Inferior petrosal sinus

Of the Inferior petrosal sinus is located in the human skull. It is a blood stream that supplies the brain. Venous blood is transported in it.

What is the inferior petrosal sinus?

The inferior petrosal sinus is used to ensure the blood supply to the human brain. Together with many other blood conductors, it transports venous blood.

Important and vital messenger substances, oxygen and nutrients are transported in it. The bloodstream ensures that active ingredients can be brought to their destination from the producing organ in a few minutes and sometimes even seconds. The inferior petrosal sinus thus plays an important role in supplying organs and transporting active substances. It is located along the petrous bone inside the human skull. The temporal bone is also called the pars petrosa ossis temporalis. It is a section of bone that is located at the base of the temporal bone.

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The shape of the petrous bone resembles a pyramid. When looking sideways at the human skull, it is almost in the middle and therefore just behind the ear. The inferior petrosal sinus is located at the lower edge of the petrous pyramid. It runs parallel to the superior petrosal sinus. This is located at the top of the pyramid.

Anatomy & structure

There are cavities in the meninges, which are located in the skull. The meninges are the dura mater. It separates the brain from the bones of the skull. The cavities in it are important areas through which blood conductors can move their paths. This ensures that the blood supply to the brain runs smoothly.

There is a pool of blood from different areas in the cavities. These include the meninges, the eye socket and the brain area. From there, the blood flows out of the jugular foramen via the internal jugular vein in the back of the skull. This is a small opening in the posterior fossa. The superior and superior sagittal sinuses are also located there. They connect and from the Confluence they continue to flow as the transverse sinus. The transverse sinus continues ventrally to the posterior fossa and merges into the sigmoid sinus. From here there is a connection to the cavernous sinus via the inferior petrosal sinus. The inferior petrosal sinus runs along the upper edge of the petrous pyramid.

Function & tasks

The inferior petrosal sinus is an important blood vessel to ensure an adequate supply of the brain. In it, cells, hormones and blood plasma are transported to the site of action. The inferior petrosal sinus draws blood directly from the pituitary gland. The pituitary gland is a gland that produces important hormones. It plays a major role in the regulation of hormones.

The hormones it produces are used for growth, reproduction and the regulation of metabolism. They include, for example, oxytocin, vasopressin or prolactin. Even if the pituitary gland is supplied by four arteries, medical professionals like to use the inferior petrosine sinus to take blood when interfering with the head. The wall of the sinus is thinner, making it easier to access with less discomfort. In addition, there is venous blood in their blood, which allows the concentration of all messenger substances in the bloodstream to be better measured. In addition, important and vital active ingredients are supplied via the inferior petrosal sinus in the event of complaints or during a surgical procedure.

The heat regulation of individual organs and areas in the brain takes place via the various blood vessels. The inferior petrosal sinus thus plays an important role in regulating temperature. This is especially true of the central area within the skull.

Diseases

Blood vessels play a central role in cancer. Cancer cells that break away from a tumor are transported to a part of the body via them. You can develop new metastases. These in turn can lead to other organs being affected by tumor formation. The cancer can thus spread throughout the body via the transport route of the blood and make the disease significantly worse.

Thrombosis of the cranial nerves is one of the most common diseases affecting blood vessels in the brain. It is inflammation. These cause a susceptibility when a thrombus develops. This is a blood clot that forms inside the blood line. It prevents blood flow and causes congestion. The inferior petrosal sinus, like other blood conductors in the human brain, is prone to sinus vein thrombosis. It can be triggered by suppuration of the middle ear. The formation of the clot often goes unnoticed by the person affected. With further growth, blood congestion and feelings of tension arise.

This is felt as pressure in the head or as a headache. If the clot is not recognized, a stroke can occur. This is associated with a life-threatening condition as well as a series of failures in functional activities in various areas of the brain. It can lead to paralysis and permanent limitations in the cognitive and motor areas of the person concerned. Sinus vein thrombosis is a rare condition that is mostly diagnosed in middle-aged patients.

The thrombus can also be transported out of the brain via the various blood vessels. If it gets to the lungs, it can also block blood vessels there. This leads to an increased risk of pulmonary embolism. This is also classified as life-threatening.