27.

Univ Lyon, Université Claude Bernard Lyon 1, Lyon, France.

A personalized pelvis and femur shape is required to build a finite element buttock thigh model when experimentally investigating seating discomfort. The present study estimates the shape of pelvis and femur using a principal component analysis (PCA) based method with a limited number of palpable anatomical landmarks (ALs) as predictors. A leave-one-out experiment was designed using 38 pelvises and femurs from a same sample of adult specimens. Read More

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Inverse finite element characterization of the human thigh soft tissue in the seated position.

Biomech Model Mechanobiol 2020 Feb 16;19(1):305-316. Epub 2019 Aug 16.

Department of Mechanical Engineering, Michigan State University, 428 S. Shaw Lane Room 2463, East Lansing, MI, 48824, USA.

Pressure ulcers are localized damage to the skin and underlying tissues caused by sitting or lying in one position for a long time. Stresses within the soft tissue of the thigh and buttocks area play a crucial role in the initiating mechanism of these wounds. Therefore, it is crucial to develop reliable finite element models to evaluate the stresses caused by physiological loadings. Read More

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February 2020

Estimation of Actual and Ideal Bodyweight Using Morphometric Measurements of Miniature, Saddle-Type, and Thoroughbred Horses.

J Equine Vet Sci 2019 07 13;78:117-122. Epub 2019 May 13.

Department of Animal Science, University of Minnesota, St. Paul, MN. Electronic address:

Adding breed type, height, and neck circumference to body length and girth circumference improves bodyweight (BW) estimation in different breeds of horses; however, equations have not been developed for all breed types. The objectives were to develop BW estimation equations for Miniature, saddle-type, and Thoroughbred horses using morphometric measurements. Measurements were collected on adult (≥3 years, nonpregnant) saddle-type (n = 209), adult (n = 249) and juvenile (<3 years, n = 61) Miniatures, and adult Thoroughbreds (n = 100). Read More

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Finite Element Method Analysis of Compression Fractures on Whole-Spine Models Including the Rib Cage.

Comput Math Methods Med 2019 5;2019:8348631. Epub 2019 May 5.

Faculty of Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan.

Spinal compression fractures commonly occur at the thoracolumbar junction. We have previously constructed a 3-dimensional whole-spine model from medical images by using the finite element method (FEM) and then used this model to develop a compression fracture model. However, these models lacked the rib cage. Read More

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January 2020

Development of a reproducible laser-induced scar model for wound healing study and management.

Biomed Opt Express 2019 Apr 22;10(4):1965-1977. Epub 2019 Mar 22.

Interdisciplinary Program of Marine-Bio, Electrical & Mechanical Engineering, Pukyong National University, Busan, South Korea.

The aim of the current study was to establish animal scar models in a simple and rapid manner by comparing three methods. Wounds were created on the buttocks of Sprague Dawley rats. For Group 1, the initial wound was created by surgical incision. Read More

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Work-related discomfort among floor-sitting sedge weavers: a cross-sectional survey.

Int J Occup Saf Ergon 2021 Jun 23;27(2):523-534. Epub 2019 May 23.

Faculty of Medicine, Prince of Songkla University, Thailand.

. This cross-sectional survey aimed to evaluate and identify risk factors of work-related discomfort among floor-sitting Thai sedge handicraft weavers. . Read More

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Hip muscle strength and protection against structural worsening and poor function and disability outcomes in knee osteoarthritis.

Osteoarthritis Cartilage 2019 06 28;27(6):885-894. Epub 2019 Feb 28.

Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA. Electronic address:

Objective: Examine associations of hip abductor strength with (1) cartilage damage worsening in the tibiofemoral and patellofemoral compartments 2 years later, and (2) poor function and disability outcomes 5 years later.

Methods: Participants had knee osteoarthritis (K/L ≥ 2) in at least one knee. Hip abductor strength was measured using Biodex Dynamometry. Read More

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[Effects of basic fibroblast growth factor on healing of infective wound in New Zealand rabbit after debridement].

Zhonghua Shao Shang Za Zhi 2019 Feb;35(2):95-103

Department of Burns and Plastic Surgery, Xiang'an Hospital of Xiamen University, Xiamen 361102, China.

To investigate the effects of basic fibroblast growth factor (bFGF) on healing of infective wound in New Zealand rabbit after debridement. Thirty-two New Zealand rabbits (3 to 4 months old, no matter male or female) were intradermally injected with 0.1 mL of complete Freund's adjuvant on the buttocks. Read More

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February 2019

Sex-related differences of clinical features in hidradenitis suppurativa: analysis of an Italian-based cohort.

Clin Exp Dermatol 2019 Jul 28;44(5):e177-e180. Epub 2018 Dec 28.

Dermatological Unit, Department of Clinical and Molecular Sciences, Polytechnic Marche University, Ancona, Italy.

The clinical characteristics associated with hidradenitis suppurativa (HS) severity are poorly understood. In this study, 124 patients with HS from 6 Italian dermatology centres participated in this study. Disease severity was assessed using the Hidradenitis Suppurativa Physician's Global Assessment score (HS-PGA) and Hurley score. Read More

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Constrained Dynamic Optimization of Sit-to-Stand Motion Driven by Bézier Curves.

J Biomech Eng 2018 12;140(12)

ASME Fellow Systems Design Engineering, University of Waterloo, , Waterloo, ON N2 L 3G1, Canada e-mail: .

The purpose of this work is twofold: first, to synthesize a motion pattern imitating sit-to-stand (STS) and second, to compare the kinematics and dynamics of the resulting motion to healthy STS. Predicting STS in simulation inspired the creation of three models: a biomechanical model, a motion model, and performance criteria as a model of preference. First, the human is represented as three rigid links in the sagittal plane. Read More

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December 2018

Identification of new factors associated to walking impairment in patients with vascular-type claudication.

Vascular 2019 Jun 15;27(3):260-269. Epub 2018 Nov 15.

4 Exercise and Sports Medicine, University Hospital, Angers, France.

Objectives: Mechanisms of walking limitation in arterial claudication are incompletely elucidated. We aimed to identify new variables associated to walking limitation in patients with claudication.

Methods: We retrospectively analyzed data of 1120 patients referred for transcutaneous exercise oxygen pressure recordings (TcpO). Read More

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Adipose tissue polyunsaturated fatty acids and metabolic syndrome among adult parents and their children.

Nutr Metab Cardiovasc Dis 2018 12 6;28(12):1237-1244. Epub 2018 Sep 6.

Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI, USA; Center for Human Growth and Development, University of Michigan, Ann Arbor, MI, USA.

Background And Aims: Polyunsaturated fatty acids (PUFA) may play a role in the etiology of the metabolic syndrome (MetS). The aim of the study was to examine the associations of adipose tissue PUFA biomarkers with MetS among parents and children in Mesoamerica.

Method And Results: We conducted a cross-sectional study among 468 parents and 201 children aged 7-12 y from the capital cities of Guatemala, El Salvador, the Dominican Republic, Honduras, Nicaragua, Panama, Costa Rica, and Belize, and Tuxtla Gutiérrez in Mexico. Read More

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December 2018