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.
More than 200 results
Article
Extrinsic muscles of the larynx
The extrinsic muscles of the larynx are groups of muscles that act on the larynx as a whole to alter its position. Functionally they can be described as two groups of muscles:
infrahyoid muscles: depressors of the hyoid and larynx which are innervated by various nerves from the ansa cervicalis)...
Article
Tegmen
The tegmen is the thin osseous plate that separates the middle cranial fossa from the tympanic and mastoid cavities of the temporal bone. It is comprised of two or three parts 1,2:
tegmen tympani (roof of the tympanic cavity)
tegmen mastoideum (roof of the mastoid cavity)
tegmen antri (roof o...
Article
Penis
The penis (plural: penises or, rarely, penes) is the external midline urinary and reproductive structure of the male urogenital system.
Please note that as per standard anatomic position, the penis is described with the flaccid phallus against the anterior abdominal wall, the dorsal surface con...
Article
Os epilunate
The os epilunate is an accessory ossicle of the wrist that lies at the dorsal surface of the lunocapitate articulation. For this reason it can be mistaken for a loose body within this articulation 1. Though quite rare, it has to be considered in the differential diagnosis of dorsal atraumatic wr...
Article
Supraoptic nucleus
The supraoptic nucleus (SON) contains neurosecretory cells that produce the hormone vasopressin/antidiuretic hormone (ADH).
Gross anatomy
The supraoptic nucleus is found in the medial area of the anterior hypothalamus, sitting superior to the optic tract 1.
The hormones travel down the axons...
Article
Branches of internal carotid artery (mnemonic)
Useful mnemonics to remember the branches of the internal carotid artery is:
A VIP'S COMMA
Calming Voices Make Intra-Operative Surgery Pleasurable And Almost Memorable
Carotid Vessels Mnemonic Instantly Offers Super Powers And Aids Memory
Mnemonics
A VIP'S COMMA
A: anterior choroidal arter...
Article
External capsule
The external capsule is a series of white matter tracts in the brain situated between the putamen and claustrum. It is composed of claustrocortical fibers dorsally and the combined mass of the uncinate fasciculus and inferior frontal occipital fasciculus ventrally.
Relationships
The lentiform ...
Article
Fibulotalocalcaneal ligament
The fibulotalocalcaneal ligament is part of the deep crural fascia and runs medially from the posteromedial border of the lateral malleolus (anterior malleolar groove) with two sheet-like laminae that insert on the superolateral surface of the calcaneus and the lateral tubercle of the posterior ...
Article
Extensor hallucis longus muscle
Extensor hallucis longus is a thin muscle in the anterior compartment of the leg between tibialis anterior and extensor digitorum longus.
Summary
origin: anterior surface of the middle half of the fibula and the adjacent interosseous membrane
insertion: the dorsal side of the base of the dist...
Article
Nail unit (anatomy)
The nail unit or nail apparatus refers to a group of distal digital structures involved in the function and support of the nail plate.
Gross anatomy
Structures of the distal phalanx composing the nail unit include 1:
nail plate
nail matrix
nail bed
periungual soft tissues
eponychium (cuti...
Article
Pulvinar (disambiguation)
Pulvinar may refer to:
pulvinar thalamic nuclei (classically involved in variant Creutzfeldt-Jakob disease, see pulvinar sign)
Haversian fat pad of the hip (which covers the central non-articular part of the acetabulum)
Article
Mesenchyme
Mesenchyme, or mesenchymal connective tissue, is a type of undifferentiated connective tissue. It is predominantly derived from the embryonic mesoderm, although may be derived from other germ layers, e.g. mesenchyme derived from neural crest cells (ectoderm).
The term mesenchyme is often used t...
Article
Fossula post fenestram
The fossula post fenestram is a sac-like evagination of connective tissue within the otic capsule just posterior to the oval window. The region around the fossula is one of the less common areas of predilection for otosclerosis.
It arises from the vestibule and is thus one of three extensions o...
Article
Right middle lobe bronchus
The bronchus intermedius divides into the right middle lobe bronchus and the right lower lobe bronchus.
Gross anatomy
The right middle lobe bronchus originates from the bronchus intermedius around 2.5 cm distal to the right upper lobe bronchus 1. It branches in an obliquely inferior, anterior ...
Article
Subclavian vein
The subclavian veins are the major veins that drain the upper limbs.
Gross anatomy
Origin and course
The subclavian vein is the continuation of the axillary vein as it crosses the lateral border of the 1st rib. It then arches cephalad, posterior to the medial clavicle before curving caudally ...
Article
Asterion
The asterion is the junction on the side of the posteroinferior calvarium where three sutures meet:
parietomastoid suture
occipitomastoid suture
lambdoid suture
It represents the site of the closed mastoid fontanelle. It is located at the posterior end of the parietotemporal suture, whereas ...
Article
Ocular external rotators
The ocular external (lateral) rotators are the extra-ocular muscles responsible for external rotation (extorsion) of the globe:
inferior oblique (primary function)
inferior rectus (secondary function)
Article
Calcar avis
Calcar avis is an elevation of white matter projecting from the medial wall of the occipital horn of the lateral ventricle. It is variably conspicuous, depending on how deep the calcarine sulcus is.
Gross anatomy
The calcar avis is located on the medial wall of the occipital horn, near the ju...
Article
Carotid space
The carotid space, the suprahyoid portion of which is also known as the poststyloid parapharyngeal space, is a deep compartment of the head and neck bound by the carotid sheath.
Terminology
The "carotid space" terminology was introduced by some radiologists to facilitate differential diagnosis...
Article
Parotid space
The parotid space is one of the deep compartments of the head and neck and, as the name suggests, is mostly filled with the parotid gland. It is the most lateral major suprahyoid neck space.
Gross anatomy
The parotid space is a roughly pyramidal space, the broad elongated base facing laterally...
Unable to process the form. Check for errors and try again.