Related Experiment Video
Updated: Jan 24, 2026
04:57
Author Spotlight: Minimally Invasive Ultrasound-Guided Acupotomy in Knee Osteoarthritis Treatment
Published on: April 26, 2024
1.2K
Complex Chiari malformation: using craniovertebral junction metrics to guide treatment.
Winson S C Ho1, Douglas L Brockmeyer2
1Division of Pediatric Neurosurgery, Department of Neurosurgery, University of Utah School of Medicine Primary Children's Hospital, Salt Lake City, UT, USA.
Summary
Complex Chiari malformation involves abnormal bony anatomy at the craniocervical junction, including kyphosis and retroflexed odontoid. This study reviews craniocervical morphometrics and proposes a management algorithm for complex Chiari patients.
Area of Science:
- Neurosurgery
- Orthopedic Surgery
- Radiology
Background:
- Complex Chiari malformation is a recently defined entity.
- It involves abnormal craniocervical bony anatomy alongside Chiari tonsillar herniation.
- Key features include craniocervical kyphosis and retroflexed odontoid.
Purpose of the Study:
- To review background literature on Chiari craniocervical morphometrics.
- To provide an algorithm for managing complex Chiari patients.
- To enhance understanding of this complex neurological condition.
Main Methods:
- Literature review of craniocervical morphometrics in Chiari malformation.
- Analysis of radiographic measurements for craniocervical kyphosis and retroflexed odontoid.
- Development of a clinical management algorithm.
Main Results:
- Established radiographic measurements for craniocervical kyphosis and retroflexed odontoid.
- Detailed the complex Chiari malformation's anatomical characteristics.
- Outlined a structured approach to patient management.
Conclusions:
- Complex Chiari malformation requires specific attention to craniocervical bony anatomy.
- Radiographic morphometrics are crucial for diagnosis and management planning.
- A standardized management algorithm can improve patient outcomes.
Related Concept Videos
01:11P-N junction
1.2K
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
1.2K
01:19The Neuromuscular Junction
18.4K
The nervous system consists of complex motor neuron circuits, including upper motor neurons originating from the cerebral cortex and lower motor neurons starting in the spinal cord, coordinating both voluntary and involuntary movements. Among these, somatic motor neurons activate skeletal muscles and are classified into alpha, beta, and gamma types. Alpha neurons are vital for voluntary movement coordination, while gamma neurons adjust muscle spindle sensitivity, and the function of beta...
18.4K
01:03Anchoring Junctions
4.9K
Anchoring junctions are multiprotein complexes that help cells connect to other cells and the extracellular matrix. Anchoring junctions are present on the lateral and basal surfaces of cells, providing strong and flexible connections. Focal adhesions are often formed due to cell interactions with the ECM substrata, which initiate signal transduction via kinase cascades and other mechanisms. Together, they provide stability and tissue integrity. There are three types of anchoring junctions:...
4.9K
01:24Adherens Junctions
6.3K
Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types – adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
Adherens Junctions are Dynamic
6.3K
01:27Gap Junctions
9.4K
The cytoplasm of adjacent animal cells can exchange small molecules, ions, and secondary messengers via the communication channels which form the gap junctions. These junctions comprise a few hundred to thousands of molecular channels, each made of two halves, called the connexon hemichannel. A connexon is a hexamer of six transmembrane connexin proteins, which assemble radially, thus forming a pore or channel in the center. One connexon hemichannel docks with a corresponding connexon on the...
9.4K
01:37Gap Junctions
57.0K
Multicellular organisms employ a variety of ways for cells to communicate with each other. Gap junctions are specialized proteins that form pores between neighboring cells in animals, connecting the cytoplasm between the two, and allowing for the exchange of molecules and ions. They are found in a wide range of invertebrate and vertebrate species, mediate numerous functions including cell differentiation and development, and are associated with numerous human diseases, including cardiac and...
57.0K