The extensor digitorum longus is one of the four muscles in the anterior compartment of the lower leg. Its main action is to extend the lateral four … [Read more...]
Tibialis Anterior
The tibialis anterior muscle is a major anterior leg muscle whose main action is dorsiflexion and inversion of the foot (i.e., "toes to nose" and … [Read more...]
Anterior Leg Muscles
A commonly asked anatomy test question is what are the four muscles of the anterior leg? They are the tibialis anterior, extensor hallucis longus, … [Read more...]
Colon Injury – AAST Classification
The American Society for the Study of Trauma (AAST) grades colon injury according to severity and devascularization injury. The grades are as … [Read more...]
Rectal Injury – AAST Classification
The American Association for the Study of Trauma classifies rectal and rectosigmoid injuries into five grades based on severity and presence of … [Read more...]
Small Bowel Injury – AAST Classification
The American Association for the Study of Trauma has classified small bowel injury into five grades depending on severity and degree of … [Read more...]
Pancreas Injury – AAST Classification
The American Association for the Study of Trauma has classified pancreatic injury into five grades depending on the severity and location of … [Read more...]
Teres Minor
The teres minor muscle lies deep to the teres major muscle on the posterior thoracic wall but dorsal to the scapula. The main action of this muscle is … [Read more...]
Infraspinatus
The infraspinatus muscle is a deep muscle of the posterior thoracic wall. Its proximal attachment (origin) is the infraspinous process (of the … [Read more...]
Pectoralis Minor
The pectoralis minor muscle is a deep muscle on the anterior chest wall that functions to pull the scapula inferiorly and toward the chest wall. It … [Read more...]
Ventricular Septal Defect (VSD)
Ventricular septal defect is a not uncommon congenital abnormality that can occur alone or as part of various syndromes. The most common site of a VSD … [Read more...]
Subclavius
The subclavius muscle is a little known muscle that lies deep in the upper anterior chest wall. Its main action is to anchor the clavicle. Its … [Read more...]
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