What is a terminal segment?

What is a terminal segment?

The communicating segment, or terminal segment, or C7, of the internal carotid artery passes between the optic and oculomotor nerves to the anterior perforated substance at the medial extremity of the lateral cerebral fissure.

What is petrous segment?

Description. The petrous segment, or C2, of the internal carotid is that which is inside the petrous part of the temporal bone. This segment extends until the foramen lacerum. The petrous portion classically has three sections: an ascending, or vertical portion; the genu, or bend; and the horizontal portion.

Where is the Clinoid segment?

The clinoid segment, or C5, is another short segment of the internal carotid that begins after the artery exits the cavernous sinus at the proximal dural ring and extends distally to the distal dural ring, after which the carotid artery is considered ‘intra-dural’ and has entered the subarachnoid space.

What does right ICA mean?

Anatomical terminology. The internal carotid artery (Latin: arteria carotis interna) is located in the inner side of the neck in contrast to the external carotid artery.

What is ICA heart?

Near the region where the back of the jaw and neck meet, the carotid arteries branch into an external carotid artery (ECA) that supplies blood to the face and neck and an internal carotid artery (ICA) that supplies blood to the brain.

Is petrous ICA Intracranial?

Anatomically the ICA is divided into extracranial and intracranial parts. The intracranial part is further subdivided into petrous, cavernous, and cerebral parts [1,2]. Clinically they are described as anterior circulation of the brain. Atherosclerotic plaques are often located in C-ICA.

What are the 8 branches of the ECA?

The ECA is the main feeding vessel to the tissues of the head and neck region through its 8 branches, namely the superior thyroid artery (STA), ascending pharyngeal artery (APA), lingual artery (LA), facial artery (FA), occipital artery, posterior auricular artery (PAA), superficial temporal artery, and maxillary …

What is cavernous ICA?

Aneurysms arising from the cavernous portion of the internal carotid artery (ICA) may produce a variety of neurological deficits, primarily those related to vision, including diplopia from single or multiple oculomotor nerve pareses, decreased visual acuity from compressive or ischaemic optic neuropathy, corneal and …

What is PSV and EDV?

PSV = peak systolic velocity. EDV = end diastolic velocity.

What is normal PSV?

The normal PSV in adults is 100–180 cm/sec, and the normal EDV is 25–50 cm/sec (,29). The normal ratio of renal artery PSV to aortic PSV is less than 3.5 (,18,,30).