Cranial fossa posterior. Medical search. FAQ

Cranial nerve palsy involving the four lower cranial nerves (IX-XII) is known as the Collet-Sicard Syndrome. (biomedcentral.com)
We report a case of a 24-year old woman with left-sided unilateral palsy of the four lower cranial nerves who had suffered a right sided occipital condyle fracture. (biomedcentral.com)

Lower cranial nerve (IX-XII) palsy is a rare condition with numerous causes, usually non-traumatic. (biomedcentral.com)
We based this article on a retrospective review of the medical record of a 24-year old woman admitted to our trauma center after being involved in a car accident and a review of the literature on occipital condyle fractures associated with lower cranial nerve palsy. (biomedcentral.com)
Months later she was diagnosed with palsy to cranial nerve IX-XII. (biomedcentral.com)
Lower cranial nerve palsy is a rare condition and its causes are numerous. (biomedcentral.com)
Furthermore lower cranial nerve palsy is attributed with occipital condyle fractures (OCF). (biomedcentral.com)
We therefore focus on this entity with regard to development of lower cranial nerve palsy. (biomedcentral.com)

Arachnoid cysts of the posterior fossa are rare lesions that are considered to be mostly congenital in origin. (cu.edu.tr)

Arachnoid cysts of the posterior cranial fossa may manifest themselves in several different ways. (cu.edu.tr)

These syndromes are caused by compression of a cranial nerve by an artery or vein at the zone of the nerve s entry to or exit from the brainstem. (aerzteblatt.de)
In the area of the root entry zone or root exit zone (REZ) of the relevant cranial nerve at the brainstem, the nerve comes into contact with a blood vessel usually an artery, less commonly a vein. (aerzteblatt.de)
The vertebral artery supplies a number of vital structures in the posterior cranial fossa , such as the brainstem, the cerebellum and the occipital lobes. (diki.pl)
The posterior cranial fossa houses the brainstem and cerebellum . (teachmeanatomy.info)
The posterior fossa is a small space in the skull, found near the brainstem and cerebellum. (medlineplus.gov)
The tumor was wrapped around almost every cranial nerve, an artery, and her brainstem. (kxan.com)
Researchers believe that in some cases the small posterior fossa may cause the developing brain, specifically the cerebellum and the brainstem, to be pushed downward. (rarediseases.org)

The posterior cranial fossa is part of the cranial cavity, located between the foramen magnum and tentorium cerebelli. (wikipedia.org)
Neuroradiological diagnosistics evaluate the severity of crowding of the neural structures within the posterior cranial fossa and their impact on the foramen magnum. (diki.pl)
Three openings of the posterior cranial fossa are located in the occipital bone, these are the foramen magnum, hypoglossal canal, and condylar canal. (anatomynext.com)
The foramen magnum is the largest opening in the skull base connecting the posterior cranial fossa with the external cranial base. (anatomynext.com)
The foramen magnum transmits the lower end of the medulla oblongata, the vertebral artery, the spinal root of the accessory nerve and the anterior and posterior spinal arteries. (anatomynext.com)
A large opening, the foramen magnum, lies centrally in the floor of the posterior cranial fossa. (teachmeanatomy.info)
Posterolaterally to the foramen magnum lies the cerebellar fossae . (teachmeanatomy.info)
Morphometric measurements like anterio-posterior diameter, transverse diameter were measured and Foramen magnum index was calculated. (ijars.net)
The Knowledge of size and shape of foramen magnum is helpful to neurosurgeons in cranio-vertebral surgical approaches as well as in posterior cranial fossa surgeries. (ijars.net)
Prominent features of posterior part of inferior surface are the foramen magnum and associated occipital condyles, jugular foramen, mastoid notch and the squamous part of the occipital bone up to the external occipital protuberance and the superior nuchal lines, hypoglossal canals (anterior condylar canals) and condylar canals (posterior condylar canals) (1) . (ijars.net)
The foramen magnum is situated in an anterio-median position in the occipital bone and communicates into the posterior cranial fossa. (ijars.net)
Basilar process of the occipital bone forms the anterior border, right and left ex-occipitalis form the lateral margin and supraoccipital part of occipital bone form the posterior border of foramen magnum (2) . (ijars.net)
Area around foramen magnum tends to withstand the physical insult because of thick cranial base and protected anatomical position (3) . (ijars.net)
The knowledge of the dimensions and shape of the foramen Magnum has important clinical implications in the prognosis and treatment of various neurological pathologies like Arnold Chiari syndrome, and posterior cranial fossa lesions (10) . (ijars.net)
Surgery on anterior foramen magnum meningiomas using a conventional posterior suboccipital approach: a report on an experience with 17 cases. (nih.gov)
The cranial dura mater is continuous through the foramen magnum (15) with that which covers the spinal cord. (stanford.edu)
Below the foramen magnum the dura is fused with the posterior atlantooccipital membrane (16) so that above the level of the atlas no epidural space is present. (stanford.edu)
The spinal cord passes through the foramen magnum, a centrally located opening in the posterior fossa. (wisegeek.com)
Meningiomas of the craniocervical junction may originate from the clivus, the cerebellopontine angle, or the occiput and extend into the spinal canal across the foramen magnum (craniocervical meningiomas) or may originate in the spinal canal and grow rostrally into the cranial cavity (spinocranial meningiomas) (3). (c3.hu)

