Related Experiment Video
Updated: May 25, 2026
12:10
Retzius-Sparing Robot-Assisted Radical Prostatectomy
Published on: May 19, 2022
The proatlas: a comprehensive review with clinical implications
Mitchel Muhleman1, Ordessia Charran, Petru Matusz
1Department of Anatomical Sciences, School of Medicine, St George's University, Grenada, West Indies.
Summary
The proatlas, an embryonic remnant, can cause C1 and foramen magnum abnormalities if it fails to fuse with the occipital bone. These anomalies may lead to neurological symptoms, often discovered after trauma.
Area of Science:
- Developmental biology
- Human embryology
- Anatomical variations
Background:
- The proatlas originates from the fourth occipital sclerotome in human embryos.
- Typically, it fuses with upper occipital sclerotomes to form the occipital bone.
- Incomplete fusion can result in persistent proatlas structures.
Purpose of the Study:
- To discuss the embryological development of the proatlas.
- To explore anomalies resulting from failed proatlas fusion.
- To present comparative anatomy and surgical techniques for related conditions.
Main Methods:
- Review of embryological development of the occipital region.
- Analysis of clinical presentations of proatlas segmentation abnormalities.
- Discussion of surgical interventions for neural and vascular compromise.
Main Results:
- Failure of proatlas fusion leads to bony masses at C1 and the foramen magnum.
- These abnormalities can cause a spectrum of symptoms, from mild to severe.
- Symptoms may remain latent until a traumatic event.
Conclusions:
- Proatlas anomalies are significant developmental variations with clinical implications.
- Understanding embryological origins is crucial for diagnosing and managing these conditions.
- Surgical techniques aim to decompress neural elements and restore vascular flow.
Related Concept Videos
01:29Chronic Pancreatitis II: Collaborative Care
The management of chronic pancreatitis is multifaceted, involving a comprehensive approach that includes thorough assessment, diagnostic testing, and a variety of management strategies.
Assessment:
Assessment:
01:21Aneurysm II: Clinical Manifestations and Diagnostic Studies
Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
01:26Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations
Renal calculi, commonly termed kidney stones, are crystalline solid masses that form in the kidneys but can occur at any point within the urinary system, encompassing the kidneys, ureters, bladder, and urethra.The pathophysiology of renal stones involves several key factors: supersaturation of the urine with stone-forming constituents, changes in urine pH, a decrease in urine volume, and the presence of substances that promote or inhibit stone formation.Supersaturation of Urine: This is the...
01:30Acute Pancreatitis II: Clinical Manifestations and Management
Acute pancreatitis presents a complex medical emergency characterized by rapid onset inflammation of the pancreas, demanding timely diagnosis and management to prevent complications. The condition primarily manifests through severe upper abdominal pain that often radiates to the back. This pain intensifies following the consumption of fatty foods. Accompanying symptoms such as nausea, vomiting, abdominal distention, fever, dyspnea, cyanosis, and jaundice can vary in intensity but significantly...
01:11Clinical Trials: Overview
Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
01:25Acute Pancreatitis I: Introduction
Acute pancreatitis is the sudden inflammation of the pancreas caused by the early activation of digestive enzymes, leading to the autodigestion of pancreatic tissue. This results in local inflammation and, in severe cases, systemic complications.EtiologyUnderstanding the underlying causes is crucial, as identifying the etiology guides treatment and anticipates complications. Acute pancreatitis can be triggered by various factors, typically grouped into the following clinical categories.Biliary...