Table of Contents
What is carotid body and sinus?
Carotid Sinus. The carotid sinus is a baroreceptor that senses changes in systemic blood pressure and is located in the adventitia of the carotid bulb of the internal carotid artery. Due to its location the carotid sinus is an intimately related but distinct organ from the carotid body.
Where are the carotid sinuses?
The carotid sinus is located at the bifurcation of the common carotid artery, which is found at the level of the thyroid cartilage, below the angle of the mandible and medial to the sternocleidomastoid muscle.
Is carotid body same as carotid sinus?
The carotid bodies are small (≈2 mm diameter in humans) sensory organs located near the carotid sinus at the bifurcation of the common carotid artery at the base of the skull. The aortic bodies are on the aortic arch near the aortic arch baroreceptors.
What is the sinus nerve?
The carotid sinus nerve, which is a branch of the glossopharyngeal nerve (cranial nerve IX), provides the sensory innervation to the carotid body. The cell bodies of the afferent neurons reside in petrosal ganglion. Both myelinated (A) and unmyelinated fibers (C) are found in the carotid sinus nerve.
What is external carotid artery?
The external carotid artery (ECA) is one of the two terminal branches of the common carotid artery that has many branches that supplies the structures of the neck, face and head. The other terminal branch is the internal carotid (ICA), which is somewhat larger than the ECA, which supplies the intracranial structures.
What is the function of the carotid sinuses quizlet?
The Carotid Sinus has a thin and sensitive Tunica Media that is sensitive to stretch in the wall of the artery. This stretch sends information to the brain to say what is happening in the blood vessel specifically about stretch. Baroreceptors are the nerve endings that transmit this information.
What is the carotid triangle?
The carotid triangle is one of the natural geometrical formations of the neck. The triangle is located anterolaterally on each side of the neck. It is comprised of various anatomical structures that are noted as theoretical borders.
Why is external carotid artery so called?
The external carotid artery is a major artery of the head and neck. It arises from the common carotid artery when it splits into the external and internal carotid artery. External carotid artery supplies blood to the face and neck….
| External carotid artery | |
|---|---|
| Precursor | 1 & 2. aortic arches |
| Source | common carotid artery |
What is the origin of the external carotid artery?
The external carotid artery begins at the bifurcation of the common carotid at the level of the superior border of the thyroid cartilage. It runs superiorly and posteriorly between the neck of the mandible and the lobule of the auricle. It gives off six branches before it divides into two terminating braches.
What is the function of carotid sinus?
The carotid sinus has dense innervation of many types of receptors that play a role in the control of blood pressure. Carotid sinus baroreceptor has a crucial role in the control of blood pressure and heart rate.
Where are baroreceptors located?
carotid sinus
Baroreceptors are spray-type nerve endings in the walls of blood vessels and the heart that are stimulated by the absolute level of, and changes in, arterial pressure. They are extremely abundant in the wall of the bifurcation of the internal carotid arteries (carotid sinus) and in the wall of the aortic arch.