These pass along the articulation between the posterior edge of the petrous temporal and the anterior edge of the occipital bones to the jugular foramen where the sigmoid sinus becomes the internal jugular vein. (wikipedia.org)
The hiatus for lesser petrosal nerve receives the lesser petrosal nerve as it branches from the glossopharyngeal nerve (CN IX) before the glossopharyngeal enters the posterior cranial fossa through the jugular foramen. (diki.pl)
The jugular foramen forms bilaterally between the occipital and temporal bones in the posterior cranial fossa and leads to the external surface of the cranial base. (anatomynext.com)
It has been found that the region of asterion has an average distance value of 19.9 mm to internal acoustic meatus (MI), 31.7 mm to posterior clinoid process (PC), 34.4 to dorsum sellae (DS), 19.2 mm to jugular foramen (FJ), 23.0 mm to hypoglossal canal (HC), internally. (ksbu.edu.tr)
Magnetic resonance imaging (MRI) with gadolinium showed a 4-cm left-sided tumor of the posterior cranial fossa adjacent to the medial wall of the jugular foramen, with extension into the jugular foramen and likely occlusion of the sigmoid sinus (figure 2, A and B). Four-vessel cerebral angiography revealed a tumor blush in the jugular foramen (figure 3). (thefreelibrary.com)

The intermediate nerve reaches the posterior cranial fossa via the internal acoustic meatus before synapsing in the solitary nucleus. (diki.pl)
The internal acoustic meatus is an oval opening in the posterior aspect of the petrous part of the temporal bone. (teachmeanatomy.info)

This is the most inferior of the fossae. (wikipedia.org)
The posterior part of the inferior surface of the skull is formed by the occipital bone. (ijars.net)
The deep suboccipital muscles including the rectus capitis posterior major (RCPma), rectus capitis posterior minor (RCPmi), obliquus capitis superior (OCS),and obliqus capitis inferior (OCI), located between the inferior nuchal line of the occipital bone and the dorsal aspect of the axis, are indispensable in maintaining head posture and in proprioception. (thefreedictionary.com)
The posterior triangle is divided by the inferior belly of the omohyoid muscle into an occipital triangle superior to it and a supraclavicular triangle inferior to it (fig. 50-2 C). (dartmouth.edu)
At MRI exam heterogenous cystic structure measuring 40 * 25 * 15 mm at inferior portion of brain posterior fossa extending to upper cervical canal at C1 and C2 level was detected which resulted in compression on medulla and upper cervical cord. (scirp.org)
The base of skull , also known as the cranial base or the cranial floor , is the most inferior area of the skull . (wikipedia.org)

Cerebrospinal fluid leakage remains a significant cause of morbidity following posterior fossa surgery , and its treatment remains a difficult problem. (bvsalud.org)

Posterior fossa meningiomas represent a common yet challenging clinical entity. (thejns.org)
Resection can be undertaken for posterior fossa meningiomas, but residual or recurrent tumor is frequent. (thejns.org)
Stereotactic radiosurgery (SRS) has been used to treat meningiomas, and this study evaluates the outcome of this approach for those located in the posterior fossa. (thejns.org)
Stereotactic radiosurgery affords a high rate of tumor control and neurological preservation for patients with posterior fossa meningiomas. (thejns.org)
Meningiomas of the basal posterior fossa. (nih.gov)
Posterior fossa meningiomas: surgical experience in 161 cases. (nih.gov)
Conventional posterior fossa approach for surgery on petroclival meningiomas: a report on an experience with 28 cases. (nih.gov)
The evolution of surgical approaches for posterior fossa meningiomas. (nih.gov)
Seizures are the most common symptom associated with cranial meningiomas, appearing in 30 to 40% of patients pre-treatment. (brainsciencefoundation.org)
Complications were encountered in 30% of patients, predominantly with recurrent and/or infiltrative or en plaque meningiomas. (c3.hu)

