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Introduction to Joints

Introduction to Joints

The adult human body usually has 206 bones, and except for the hyoid bone in the neck, each bone is connected to at least one other bone. Joints are the location where bones come together. Many joints allow for movement between the bones. At these joints, the articulating surfaces of the adjacent bones can move smoothly against each other. However, the bones of other joints may be joined by connective tissue or cartilage. These joints are designed for stability and provide little or no...

Structural Joints: Synovial Joints

Structural Joints: Synovial Joints

Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...

Anatomical Movements

Anatomical Movements

Anatomical movements refer to the various actions or motions that can be performed by the body's joints and muscles. These movements are described using specific terms to provide a standardized way of discussing and understanding the range of motion at different joints.
Here are some common anatomical movements:
Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion. These movements take place at the shoulder, hip, elbow, knee, wrist,...

Muscle Coordination and Action

Muscle Coordination and Action

Muscle coordination is a complex and finely tuned process essential for smooth and purposeful movements like flexion, extension, adduction, abduction, and rotation. The human body orchestrates the actions of various muscles working in concert, each with a specific role. Four functional types describe how muscles work together: agonist, antagonist, synergist, and fixator.
Agonists
Agonist muscles, often called prime movers, are the primary muscles responsible for producing a specific movement....

Muscles that Move the Arm

Muscles that Move the Arm

Nine muscles are involved in arm movements. Two of these, the pectoralis major and latissimus dorsi, originate from the axial skeleton and are called axial muscles. The other seven originate from the scapula and are called the scapular muscles.
The pectoralis major has two origins. Its clavicular head originates on the medial half of the clavicle. In contrast, the sternocostal head originates on the costal cartilages of ribs 1-6, the sternum, and the aponeurosis of the external oblique of the...

Joints

Joints

Joints, also called articulations or articular surfaces, are points at which ligaments or other tissues connect adjacent bones. Joints permit movement and stability, and can be classified based on their structure or function.
Structural joint classifications are based on the material that makes up the joint as well as whether or not the joint contains a space between the bones. Joints are structurally classified as fibrous, cartilaginous, or synovial.
Fibrous Joints Are Immovable
The bones of a...

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Related Experiment Video

Updated: May 3, 2026

A Novel Application of Musculoskeletal Ultrasound Imaging

A Novel Application of Musculoskeletal Ultrasound Imaging

Published on: September 17, 2013

Aging muscles and joints: mobilization.

Helen W Lach¹, Rebecca A Lorenz¹, Kristine M L'Ecuyer¹

¹Saint Louis University School of Nursing, 3525 Caroline Mall, St Louis, MO 63104, USA.

Critical Care Nursing Clinics of North America

|February 4, 2014

Summary

Early mobilization is crucial for older patients in critical care to combat immobility and regain strength. Implementing comprehensive mobility programs led by nurses improves patient outcomes and reduces clinical risks.

Keywords:

Aging Critical care Mobility programs Mobilization

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Area of Science:

Gerontology
Critical Care Medicine
Physical Therapy

Background:

Critical illness frequently leads to immobility in elderly patients.
Immobility results in significant loss of muscle strength and functional capacity.
Contributing factors include medical conditions, equipment, nutrition, restraints, and staff priorities.

Purpose of the Study:

To highlight the benefits of early mobilization for older critical care patients.
To identify key components of successful patient mobility programs.
To emphasize the role of nurses in facilitating patient mobilization.

Main Methods:

Literature review on immobility and mobilization in older critical care patients.
Analysis of factors contributing to immobility.
Examination of components of effective mobility programs.

Main Results:

Early mobilization significantly mitigates the negative effects of immobility.
Successful programs require thorough patient assessment, targeted interventions, and interprofessional collaboration.
Nurses play a pivotal role in implementing and leading these programs.

Conclusions:

Early mobilization is essential for improving functional outcomes in older critical care patients.
Comprehensive mobility programs, driven by interprofessional teams, are effective.
Nurses are key leaders in reducing clinical risks associated with immobility in this population.