Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Biodiversity and Human Values01:24

Biodiversity and Human Values

17.2K
Human civilization relies on biodiversity in many ways. Sudden changes in species biodiversity result in environmental changes that can modify weather patterns and therefore human civilizations.
17.2K
Professional Values01:29

Professional Values

11.0K
Nurses are responsible for caring for patients during birth, death, illness, and healing. Professional values guide the decisions and actions that nurses make in their careers. If nurses know the decisions and actions to take, providing patients with exceptional care is possible.
The values that are the foundation of the nursing profession are altruism, autonomy, human dignity, and social justice.
First, altruism refers to the concern for the welfare and well-being of others without personal...
11.0K
Critical Values01:31

Critical Values

10.4K
A critical value is a definite value obtained from a particular probability distribution at a predecided confidence level (or a predecided significance level) for a given population parameter. The critical value provides demarcation that separates the sample statistics that are likely to occur from the ones that are unlikely to occur based on the given probability distribution and the population parameter to be estimated. The critical value for normal distribution is obtained from the z...
10.4K
Population Growth00:57

Population Growth

28.8K
Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.
28.8K
What is Population Genetics?01:25

What is Population Genetics?

65.0K
A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.
65.0K
Thoracic Aorta01:15

Thoracic Aorta

1.9K
The thoracic section of the aorta begins at the T5 vertebra and extends to the T12 level at the diaphragm, initially progressing through the mediastinum to the left of the spinal column. Throughout its course in the thoracic segment, the thoracic aorta emits various offshoots known collectively as visceral and parietal branches. The branches that predominantly supply blood to visceral organs are termed visceral branches and include bronchial, pericardial, esophageal, and mediastinal arteries,...
1.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

[The expression of Plakoglobin in residual cancer after neoadjuvant chemotherapy for breast cancer and its prognostic impact on patients].

Zhonghua zhong liu za zhi [Chinese journal of oncology]·2023
Same author

[<b>Efficacy analysis of retroperitoneal laparoscopic selective renal artery branch occlusion and nephron sparing surgery for</b> ≥ <b>T1b stage renal carcinoma</b>].

Zhonghua yi xue za zhi·2021
Same author

Satellite imaging reveals increased proportion of population exposed to floods.

Nature·2021
Same author

Anatomic accuracy of airway training manikins compared with humans.

Anaesthesia·2020
Same author

[Influence of different inner dressings in negative-pressure wound therapy on escharectomy wound of full-thickness burn rabbits].

Zhonghua shao shang za zhi = Zhonghua shaoshang zazhi = Chinese journal of burns·2017
Same author

[Effects of different fluid resuscitation program on renal function in swine during shock stage of severe burn].

Zhonghua shao shang za zhi = Zhonghua shaoshang zazhi = Chinese journal of burns·2016

Related Experiment Video

Updated: Feb 16, 2026

A Mouse Model of Lumbar Spine Instability
05:28

A Mouse Model of Lumbar Spine Instability

Published on: April 23, 2021

9.1K

Quantifying Sarcopenia Reference Values Using Lumbar and Thoracic Muscle Areas in a Healthy Population.

B A Derstine1, S A Holcombe, R L Goulson

  • 1S.C. Wang, Morphomics Analysis Group, University of Michigan, Ann Arbor, MI, USA, stewartw@med.umich.edu.

The Journal of Nutrition, Health & Aging
|January 5, 2018
PubMed
Summary
This summary is machine-generated.

This study provides crucial reference values for skeletal muscle mass in healthy US adults using CT scans. These findings aid in diagnosing sarcopenia by establishing normal ranges for muscle cross-sectional area.

Keywords:
Sarcopeniacomputed tomographymorphomicsmusclesarcopenia cutpointsarcopenic cutoff

More Related Videos

Transaxillary First Rib Resection for Treatment of the Thoracic Outlet Syndrome
06:57

Transaxillary First Rib Resection for Treatment of the Thoracic Outlet Syndrome

Published on: September 13, 2020

4.2K
A Rapid Automated Protocol for Muscle Fiber Population Analysis in Rat Muscle Cross Sections Using Myosin Heavy Chain Immunohistochemistry
05:57

A Rapid Automated Protocol for Muscle Fiber Population Analysis in Rat Muscle Cross Sections Using Myosin Heavy Chain Immunohistochemistry

Published on: March 28, 2017

11.8K

Related Experiment Videos

Last Updated: Feb 16, 2026

A Mouse Model of Lumbar Spine Instability
05:28

A Mouse Model of Lumbar Spine Instability

Published on: April 23, 2021

9.1K
Transaxillary First Rib Resection for Treatment of the Thoracic Outlet Syndrome
06:57

Transaxillary First Rib Resection for Treatment of the Thoracic Outlet Syndrome

Published on: September 13, 2020

4.2K
A Rapid Automated Protocol for Muscle Fiber Population Analysis in Rat Muscle Cross Sections Using Myosin Heavy Chain Immunohistochemistry
05:57

A Rapid Automated Protocol for Muscle Fiber Population Analysis in Rat Muscle Cross Sections Using Myosin Heavy Chain Immunohistochemistry

Published on: March 28, 2017

11.8K

Area of Science:

  • Gerontology
  • Radiology
  • Anatomy

Background:

  • Sarcopenia, the age-related loss of muscle mass and function, poses a significant health concern.
  • Accurate quantification of muscle mass via CT scans is vital, yet reference data in healthy US populations is scarce.

Purpose of the Study:

  • To establish reference measurements for skeletal muscle cross-sectional area (CSA) in a healthy US population.
  • To determine the optimal Hounsfield Unit (HU) range and assess the impact of contrast on muscle CSA measurements.

Main Methods:

  • Utilized two-phase CT scans from 604 healthy kidney donors (age 18-40).
  • Quantified thoracic and lumbar muscle CSA, including height-indexed measurements.
  • Analyzed the effects of contrast and various HU ranges on CSA values.

Main Results:

  • Provided reference CSA (cm²) and height-indexed CSA (cm²/m²) cutoffs for multiple muscle groups (T12, L3, L4) in males and females.
  • Established an optimal HU range of -29 to 150 for muscle quantification.
  • Confirmed no significant difference in CSA measurements between contrast-enhanced and non-contrast CT scans within the optimal HU range.

Conclusions:

  • Quantified essential reference values for lumbar and thoracic muscle CSA in a healthy US cohort.
  • Defined the impact of IV contrast and HU ranges on muscle measurements.
  • Facilitates the clinical utility of existing CT scans for sarcopenia assessment.