INTERNAL CAROTID Meaning and
Definition
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The internal carotid refers to a major artery in the neck that supplies blood to the brain. Specifically, it is one of the two main branches of the common carotid artery, with the external carotid being the other. The common carotid artery is located on both sides of the neck and is responsible for delivering oxygenated blood to the head and neck region. The internal carotid artery arises from the common carotid artery at the level of the upper neck, just above the larynx.
Upon entering the skull through an opening called the carotid canal, the internal carotid artery continues its course within the cranial cavity. It then travels upward, past the structures of the middle ear, before passing through the petrous portion of the temporal bone. Along this path, the internal carotid artery is surrounded by important anatomical landmarks such as the cavernous sinus, which houses cranial nerves and contributes to venous drainage.
The internal carotid artery is responsible for supplying blood to a large portion of the brain, including the anterior and middle cerebral arteries. These critical arteries then branch out further to deliver oxygen and nutrients to various regions of the brain, which are essential for its proper functioning. Due to its vital role in cerebral blood supply, any abnormalities or obstructions within the internal carotid artery may significantly impact brain health and potentially give rise to various neurological conditions. Thus, understanding the anatomy and function of the internal carotid artery is vital for medical professionals in diagnosing and treating cerebral vascular disorders.
Etymology of INTERNAL CAROTID
The word "internal carotid" is derived from two roots: "internal" and "carotid".
1. "Internal" comes from the Latin word "internus", which means inner or inside.
2. "Carotid" comes from the Greek word "karoeidēs", which means deep sleep or stupor. It is derived from "karos", meaning deep slumber or lethargy, and "eidēs", meaning resembling.
When combined, the term "internal carotid" refers to the inner or inside aspect of the carotid artery.