The floor of the cranial cavity is divided into three distinct depressions. (teachmeanatomy.info)
Identify the features of the cranial cavity and meninges. (umich.edu)
In certain areas the true dura forms folds that extend into the interior of the cranial cavity as the falx cerebri (N97) and falx cerebelli (N97) and the tentorium cerebelli (N97). (unmc.edu)
Deep within the head lies the floor of the cranial cavity, which contains the brain. (mdanderson.org)
The middle part of the anterior cranial fossa forms the roof of the nasal cavity, whereas the outer parts of the anterior cranial fossa form the roofs of the orbits. (mdanderson.org)

Computerized tomography scanning and magnetic resonance imaging revealed extensive craniofacial and vertebral abnormalities, including aplasia of the floor of the left middle fossa and posterior fossa cranium, articulation of the left mandibular condyle with the left temporal lobe, and progressive development of a Chiari I malformation with associated syringomyelia. (biomedsearch.com)
Chiari malformations are a group of complex brain abnormalities that affect the area in lower posterior skull where the brain and spinal cord connect. (rarediseases.org)

The base or floor of the posterior cranial fossa is formed by the occipital bone, the posterior surface of the petrosal part of the temporal bone, and the mastoid angle of the parietal bone. (anatomynext.com)
The posterior cranial fossa is comprised of three bones: the occipital bone and the two temporal bones. (teachmeanatomy.info)
The posterior fossa, or posterior cranial fossa , is the deepest and largest and is defined by the occipital bone of the skull. (wisegeek.com)

No special clinical presentation was associated with a very small posterior cranial fossa, which may indicate that a small posterior cranial fossa per se has little or no clinical significance, although it may be the primary developmental anomaly. (springer.com)

In children, approximately 65% to 75% of ependymomas arise in the posterior fossa. (cancer.gov)
Approximately one-half of AT/RTs arise in the posterior fossa. (cancer.gov)
Approximately one-half of all AT/RTs arise in the posterior fossa, although it can occur anywhere in the CNS. (cancer.gov)

An underdeveloped posterior cranial fossa can cause Arnold-Chiari Malformation. (wikipedia.org)

fossa cranii posterior ) lies at the lowest level of the internal cranial base and is the largest of the three cranial fossae. (anatomynext.com)

The inner acoustic meatus is a paired canal connecting the posterior cranial fossa and the facial canal. (anatomynext.com)
Headaches can be generally subdivided into primary headaches, secondary headaches, and cranial neuralgias/central and primary facial pain. (renalandurologynews.com)
Cranial neuralgiasare head and facial pain disorders that are short in duration but have severe pain in an anatomic distribution of the affected cranial nerve. (renalandurologynews.com)

In the patients, there was a positive correlation between posterior fossa size and the degree of the cerebellar ectopia, which might indicate that a posterior cranial fossa which was originally too small had been expanded by the herniation of hindbrain structures at an early stage. (springer.com)
Pyramidal signs and cerebellar symptoms and signs, which may be due to compression of neural structures, were associated with a large degree of ectopia and a relatively large posterior cranial fossa. (springer.com)
Syringomyelia and headache, which may be due to the valve action of the herniated cerebellar tissue, were not associated with a particularly large posterior fossa or herniation. (springer.com)
The doc's term for it was, 'Blunt-force trauma to the posterior cranial fossa , resulting in cerebellar herniation and damage to the midbrain. (diki.pl)
They may also occur in parasellar region or posterior fossa and cerebellar vermis . (scirp.org)
Cranial CT showed an ill defined mass in the right cerebellar hemisphere, causing obstructive hydrocephalus. (bmj.com)

It transmits the medulla of the brain, meninges, vertebral arteries, spinal accessory nerve (ascending), dural veins and anterior and posterior spinal arteries. (teachmeanatomy.info)
There are several arteries that supply the dura in the anterior , middle , and posterior cranial fossae 1,2 . (radiopaedia.org)
If too much tension is allowed on structures in the posterior cranial fossa the vertebral arteries will tear. (unmc.edu)

