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carotid sinus; carotid bulb

Structure: - dilated area at the base of the internal carotid artery just superior to the bifurcation of the common carotid artery Function: - it contains baroreceptors which when stimulated cause vasodilation, slowing of the heart & a decline in blood pressure Innervation: - largely via the glossopharyngeal nerve (CN IX) - a minor component is from the vagus nerve (CN X) Afferents: - from the carotid sinus synapse in the nucleus solitarius Efferents: - extend to the nucleus ambiguous (parasympathetic nucleus) & to the rostral & caudal ventrolateral medulla (sympathetic nuclei).

Related

carotid body carotid sinus massage carotid sinus syndrome; carotid sinus hypersensitivity; carotid sinus syncope glossopharyngeal nerve (CN IX)

General

baroreceptor cardiovascular system structure

References

  1. Stedman's Medical Dictionary 26th ed, Williams & Wilkins, Baltimore, 1995
  2. Practial ECG Interpretation, Basci Electrocardiography & Cardiac Arrhythmias, T. Evans, M.D., UCSF, Ring Montain Press, 1998
  3. Wikipedia: Carotid sinus https://en.wikipedia.org/wiki/Carotid_sinus

Component-of

common carotid artery

Components

carotid body

Images

images related to carotid sinus