Where does posterior ethmoidal artery come from?
The posterior and anterior ethmoidal arteries typically arise from the third segment of the ophthalmic artery and course through the medial orbit before passing through the posterior and anterior ethmoidal canals, respectively, into the ethmoid air cells. The presence of the posterior ethmoidal artery is variable.
What is posterior ethmoid?
Anatomical terminology. The posterior ethmoidal artery is an artery of the head which supplies the nasal septum. It is smaller than the anterior ethmoidal artery.
What passes through posterior ethmoidal foramen?
The posterior ethmoidal foramen is a small opening in the ethmoid bone. It transmits the posterior ethmoidal artery, vein and nerve which supplies the posterior ethmoidal and sphenoid sinuses. The distance between the anterior and posterior ethmoidal foramina is 12 to 15 mm.
What do the anterior and posterior ethmoidal arteries supply?
The smaller of the two, the posterior ethmoidal artery, supplies the dura in the region of planum sphenoidale. The anterior ethmoidal artery gives origin to the falcine artery and supplies the dura of the medial and inferior portions of the anterior cranial fossa.
What does the posterior ethmoidal nerve supply?
The posterior ethmoidal nerve is a nerve of the orbit around the eye. It is a branch of the nasociliary nerve from the ophthalmic nerve (CN V1). It supplies sensation to the sphenoid sinus, the ethmoid sinus, and part of the dura mater in the anterior cranial fossa.
What artery supplies the upper lip?
Superior labial artery
Superior labial artery (old name: superior coronary artery) is one of the facial branches of the facial artery. It is bigger and more serpiginous than the inferior labial artery. It supplies the upper lip, including its labial glands, mucous membranes and muscles.
What does the posterior ethmoidal nerve innervate?
Function. The posterior ethmoidal nerve supplies sensation to the sphenoid sinus and the ethmoid sinus. It also supplies sensation to part of the dura mater in the anterior cranial fossa.
What is posterior ethmoid sinusitis?
Ethmoid sinusitis is the inflammation of a specific group of sinuses — the ethmoid sinuses — which sit between the nose and eyes. The ethmoid sinuses are hollow spaces in the bones around the nose. They have a lining of mucus to help prevent the nose from drying out.
What does the posterior ethmoidal artery supply?
The posterior ethmoidal artery is a branch of the ophthalmic artery. It supplies the posterior ethmoidal sinuses, dura and nasal cavity.
What do the ethmoidal arteries supply?
The internal ethmoidal arteries, which are branches of the rostral cerebral arteries, supply the most of the nasal conchae and nasal septum, unlike other animal species where the main blood supply for the nasal cavity arrives from the external ethmoidal arteries.
What does anterior ethmoidal nerve innervate?
The anterior ethmoidal nerve (see Fig. 11-8B) is one of the sensory branches of the ciliary ganglion, which is located within the orbital cavity and inaccessible to nerve blocks. It provides sensory innervation to the anterior portion of the nasal cavity.
What does anterior ethmoidal nerve do?
Function. The anterior ethmoidal nerve supplies sensation to the nasal septum. It also supplies sensation to part of the meninges. It is involved in the diving reflex.