Occipital condyles are oval shape and lie obliquely so, its anterior end lies nearer to the midline than its posterior end. (ijars.net)
The dura is cut along the length of the petrous temporal ridges toward the midline and then the attachments to the anterior and posterior clinoid processes are cut loose. (unmc.edu)
The sella turcica is a depression in the midline of the sphenoid bone, an irregular shaped bone at the cranial floor. (mdanderson.org)

4 ] Children with posterior fossa ependymomas may present with signs and symptoms of obstructive hydrocephalus caused by obstruction at the level of the fourth ventricle. (cancer.gov)
In this case of chronic aseptic meningitis after posterior fossa surgery, closure of the pseudomeningocele found at exploratory surgery led to resolution of the symptoms. (bmj.com)

A literature search was carried out in PubMed with the following search terms: neurovascular compression syndrome, cranial neuralgia, trigeminal neuralgia, hemifacial spasm, glossopharyngeal neuralgia, vestibular nerve compression, vestibular paroxysmia, intermedius neuralgia and microvascular decompression. (aerzteblatt.de)
Trigeminal neuralgia is the most common neurovascular compression syndrome in the posterior fossa, with an incidence of 4 5 cases per 100 000 persons per year (among persons over age 60: up to 20 per 100 000 persons per year ) ( 3 , 4 ). (aerzteblatt.de)
The supraorbital nerve is a branch of the frontal nerve arising from the ophthalmic division of the trigeminal nerve (cranial nerve V). The foramen sits on the inmost, lower margin of a grove splitting the supraorbital ridge into a central and two distal sections. (wikipedia.org)
Annexin A6 controls neuronal membrane dynamics throughout chick cranial sensory gangliogenesis Cranial sensory ganglia are components of the peripheral nervous system that possess a significant somatosensory role and include neurons within the trigeminal and epibranchial nerve bundles. (tripdatabase.com)
Annexin A6 is expressed in chick trigeminal and epibranchial placode cell-derived neuroblasts and neurons, but its function in cranial ganglia formation has not been elucidated. (tripdatabase.com)

There are several bony landmarks and foramina present in the posterior cranial fossa (a foramen is simply a hole that allows the passage of a structure - usually a blood vessel or nerve). (teachmeanatomy.info)
Fig 1.1 - The bony landmarks and foramina of the posterior cranial fossa. (teachmeanatomy.info)
On 70 head-halves, a needle about 2 mm with diameter was placed on the centre point of asterion (posterolateral fontanel) by inserting into the whole cranial bony tissue by forming an right angle with the bony surface. (ksbu.edu.tr)
The central compartment of the skull base (middle cranial fossa) contains the sella turcica, a saddle-shaped bony structure in the skull base where the pituitary gland is located. (hopkinsmedicine.org)

Axial (horizontal) CT of the left temporal bone showing the full defect of the posterior cranial fossa. (lww.com)

The mastoid foramen leads from the posterior cranial fossa to the external cranial base and transmits the mastoid emissary vein, a small branch of the occipital artery, and the posterior meningeal artery. (anatomynext.com)
The most important contents of the posterior triangle are the accessory nerve (cranial nerve XI), brachial plexus, third part of the subclavian artery, and lymph nodes. (dartmouth.edu)

A total of 31 paediatric patients with a posterior cranial fossa brain tumour were identified over the study period. (springer.com)

Glossopharyngeal neuralgia is rarer, with pain localised to the posterior tongue, throat and ear canal. (gponline.com)

In the case of epidural hematoma in the posterior cranial fossa , the herniation is tonsillar and causes the Cushing's triad: hypertension, bradycardia, and irregular respiration. (diki.pl)
As the posterior fossa is a relatively small and nonexpandable space, hemorrhage or edema can lead to rapid compression and compromise of vital medullary functions, obstructive hydrocephalus, or herniation of the medullary tonsils. (medscape.com)

There is limited space in the posterior fossa, and the tumor can easily press on delicate structures if it grows. (medlineplus.gov)

She presented for elective craniotomy to remove the mass while preserving cranial nerve function. (hindawi.com)

If a tumor grows in the area of the posterior fossa, it can block the flow of spinal fluid and cause increased pressure on the brain and spinal cord. (medlineplus.gov)
After removal of the calvaria and posterior wedge, the coverings of the brain and spinal cord, the meninges (N94), can be seen. (unmc.edu)

