Items tagged “anatomy rewrite”
64 results
Article
Abducens nerve
The abducens nerve is the sixth cranial nerve (CN VI). It is a motor nerve responsible for abduction of the eye (TA: nervus abducens or nervus cranialis VI). It courses from the abducens nucleus, located in the dorsal pons, up to the cavernous sinus, via a long cisternal segment that is prone to...
Article
Cerebellum
The cerebellum, meaning "the little brain", sits at the base of the brain in the posterior cranial fossa below the tentorium and behind the brainstem.
Gross anatomy
The cerebellum has the following features:
three surfaces: anterior (petrosal), superior (tentorial), inferior (suboccipital)
...
Article
Brain arterial vascular territories
An understanding of brain arterial vascular territories is important in understanding stroke and complications from surgery and endovascular procedures.
Although one could be excused for thinking that within the brain, such a carefully organised organ, blood supply would be constant, the truth...
Article
Circle of Willis
The circle of Willis (COW) or circulus arteriosus is an arterial polygon (heptagon) formed as the internal carotid and vertebral systems anastomose around the optic chiasm and infundibulum of the pituitary stalk in the suprasellar cistern. This communicating pathway allows equalisation of blood-...
Article
Fallopian canal
The fallopian canal or facial nerve canal refers to a bony canal through which the facial nerve traverses the petrous temporal bone, from the internal acoustic meatus to the stylomastoid foramen.
There are three segments of the canal, corresponding to the segments of the facial nerve they cont...
Article
Hippocampus
The hippocampus (plural: hippocampi) or historically the cornu Ammonis, is an important component of the human brain, situated in the temporal lobe. It plays a role in information processing and the reproductive cycle and is involved in Alzheimer disease.
Gross anatomy
Location
The hippocampu...
Article
Intracranial arteries (variants)
Intracranial arterial variants, of which there are many, are collectively common. Their clinical significance may be variable but knowledge and recognition of these variants is fundamental, especially if surgical or endovascular treatments (e.g. for acute stroke, aneurysms or other vascular path...
Article
Muscles of mastication
The muscles of mastication can be divided into primary and secondary groups according to whether they connect the mandible directly to the skull or if they attach to other structures in the neck, e.g. hyoid, thyroid cartilage.
Primary
temporalis muscle
masseter muscle
medial pterygoid muscle...
Article
Pancreatic ducts
The exocrine pancreas drains into the gastrointestinal tract via the main and accessory pancreatic ducts. Several anatomical variations of the typical ductal drainage pattern exist, reflecting variations in the embryological development and fusion of the dorsal and ventral pancreatic buds 13,14....
Article
Rotator cuff interval
The rotator cuff interval is a triangular space between the tendons of subscapularis and supraspinatus and the base of the coracoid process.
Gross anatomy
The combination of the coracohumeral ligament and superior glenohumeral ligament has a complex relationship with the long head of biceps te...
Article
Superior orbital fissure
The superior orbital fissure is the communication between the cavernous sinus and the apex of the orbit. It is straddled by the tendinous ring which is the common origin of the four rectus muscles (extraocular muscles).
Gross anatomy
Boundaries
medial: body of sphenoid
superior: lesser wing ...
Article
Couinaud classification of hepatic segments
The Couinaud classification (French eponym: pronounced kwee-NO) is the most widely used system to describe functional liver anatomy. It is the preferred anatomy classification system as it divides the liver into eight independent functional units (termed segments) rather than relying on the trad...
Article
Internal acoustic canal
The internal acoustic canal (IAC), also known as the internal auditory canal or meatus (IAM), is a bony canal within the petrous portion of the temporal bone that transmits nerves and vessels from within the posterior cranial fossa to the auditory and vestibular apparatus.
Gross anatomy
The op...
Article
Internal carotid artery
The internal carotid artery (ICA) is one of the two terminal branches of the common carotid artery (CCA) which supplies the intracranial structures. The other terminal branch is the external carotid artery (ECA), which is somewhat larger in calibre than the ICA, and gives off several branches to...
Article
Cervix
The cervix or uterine cervix is the lower constricted segment of the uterus providing the passage between the uterus proper and the vagina.
Gross anatomy
The cervix is somewhat conical in shape, with its truncated apex directed posteriorly and inferiorly. The inferior aspect of the cervix pro...
Article
Eustachian tube
The Eustachian tube, also known as the pharyngotympanic tube or auditory tube, is the channel via which the tympanic cavity communicates with the nasopharynx.
Gross anatomy
It is ~36 mm in length and is directed downward, forward, and medially, forming an angle of about 45 degrees with the sag...
Article
Maxillary artery
The (internal) maxillary artery is the larger of the two terminal branches of the external carotid artery.
Origin and course
The maxillary artery's origin is behind the neck of the mandible, at first, it is embedded in the substance of the parotid gland. From there it passes anterior between ...
Article
Inferior anastomotic vein
The inferior anastomotic vein, also known as the vein of Labbé, is part of the superficial venous system of the brain.
Gross anatomy
The vein of Labbé is the largest venous channel on the lateral surface of the brain that crosses the temporal lobe between the Sylvian fissure and the transvers...
Article
Forceps minor
The forceps minor, also known as the anterior forceps, is a white matter fibre bundle which connects the lateral and medial surfaces of the frontal lobes and crosses the midline via the genu of the corpus callosum.
Article
Forceps major
The forceps major, also known as the posterior forceps, is a white matter fibre bundle that connects the occipital lobes from the splenium of the corpus callosum 3.