Items tagged “pm”
206 results found
Article
Otic ganglion
The otic ganglion is one of four parasympathetic ganglia of the head and neck. It receives parasympathetic fibers from the glossopharyngeal nerve. It supplies the parotid gland with not just parasympathetic, but also sympathetic and sensory fibers that pass through the gland.
Gross anatomy
sma...
Article
Carotid canal
The carotid canal is a passage within the petrous temporal bone and transmits the internal carotid artery, internal carotid venous plexus, and sympathetic plexus. Its inferior opening is called the carotid foramen and is situated anteriorly to the jugular fossa and medially to the carotid plate....
Article
Parietal foramen
The parietal foramina are inconstant foramina on each side of the posterior aspect of the parietal bone near the sagittal suture and represent a normal anatomic variant. They transmit emissary veins, draining to the superior sagittal sinus, and occasionally a branch of the occipital artery. The ...
Article
Temporal bone
The temporal bone is situated on the sides and the base of the cranium and lateral to the temporal lobe of the cerebrum. The temporal bone is one of the most important calvarial and skull base bones.
Gross anatomy
The temporal bone is divided into several main parts/portions 1-3:
squamous pa...
Article
Mandibular fossa
The mandibular fossa or glenoid fossa is the smooth concave articular surface formed by both the squamous and petrous parts of the temporal bone. It forms the superior articular part of the temporomandibular joint and lodges the condyle of mandible.
Article
Styloglossus muscle
The styloglossus muscle is one of the extrinsic tongue muscles.
Summary
origin: the apex of the styloid process adjacent to the origin of the stylomandibular ligament, and deep fibers of the ligament itself
insertion: merges with the hyoglossus and inferior longitudinal muscle of the tongue
...
Article
Base of the skull
The base of the skull (or skull base) forms the floor of the cranial cavity and separates the brain from the structures of the neck and face. The skull base and vault collectively form the neurocranium.
Gross anatomy
The base of the skull is a bony diaphragm composed of a number of bones - fro...
Article
Anterior cranial fossa
The anterior cranial fossa constitutes the floor of the cranial vault which houses the frontal lobes of the brain.
Gross anatomy
Structures present in the midline of the anterior cranial fossa from anterior to posterior are:
groove for superior sagittal sinus
groove for anterior meningeal v...
Article
Middle cranial fossa
The middle cranial fossa is a butterfly-shaped depression of the skull base, which is narrow in the middle and wider laterally. It houses the temporal lobes of the cerebrum.
Gross anatomy
The middle cranial fossa can be divided into medial and lateral parts. In the medial part, the following s...
Case
Langerhans cell histiocytosis
Published
22 Mar 2014
81% complete
X-ray
CT
MRI
Article
Posterior cranial fossa
The posterior cranial fossa is the most posterior aspect of the skull base housing the brainstem and cerebellum.
Gross anatomy
The following structures are present from anterior to posterior:
internal acoustic meatus
foramen magnum
groove for superior petrosal sinus
jugular foramen
hypogl...
Case
Hydrosalpinx
Published
28 Mar 2014
80% complete
CT
Article
Air space nodule
An air space nodule is a small (few millimeters to 1 cm), ill-defined, nodular opacity that is often centrilobular in location and is non-specific, seen in many conditions. Commonly it represents a focal area of consolidation or peribronchiolar inflammation, and can indicate endobronchial spread...
Article
Interface sign (HRCT chest)
The interface sign is a feature seen on HRCT chest imaging and refers to the presence of irregular interfaces at the margins of pulmonary parenchymal structures or the pleural surface of the lung. It suggests interstitial thickening.
Case
Radiographic assessment of basilar invagination
Published
03 Apr 2014
65% complete
CT
Article
HRCT chest - expiration (protocol)
Expiratory high-resolution CT (HRCT) imaging corresponds to an additional CT acquisition performed as part of the HRCT chest protocol. It represents a scan performed with the patient on supine and images obtained at the end-expiration.
It is a useful method for detecting small airways obstruct...
Article
Complete tracheal rings
Complete tracheal rings are a rare, isolated tracheal or tracheobronchial anomaly resulting from abnormal cartilage growth, forming a complete ring and often causing airway stenosis.
Clinical presentation
Clinically, it manifests as respiratory distress in infants or mild symptomatic airway co...
Case
Giant cell tumor of bone
Published
13 Apr 2014
81% complete
CT
MRI
Article
Ring of fire sign (adnexa)
The ring of fire sign, also known as ring of vascularity, signifies a hypervascular lesion with peripheral vascularity on color or pulsed Doppler examination of the adnexa due to low impedance high diastolic flow 1.
This sign can be seen in:
corpus luteum cyst (more commonly)
ectopic pregnancy
Case
Subacute combined degeneration of a spinal cord
Published
13 Jul 2014
89% complete
MRI