What is meningohypophyseal trunk?

What is meningohypophyseal trunk?

The meningohypophyseal trunk, also known as the posterior trunk, is a branch of the C4 (cavernous) segment of the internal carotid artery. In contrast to the inferolateral trunk, it is almost always identified at autopsy.

What is inferolateral trunk?

The inferolateral trunk (ILT) of the internal carotid artery (ICA) is a branch that arises inferiorly from the C4 segment of the cavernous ICA. It provides blood supply to the 3rd, 4th, and 6th cranial nerves, as well as to the gasserian ganglion.

What does the superior hypophyseal artery supply?

The superior hypophyseal arteries supply the pituitary infundibulum and, through the pituitary portal system, supply the anterior pituitary gland. These arteries arise from the supraclinoid carotid and can be duplicated at times.

Where does inferior hypophyseal artery come from?

The inferior hypophyseal artery is a branch from the meningohypophyseal trunk, a branch of the C4 segment of the internal carotid artery. It is usually single on each side and divides into medial and lateral branches contributing to the inferior hypophyseal arterial circle.

Where is the ascending pharyngeal artery?

The ascending pharyngeal artery is the smallest branch of the external carotid artery. It is long, thin, and located deeply in the neck under other branches of the external carotid artery, and also under the stylopharyngeus. The internal carotid artery is a terminal branch of the common carotid artery.

What are the branches of the internal carotid artery?

The internal carotid artery (ICA) is a terminal branch of the common carotid artery….Segments

  • C1: cervical segment.
  • C2: petrous (horizontal) segment.
  • C3: lacerum segment.
  • C4: cavernous segment.
  • C5: clinoid segment.
  • C6: ophthalmic (supraclinoid) segment.
  • C7: communicating (terminal) segment.

What does the artery of pterygoid canal supply?

The artery of the pterygoid canal (Vidian artery) is the artery passing through the pterygoid canal to the auditory tube and surrounding area, giving pharyngeal branches.

What coils into the foramen Lacerum?

In the middle cranial fossa, the greater petrosal nerve passes medially to enter the foramen lacerum and fuses there with the deep petrosal nerve, forming the Vidian nerve or pterygoid nerve, which passes from the pterygoid canal to the pterygopalatine fossa (PPF).

What is an Infundibulum aneurysm?

An infundibulum (plural: infundibula) is a conical outpouching from an artery (usually intracranial), with a broad base narrowing to an apex from which a vessel originates. Unlike an aneurysm, an infundibulum is not believed to be a risk for rupture and subarachnoid hemorrhage.

What is a pituitary apoplexy?

Apoplexy means bleeding into an organ or loss of blood flow to an organ. Pituitary apoplexy is commonly caused by bleeding inside a noncancerous (benign) tumor of the pituitary. These tumors are very common and are often not diagnosed.

What artery supplies blood to the face?

The external carotid artery supplies blood to the face and neck.

Where is the occipital artery located?

The occipital artery arises in the neck anterior to the mastoid protuberance from the posterior aspect of the carotid. It branches from the carotid just a little above the facial artery (Fig. 17.1).