Articles
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More than 200 results
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...
Article
Atypical ribs
Owing to their features, the first, eleventh and twelfth ribs are considered atypical ribs. Some authors also include the second and tenth ribs as atypical. Atypical features are summarized below:
first rib
strongest, broadest and most curved
tubercle at the inner border marks the attachment ...
Article
Anterior inferior cerebellar artery
The anterior inferior cerebellar artery (AICA) is one of three vessels that provides arterial blood supply to the cerebellum. It has a variable origin, course and supply, with up to 40% of specimens not having an identifiable standard AICA. The amount of tissue supplied by the AICA is variable (...
Article
Sinoatrial nodal artery
The sinoatrial (SA) nodal artery is the small artery that supplies the sinoatrial (SA) node of the heart (the pacemaker).
Gross anatomy
Origin
Right coronary artery in 60% of cases and the left coronary artery in 40% of cases.
Course
The artery turns posteriorly below the superior vena cav...
Article
Carotid bifurcation
The carotid bifurcation is the point at which the common carotid artery terminates. As it does so, it forms the internal and external carotid arteries which go on to supply the head and neck.
The height of the carotid bifurcation is noted to be highly variable in the literature. Most frequently...
Article
Crista galli
The crista galli is a thick, midline, smooth triangular process arising from the superior surface of the ethmoid bone, projecting into the anterior cranial fossa. It separates the olfactory bulbs, which lie on either side of it in the olfactory fossae of the cribriform plate. It serves as an ant...
Article
Paraphysis elements
The so-called paraphysis elements are embryonic structures which appears like a thin strand between telencephalon and the anterior portions of diencephalon 1. It is believed to be the structure which results in colloid cysts of the third ventricle.
Article
Coronary arteries
The coronary arteries arise from the aortic sinuses immediately distal (superior) to the aortic valve and supply the myocardium with oxygenated blood. The arteries branch to encircle the heart, covering its surface with a lacy network, perhaps resembling a slightly crooked crown.
Gross anatomy
...
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