The purpose of this study was to determine the localization of the asterion according to the anatomical landmarks of posterior cranial fossa and its relation with sinuses for posterolateral surgical approaches in newborns. (ksbu.edu.tr)

He was started on dexamethasone and underwent a posterior fossa craniotomy for total removal of a low grade astrocytoma. (bmj.com)

July 16: MoemKate (Kay) is having Cranial Cervical Fusion (CCF). (asap.org)
July 21: zippypnhd (Sherri) is having Cranial Cervical Fusion (CCF). (asap.org)
June 9: chairimom's daughter Katlyn had a PFD and, after a short recovery period, a cranial cervical fusion (CCF). (asap.org)
July 8: hedzap had invasive cervical traction followed by Cranial Cervical Fusion (CCF). (asap.org)

They may also present with ataxia, neck pain, or cranial nerve palsies. (cancer.gov)
He has residual cranial nerve palsies on the right side and experiences tremors, ataxia and disequilibrium. (nottingham.ac.uk)
Whereas motor weakness and gait ataxia tended to improve postoperatively, cranial nerve deficits usually remained unaltered. (c3.hu)

In cases of posterior cranial fossa hematoma, surgical drainage may be lifesaving if no additional pathologies are present. (medscape.com)

The anterior cranial fossa supports the frontal lobes of the brain. (mdanderson.org)

This study proposes a variation of the transorbital endoscopic approach (TOEA) that uses the lateral orbit as the primary surgical corridor, in a minimally invasive fashion, for the posterior fossa (PF) access. (thejns.org)

Aseptic meningitis is a recognised complication after posterior fossa surgery. (bmj.com)
Aseptic meningitis is a syndrome defined by pyrexia and signs of meningism associated with CSF pleocytosis, increased CSF protein, and sterile blood and CSF culture It is a recognised complication of posterior fossa surgery and is usually short lived. (bmj.com)

The p75 neurotrophin receptor regulates cranial irradiation-induced hippocampus-dependent cognitive dysfunction Cognitive deficits, characterized by progressive problems with hippocampus-dependent learning, memory and spatial processing, are the most serious complication of cranial irradiation. (tripdatabase.com)

Also visible in the posterior cranial fossa are depressions caused by the venous sinuses returning blood from the brain to the venous circulation: Right and left transverse sinuses which meet at the confluence of sinuses (marked by the internal occipital protuberance). (wikipedia.org)
The transverse sinuses pass horizontally from the most posterior point of the occiput. (wikipedia.org)
By the guide of point asterion on newborns the area of 1cm2 on this point which was placed on superior 4 squares of our scale diagram is suggested as a safe area of placement of first burr hole to avoid from the risk of bleeding of sigmoid and transverse sinuses on craniotomies of posterior fossa. (ksbu.edu.tr)
The deep grooves in this fossa also contain the transverse sinuses and sigmoid sinuses. (wisegeek.com)

A Multi-Institution Prospective Trial of Reduced-Dose Craniospinal Irradiation (23.4 Gy) Followed by Conformal Posterior Fossa (36 Gy) and Primary. (oncolink.org)
The current standard for this patient population includes craniospinal irradiation (CSI) to 23.4 Gy with a boost to the entire posterior fossa (PF) to a total dose of 54-55.8 Gy followed by dose-intensive chemotherapy. (oncolink.org)
The need for decreasing toxicities from cranial irradiation in the pediatric population is of utmost importance. (oncolink.org)
All 14 children were treated with cranial irradiation. (aappublications.org)
All children with GH deficiency received cranial irradiation and chemotherapy. (aappublications.org)
In this study, male Sprague-Dawley (SD) rats received 10 Gy cranial irradiation. (tripdatabase.com)
Then, we evaluated the expression of p75NTR in the hippocampus after cranial irradiation and explored its potential role in radiation-induced synaptic dysfunction and memory deficits. (tripdatabase.com)

Third, Fourth, and Sixth Cranial Nerve Palsies in Pituitary Apoplexy Pituitary apoplexy (PA) often presents with acute headache and neuro-ophthalmic manifestations, including ocular motility dysfunction (OMD) from cranial nerve palsies (CNPs). (tripdatabase.com)

Left infratemporal fossa. (wikidoc.org)

Anatomy 27

Diseases 29

Analytical, Diagnostic and Therapeutic Techniques and Equipment 8

Information Science 1

Health Care 1