What does superior petrosal sinus drain into?

What does superior petrosal sinus drain into?

The superior petrosal sinus is one of the dural venous sinuses and drains the cavernous sinus. It courses posterolaterally to drain into the sigmoid sinus at the continuation of the transverse sinus. It runs along the superior aspect of the petrous temporal bone.

Where is the superior petrosal sinus located?

temporal bone

The superior petrosal sinus is a small, narrow dural venous sinus found within the anterolateral margin of the tentorium cerebelli. It spans from the cavernous to the transverse sinus by coursing through a shallow groove on the superior border of the petrous part of the temporal bone.

Where does the superior and inferior petrosal sinus drain?

In type I, the inferior petrosal sinus drains directly into the superior jugular bulb. In type II, the inferior petrosal sinus drains into a communicating vein that links the superior jugular bulb to the deep cervical plexus. In type III, the poorly formed inferior petrosal sinus is represented by a plexus of veins.

Where is the inferior petrosal sinus?

The inferior petrosal sinuses are two small sinuses situated on the inferior border of the petrous part of the temporal bone, one on each side. Each inferior petrosal sinus drains the cavernous sinus into the internal jugular vein.

What drains the cavernous sinus?

The cavernous sinuses receive blood from the superior ophthalmic vein of the orbit, along with the superficial middle cerebral vein of the brain, and other sources. They drain through the transverse sinus, internal jugular vein, and facial vein.

Where does sigmoid sinus drain to?

jugular bulb
The sigmoid sinus courses along the floor of the posterior cranial fossa to enter the jugular foramen. It drains into the jugular bulb via which it connects with the internal jugular vein.

What is cavernous sinus?

The cavernous sinus is part of the brain’s dural venous sinus and contains multiple neuro-vasculatures. It is situated bilaterally to the sella turcica and extends from the superior orbital fissure anteriorly to the petrous part of the temporal bone posteriorly, and is about 1 cm wide and 2 cm long.

What drains into inferior petrosal sinus?

The inferior petrosal sinus is a paired cranial venous channel that drains the cavernous sinus, midbrain, cerebellum and inner ear. This dural venous sinus emerges from the cavernous sinus within the middle cranial fossa and drains into the internal jugular vein.

Are there two cavernous sinuses?

The left and right cavernous sinuses communicate by way of the anterior and posterior intercavernous sinuses. These vessels travel anteriorly and posteriorly (respectively) around the infundibulum of the pituitary gland, deep to the diaphragma sellae, between the layers of dura mater.

Which cranial nerve is most commonly affected in cavernous sinus syndrome?

Cavernous sinus syndrome (CSS) is a condition caused by any pathology involving the cavernous sinus which may present as a combination of unilateral ophthalmoplegia (cranial nerve (CN) III, IV, VI), autonomic dysfunction (Horner syndrome) or sensory CN V1- CN V2 loss.

What passes through sigmoid sulcus?

The sigmoid sinus courses along the floor of the posterior cranial fossa to enter the jugular foramen. It drains into the jugular bulb via which it connects with the internal jugular vein.
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Sigmoid sinus.

Which sinuses drain into sigmoid sinus?

petrosal sinuses
Cavernous sinuses further drain into both petrosal sinuses superiorly (into the sigmoid sinus) and inferiorly (into the internal jugular vein).

What runs in cavernous sinus?

The nerves of the cavernous sinus are the oculomotor nerve (CN III), trochlear nerve (CN IV), ophthalmic nerve (V1), maxillary nerve (V2), abducens nerve (CN VI), and the sympathetic plexus around the internal carotid artery.

Which nerve is damaged in cavernous sinus thrombosis?

Cavernous sinus thrombosis is associated with palsies of cranial nerves III, IV, V and VI, producing loss of corneal reflexes, ophthalmoplegia and hypesthesia over the upper part of the face.

What drains into cavernous sinus?

What drains into the straight sinus?

The straight sinus, also known as tentorial sinus or the sinus rectus, is an area within the skull beneath the brain. It receives blood from the inferior sagittal sinus and the great cerebral vein, and drains into the confluence of sinuses. Dural veins (Straight sinus labeled as ‘SIN.

Which nerve is first affected in a cavernous sinus thrombosis?

Chemosis results from occlusion of the ophthalmic veins. Lateral gaze palsy (isolated cranial nerve VI) is usually seen first since CN VI lies freely within the sinus in contrast to CN III and IV, which lie within the lateral walls of the sinus.

What nerve is first affected in cavernous sinus thrombosis?

Lateral gaze palsy (isolated cranial nerve VI) is usually seen first since CN VI lies freely within the sinus in contrast to CN III and IV, which lie within the lateral walls of the sinus.

What might be one of the earliest symptoms of cavernous sinus thrombosis?

One of the earliest symptoms of cavernous sinus thrombosis is a severe headache that gets worse even with pain medicine. The pain may feel sharp immediately or worsen over several days. The pain may feel especially pronounced around or behind one or both eyes.

What drains into sigmoid sinus?

Inconstant veins that drain into the sigmoid sinus include veins from the pons and medulla oblongata. The sigmoid sinus has anastomoses with the mastoid emissary and condylar emissary veins routinely.

What are the 4 dural venous sinuses?

There are seven paired (transverse, cavernous, greater & lesser petrosal, sphenoparietal, sigmoid and basilar) and five unpaired (superior & inferior sagittal, straight, occipital and intercavernous) dural sinuses.

Which sinus is most common site for thrombosis?

The dural sinuses are grouped into the sagittal, lateral (including the transverse, sigmoid, and petrosal sinuses), and cavernous sinuses. Because of its complex neurovascular anatomic relationship, cavernous sinus thrombosis is the most important of any intracranial septic thrombosis.

What two structures join the straight sinus?

Structure. The straight sinus is situated within the dura mater, where the falx cerebri meets the midline of tentorium cerebelli. It forms from the confluence of the inferior sagittal sinus and the great cerebral vein. It may also drain blood from the superior cerebellar veins and veins from the falx cerebri.

What are the 11 venous sinuses?

The dural venous sinuses (also called dural sinuses, cerebral sinuses, or cranial sinuses) are venous channels found between the endosteal and meningeal layers of dura mater in the brain.
Venous sinuses.

Can an MRI detect cavernous sinus thrombosis?

Cavernous sinus thrombosis is a clinical diagnosis. MRI with contrast is the imaging modality of choice to confirm its presence and to differentiate it from alternatives such as orbital cellulitis, which may have a similar clinical presentation.