Articles
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3,363 results found
Article
Recurrent artery of Heubner
Recurrent artery of Heubner, also known as the medial striate artery or long central artery, is the largest perforating branch from the proximal anterior cerebral artery (ACA) and is the only one routinely seen on angiography.
Gross anatomy
Origin and course
The origin is from the anterior ce...
Article
Crista terminalis
The crista terminalis is a smooth muscular ridge in the superior aspect of the right atrium, formed following resorption of the right valve of the sinus venosus. It represents the junction between the sinus venarum, the "smooth" portion of the right atrium derived from the embryologic sinus veno...
Article
Interarterial course of the right coronary artery
Interarterial course of the right coronary artery may occur if the right coronary artery (RCA) has an aberrant origin from the left coronary sinus. The interarterial course occurs because the artery passes between the ascending aorta and the pulmonary trunk.
It is an uncommon anatomic variant w...
Article
Calcaneonavicular coalition
Calcaneonavicular coalition is one of the two most common subtypes of the tarsal coalition, the other being talocalcaneal coalition. As with any coalition, it may be osseous (synostosis), cartilaginous (synchondrosis) or fibrous (syndesmosis).
Radiographic features
This type of coalition is mo...
Article
Sternoclavicular joint
The sternoclavicular joint is a synovial joint between the medial clavicle, manubrium and the first costal cartilage that joins the upper limb with the axial skeleton.
Gross anatomy
There are two non-congruent articular surfaces forming a saddle joint 3:
medial clavicle: larger of the two
c...
Article
Interrupted aortic arch
Interrupted aortic arch (IAA) is an uncommon congenital cardiovascular anomaly where there is a separation between the ascending and descending aorta. It can either be complete or connected by a remnant fibrous band. An accompanying large ventricular septal defect (VSD) and/or patent ductus arte...
Article
Talus
The talus (plural: tali 4), historically known as the astragalus, is a tarsal bone in the hindfoot that articulates with the tibia, fibula, calcaneus, and navicular bones. It has no muscular attachments and around 60% of its surface is covered by articular cartilage.
Gross anatomy
The talus h...
Article
Aortic valve
The aortic valve (AV) is one of the four cardiac valves. It is the semilunar valve that allows blood to exit the left ventricle (LV). It opens during systole and closes during diastole.
The valve has left, right, and posterior cusps, the bases of which attach around the valve orifice to a fibro...
Article
High division of the brachial artery
A high division of the brachial artery is an unusually proximal bifurcation of the brachial artery into its ulnar and radial branches in the upper arm.
It is an anatomical variant of the arterial branching pattern of the upper limb.
Description
In general, the brachial artery bifurcates into...
Article
Brachial artery
The brachial artery is the main supply of arterial blood to the arm, forearm, and hand.
Summary
origin: continuation of axillary artery distal to teres major
location: medial upper arm
supply: muscles of the arm, forearm, and hand
main branches: profunda brachii
terminal branches: radial ...
Article
Radius
The radius (plural: radii) is one of the two long bones present in the forearm, located laterally in the supinated anatomical position. It has a smaller proximal end and enlarges to a larger distal end (opposite to the ulna).
Gross anatomy
Osteology
The proximal radius comprises the articula...
Article
Scaphoid
The scaphoid, also known as the os scaphoideum (or historically as the navicular), is the largest of the proximal row of carpal bones and forms the radial portion of the carpal tunnel. It is important for stability and movement at the wrist and may be fractured after a fall onto a hyperextended ...
Article
Navicular
The navicular bone is found in the midfoot and is one of the tarsal bones. Its structure resembles that of a boat. It is the last bone of the foot to ossify fully 1.
Summary
location: lies within the medial aspect of the midfoot
relations: the talus bone, cuboid bone and the three cuneiform b...
Article
Accessory navicular
An accessory navicular is a large accessory ossicle that can be present adjacent to the medial side of the navicular bone. The tibialis posterior tendon often inserts with a broad attachment into the ossicle. Most cases are asymptomatic but in a small proportion, it may cause painful tendinosis ...
Article
Tarsal bones
The tarsal bones are the seven bones of the foot excluding the metatarsals and phalanges. They are collectively known as the tarsus. The seven bones are:
talus
calcaneus
navicular
cuboid
lateral cuneiform
intermediate cuneiform
medial cuneiform
There are several mnemonics for the tarsals.
Article
Retro-aortic left brachiocephalic vein
The retro-aortic left brachiocephalic vein is a rare vascular variant where the left brachiocephalic vein passes more inferiorly through the superior mediastinum, coursing inferior to the aortic arch and posterior to the ascending aorta to join the right brachiocepahilc vein forming the superior...
Article
Peroneal magnus artery
The peroneal magnus artery or peronea arteria magna (PAM) is a congenital variant of the arterial supply of the leg, where both the anterior and posterior tibial arteries are hypoplastic and a large dominant peroneal artery supplies the whole leg and foot. It is seen in up to 5% of people 1,3.
...
Article
Mendosal suture
The mendosal suture, also known as the accessory occipital suture, is a normal calvarial suture.
Gross anatomy
The suture extends through the occipital bone, lying superior to the occipitomastoid suture and inferomedial to the lambdoid suture. It closes in utero or in the first few days of lif...
Article
Skull sutures
There are many skull sutures, which is the name given to the fibrous joints formed where the bones of the skull meet. In general, sutures do not fuse until brain growth is complete, therefore allowing the skull to increase in size with the developing brain.
Gross anatomy
Skull sutures are fibr...
Article
Pubis
The pubis, together with the ilium and ischium, make up the innominate bone of the pelvis. These are individual bones in the young and unite to form one bone in adults, the principal union forming the fused acetabulum.
The pubis is the ventral part of the innominate bone and forms a median cart...
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