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Related Concept Videos

Sutures of the Skull01:22

Sutures of the Skull

The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
Bone Formation by Intramembranous Ossification01:29

Bone Formation by Intramembranous Ossification

Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...
Changes in the Appendicular Skeleton with Age01:09

Changes in the Appendicular Skeleton with Age

The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Structural Joints: Cartilaginous Joints01:17

Structural Joints: Cartilaginous Joints

As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary or...
Articulations of the Vertebral Column01:28

Articulations of the Vertebral Column

In addition to being held together by the intervertebral discs, adjacent vertebrae also articulate with each other at synovial joints formed between the superior and inferior articular processes called zygapophysial joints (facet joints). These are plane joints that provide for only limited motions between the vertebrae. The orientation of the articular processes at these joints varies in different regions of the vertebral column and serves to determine the types of motions available in each...
Esophageal Strictures-II: Clinical Features and Management01:26

Esophageal Strictures-II: Clinical Features and Management

Patients with esophageal strictures often experience a range of symptoms. Initially, they may have difficulty swallowing solid foods, which can progress to include liquids. Additional symptoms may involve chest pain or discomfort, regurgitating food and fluids, heartburn, unintentional weight loss, coughing or choking during meals, and hoarseness.
Healthcare providers should gather a comprehensive medical history and conduct a physical examination for diagnosis. If esophageal stricture is...

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Related Experiment Video

Updated: Jul 5, 2026

Laminectomy for the Removal of Thoracic Ossification of the Ligamentum Flavum (TOLF) Using Ultrasonic and Conventional Osteotomes
07:12

Laminectomy for the Removal of Thoracic Ossification of the Ligamentum Flavum (TOLF) Using Ultrasonic and Conventional Osteotomes

Published on: April 21, 2023

Cervical ligamentum flavum ossification. Two case reports.

Kyongsong Kim1, Toyohiko Isu, Ryutaro Nomura

  • 1Department of Neurosurgery, Chiba Hokuso Hospital Nippon Medical School, Chiba, Japan.

Neurologia Medico-Chirurgica
|April 25, 2008
PubMed
Summary

Ossified ligamentum flavum can cause cervical stenosis and neurological symptoms. Surgical removal is effective, with diffuse types adhering to the dura mater, unlike focal types, aiding treatment planning.

Related Experiment Videos

Last Updated: Jul 5, 2026

Laminectomy for the Removal of Thoracic Ossification of the Ligamentum Flavum (TOLF) Using Ultrasonic and Conventional Osteotomes
07:12

Laminectomy for the Removal of Thoracic Ossification of the Ligamentum Flavum (TOLF) Using Ultrasonic and Conventional Osteotomes

Published on: April 21, 2023

Area of Science:

  • Neurosurgery
  • Spinal Surgery
  • Radiology

Background:

  • Cervical spinal stenosis due to ossification of the ligamentum flavum can lead to neurological deficits.
  • Surgical decompression is a common treatment for symptomatic cervical spinal stenosis.

Observation:

  • Two cases of cervical spinal stenosis caused by ossified ligamentum flavum are presented.
  • Case 1 involved diffuse ossification with dural adhesion, while Case 2 featured focal ossification without adhesion.

Findings:

  • Both patients underwent surgical decompression with successful removal of the ossified ligamentum flavum.
  • Neurological symptoms improved postoperatively in both cases.
  • The presence or absence of dural adhesion in ossified ligamentum flavum influences surgical approach and outcomes.

Implications:

  • Distinguishing between diffuse and focal ossified ligamentum flavum is crucial for surgical planning and predicting outcomes.
  • Understanding dural adhesion characteristics aids in preventing complications like liquorrhea during surgery.
  • This distinction can optimize surgical strategies for cervical spinal stenosis caused by ossified ligamentum flavum.