Items tagged “anatomy”

305 results found
Article

Eustachian valve

The Eustachian valve (also known as the "valve of the inferior vena cava") is a ridge of variable thickness in the inferior right atrium. It is a remnant of a fetal structure that directed incoming oxygenated blood to the foramen ovale and away from the right atrium.   Incomplete regression of ...
Article

Cervical spine ligaments

Cervical spine ligaments ordered from anterior to posterior include: anterior longitudinal ligament (ALL) anterior atlanto-occipital membrane apical ligament alar ligaments (paired) cruciate ligament of the atlas longitudinal band: joins the body of the axis to the foramen magnum transver...
Article

Flexor retinaculum

The flexor retinaculum (also known as the transverse carpal ligament) is a rectangular-shaped fibrous band located at the ventral aspect of the wrist. Gross anatomy On the radial side, it attaches to the scaphoid tubercle and the ridge of the trapezium. On the ulnar side, it attaches to the pi...
Article

Arterial supply to the foot

Arterial supply to the foot can be divided into plantar and dorsal components. Plantar arterial supply Medial plantar artery branch off the posterior tibial artery smaller calibre vessel supplies the medial side of the foot, abductor hallucis and flexor digitorum brevis. provides the arter...
Article

Triquetrum

The triquetrum (os triquetrum) is one of the carpal bones and forms part of the proximal carpal row. Gross anatomy Osteology The triquetrum is wedge-shaped carpal bone located between the lunate and the pisiform. It has an oval facet for articulation with the pisiform. Articulations along w...
Article

Radiological anatomy

Anatomy encompasses the structure, position, and interrelation of any parts of an organism. Radiopaedia.org aims to eventually cover the entire human anatomy, particularly in relation to the practice of radiology. All articles use standard anatomic conventional nomenclature and the anatomic posi...
Case

Normal ileocaecal junction

 Diagnosis not applicable
Dr Matt A. Morgan
Published 27 Jan 2015
56% complete
FluoroscopyCTAnnotated image
Article

Anterior commissure

The anterior commissure (AC) is a transversely oriented commissural white matter tract that connects the two cerebral hemispheres along the midline. It is a very important anatomical landmark that connects different parts of the limbic system on both sides and plays a role in the interhemispheri...
Article

Agenesis of the right hepatic lobe

Agenesis of the right hepatic lobe is a rare variation in liver anatomy. Radiographic features absence of the right hepatic lobe absence of right hepatic artery, right portal vein, and right hepatic biliary system compensatory hypertrophy of the left hepatic lobe and caudate lobe possible r...
Article

Agenesis of the left hepatic lobe

Agenesis of the left hepatic lobe is a rare variation in liver anatomy. It is clinically asymptomatic and discovered during imaging or surgery. Radiographic features absence of the left hepatic lobe (left of the falciform ligament, Couinaud segments II and III) absence of left hepatic artery,...
Article

Oblique fissure

The oblique fissures (also called the major fissures or greater fissures) are bilateral structures in both lungs separating the lung lobes.  Gross anatomy Right oblique fissure The superior part of the right oblique fissure separates the right upper lobe from the right lower lobe and the infe...
Article

Ulna

The ulna (plural: ulnae) is one of the two long bones of the forearm. It is located medially in the supinated anatomic position. It has a larger proximal end and tapers to a smaller distal end (opposite to the radius).  Gross anatomy Prominent features of the ulna include: proximal: olecranon...
Article

Cloaca (urogenital)

The cloaca is the terminal portion of the hindgut. It is an embryonic structure (weeks 4-7) in which the distal ends of the gastrointestinal tract and urogenital system share a common channel. The most distal aspect of the cloaca is termed the cloacal membrane. The cloaca, or portions of it, ca...
Article

Conus artery

The conus artery is a small early branch off the right coronary artery (RCA) circulation. Gross anatomy Supply The artery has a variable distribution, but usually supplies a region of the anterior interventricular septum and the conus of the main pulmonary artery (hence its name). Variant an...
Article

Lenticulostriate arteries

The lenticulostriate arteries are a collection of small perforating arteries arising from the anterior part of the circle of Willis and supplying the basal ganglia.  They are divided into: medial lenticulostriate arteries lateral lenticulostriate arteries  There is, however, some confusion a...
Article

Obturator nerve

The obturator nerve is a large nerve arising from the lumbar plexus and the nerve of the medial compartment of the thigh. It arises from the anterior divisions of L2-4 in the lumbar plexus.  Gross anatomy Course Pelvis The nerve descends medial to psoas major to the obturator canal where it ...
Article

Anterior tibial artery

The anterior tibial artery is the main arterial supply of the anterior compartment of the leg.  Gross anatomy The anterior tibial artery arises from the popliteal artery in the popliteal fossa and continues distally as the dorsalis pedis artery. Course The popliteal artery usually divides at...
Article

Saphenous nerve

The saphenous nerve is the continuation of the deep division of the femoral nerve in the femoral triangle. Gross anatomy runs within the subsartorial canal, giving off an infrapatellar branch (it also contributes to the subsartorial nerve plexus) curves behind sartorius, appearing behind the ...
Case

Anconeus muscle

TR 613 / TE 14, 2...
 Diagnosis not applicable
Dr Matt A. Morgan
Published 03 Mar 2015
61% complete
MRIAnnotated image
Article

Supradiaphragmatic liver

Supradiaphragmatic liver has been reported as a very rare variant in liver morphology.  In this variant, liver tissue extends into the right hemithorax through an opening in the right hemidiaphragm. The tissue is connected to the right hepatic lobe by a pedicle. In one report, the caudate lobe ...

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