Articles
Articles are a collaborative effort to provide a single canonical page on all topics relevant to the practice of radiology. As such, articles are written and continuously improved upon by countless contributing members. Our dedicated editors oversee each edit for accuracy and style. Find out more about articles.
3,363 results found
Article
Ligamentum teres hepatis (abdomen)
The ligamentum teres hepatis or round ligament is the fibrous cord formed by the obliterated fetal umbilical vein that runs in the free edge of the falciform ligament from the umbilicus into the left lobe of the liver.
Article
Caudate nucleus
Caudate nuclei are paired nuclei which along with the globus pallidus and putamen are referred to as the corpus striatum, and collectively make up the basal ganglia. The caudate nuclei have both motor and behavioral functions, in particular maintaining body and limb posture, as well as controlli...
Article
Velum interpositum
The velum interpositum is a small membrane containing a potential space just above and anterior to the pineal gland which can become enlarged to form a cavum veli interpositi.
Gross anatomy
The velum interpositum is formed by an invagination of pia mater forming a triangular membrane the apex...
Article
Tongue
The tongue is a complex, principally muscular structure that extends from the oral cavity to the oropharynx. It has important roles in speech, swallowing and taste.
Gross anatomy
The tongue has a tip, dorsum, inferior surface and root. The tongue is made of a midline lingual septum and hyoglo...
Article
Choroidal fissure
The choroidal fissure, or choroid fissure, is a cleft of the medial surface of the cerebral hemisphere running immediately above the hippocampus and extends around the thalamus to the interventricular foramen of Monroe. It forms the medial wall of the lateral ventricle and attachment site for th...
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Anterior corticospinal tract
The anterior corticospinal tract is formed at the level of the of the medullary pyramids, where the majority (90%) of descending corticospinal tract fibers decussate to form the lateral corticospinal tract. The remaining non-decussating fibers (10%) form the much smaller anterior corticospinal t...
Article
Rathke pouch
Rathke pouch, also known as hypophyseal diverticulum, is an ectodermal outpouching of stomodeum (primitive oral cavity lined by ectoderm) which forms at approximately 3-4 weeks gestation and goes on to form the adenohypophysis of the pituitary gland.
Gross anatomy
The anterior wall of the pouc...
Article
Pituitary gland
The pituitary gland (a.k.a. hypophysis cerebri), together with its connections to the hypothalamus, acts as the main endocrine interface between the central nervous system and the rest of the body.
Gross anatomy
The pituitary gland sits atop the base of the skull in a concavity within the sph...
Article
Corticospinal tract
The corticospinal tract (also known as the pyramidal tract) is a descending white matter tract primarily concerned with motor function that extends caudally from the motor cortex to synapse with motor neurons of the spinal cord in the anterior horns.
Gross anatomy
Central connections
Cortico...
Article
Internal capsule
The internal capsule (TA: capsula interna) is a deep subcortical structure that contains a concentration of afferent and efferent white matter projection fibers. Anatomically, this is an important area because of the high concentration of both motor and sensory projection fibers 1,2. Afferent fi...
Article
Fornix (brain)
The fornix (plural: fornices) is the main efferent system of the hippocampus and an important part of the limbic system. It is one of the commissural fibers connecting the cerebral hemispheres.
Gross anatomy
Roughly C-shaped, the fornix extends from the hippocampus to the mammillary bodies of ...
Article
Mitral aortic intervalvular fibrosa
The mitral-aortic intervalvular fibrosa (MAIVF) refers to a thin, fibrous, membranous avascular region located between the anterior leaflet of the mitral valve (left atrioventricular orifice) and non-coronary cusp of the aortic valve in the heart.
It extends from the right fibrous trigone to th...
Article
Antihelix (ear)
The antihelix of the ear refers to the Y-shaped cartilage within the external ear, it lies next to the scapha of the ear, the ridge separating the helix from the antihelix.
Gross anatomy
The antihelix can be divided into two parts bifurcating around the triangular fossa1:
superior crus: upper...
Article
Meckel diverticulum
Meckel diverticulum is a congenital intestinal diverticulum due to fibrous degeneration of the umbilical end of the omphalomesenteric (vitelline) duct that occurs around the distal ileum. It is considered the most common structural congenital anomaly of the gastrointestinal tract.
Epidemiology
...
Article
Spinal nucleus of the trigeminal nerve
The spinal nucleus of the trigeminal nerve is one of three major nuclei that make up the trigeminal sensory nerve nuclear complex along with the main sensory nucleus and the mesencephalic nucleus 1,2.
Gross anatomy
The spinal nucleus of the trigeminal nerve is a paired structure and is an infe...
Article
Knee capsule
The knee capsule is a dual-layered structure that surrounds the knee joint. It is relatively thin anteriorly and posteriorly and thickened laterally by the collateral ligaments.
Gross anatomy
The outer layer of the knee capsule consists of fibrous connective tissue to hold the joint in place,...
Article
Subtalar joint
The subtalar joint may refer to one or two articulations:
the anatomical subtalar joint: posterior talocalcaneal articulation
the clinical subtalar joint: posterior talocalcaneal articulation and talonavicular joints
Please see the main articles for further descriptions of the separate joints...
Article
Arterial vasocorona
The arterial vasocorona is part of the spinal cord blood supply and is formed by pial anastomoses between the anterior and posterior spinal arteries on the surface of the spinal cord. It encircles the cord and supplies the peripheral lateral aspect of the spinal cord.
Engorgement of arterial v...
Article
Retroperitoneum
The retroperitoneum is the part of the abdominal cavity that lies between the posterior parietal peritoneum anteriorly and the posterior abdominal wall 4. It is C-shaped on axial cross-section with convexity projecting anteriorly in the mid-line.
Gross anatomy
The retroperitoneum is variably ...
Article
Empty sella
An empty sella, also known as an empty pituitary fossa, refers to the appearance of the sella turcica when the pituitary gland appears shrunken or invisible and CSF fills the space instead. It is commonly an incidental finding of no clinical significance, but there exists a well-established asso...
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