Cochlear aqueduct

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Aqueduct of cochlea
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Left temporal bone. Inferior surface. (Aquæductus cochleæ labeled at left, fifth from the top.)
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Identifiers
Latin Aquaeductus cochleae
MeSH D003052
TA A15.3.03.058
FMA 77822
Anatomical terms of bone

Medial to the opening for the carotid canal and close to its posterior border, in front of the jugular fossa, is a triangular depression; at the apex of this is a small opening, the aquaeductus cochleae (or cochlear aqueduct, or aqueduct of cochlea), which lodges a tubular prolongation of the dura mater establishing a communication between the perilymphatic space and the subarachnoid space, and transmits a vein from the cochlea to join the internal jugular vein.

Carotid canal

The carotid canal is the passageway in the temporal bone through which the internal carotid artery enters the middle cranial fossa from the neck. The canal starts on the inferior surface of the temporal bone at the external opening of the carotid canal. The canal ascends at first superiorly, and then, making a bend, runs anteromedially. The canal's internal opening is near the foramen lacerum, above which the internal carotid artery passes on its way anteriorly to the cavernous sinus.

Jugular fossa

The jugular fossa is a deep depression in the inferior part of the base of the skull. More specifically, it is located in the temporal bone, posterior to the carotid canal and the aquæductus cochleæ. It is of variable depth and size in different skulls; it lodges the bulb of the internal jugular vein.

Dura mater There are 4 processes of dura mater

Dura mater is a thick membrane made of dense irregular connective tissue that surrounds the brain and spinal cord. It is the outermost of the three layers of membrane called the meninges that protect the central nervous system. The other two meningeal layers are the arachnoid mater and the pia mater. The dura surrounds the brain and the spinal cord and is responsible for keeping in the cerebrospinal fluid. It is derived from neural crest cells.

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Related Research Articles

Internal jugular vein paired vein collecting the blood from the brain, the superficial parts of the face, and the neck

The internal jugular vein is a paired jugular vein that collects blood from the brain and the superficial parts of the face and neck. The vein runs in the carotid sheath with the common carotid artery and vagus nerve.

External jugular vein

The external jugular vein receives the greater part of the blood from the exterior of the cranium and the deep parts of the face, being formed by the junction of the posterior division of the retromandibular vein with the posterior auricular vein.

Common carotid artery

In anatomy, the left and right common carotid arteries (carotids) are arteries that supply the head and neck with oxygenated blood; they divide in the neck to form the external and internal carotid arteries.

Inferior petrosal sinus

The inferior petrosal sinuses are two small sinuses situated on the inferior border of the petrous part of the temporal bone, one on each side. Each inferior petrosal sinus drains the cavernous sinus into the internal jugular vein.

Jugular foramen

The jugular foramen is a large foramen (aperture) in the base of the skull. It is located behind the carotid canal and is formed in front by the petrous portion of the temporal bone, and behind by the occipital bone; it is generally larger on the right than on the left side.

Posterior triangle of the neck

The posterior triangle is a region of the neck.

Sigmoid sinus

The sigmoid sinuses, also known as the pars sigmoid, are venous sinuses within the skull that receive blood from posterior dural venous sinus veins.

Anterior jugular vein

The anterior jugular vein is a vein in the neck. It begins near the hyoid bone by the confluence of several superficial veins from the submandibular region.

Transverse sinuses

The transverse sinuses, within the human head, are two areas beneath the brain which allow blood to drain from the back of the head. They run laterally in a groove along the interior surface of the occipital bone. They drain from the confluence of sinuses to the sigmoid sinuses, which ultimately connect to the internal jugular vein. See diagram : labeled under the brain as "SIN. TRANS.".

Common facial vein

The Facial vein usually unites with the anterior branch of the Retromandibular vein to form the Common Facial Vein, which crosses the external carotid artery and enters the internal jugular vein at a variable point below the hyoid bone.

Retromandibular vein

The retromandibular vein, formed by the union of the superficial temporal and maxillary veins, descends in the substance of the parotid gland, superficial to the external carotid artery but beneath the facial nerve, between the ramus of the mandible and the sternocleidomastoideus muscle.

Occipital vein

The occipital vein begins as a plexus at the posterior aspect of the scalp from the external occipital protuberance and superior nuchal line to the back part of the vertex of the skull.

Petrous part of the temporal bone

The petrous part of the temporal bone is pyramid-shaped and is wedged in at the base of the skull between the sphenoid and occipital bones. Directed medially, forward, and a little upward, it presents a base, an apex, three surfaces, and three angles, and houses in its interior, the components of the inner ear. The petrous portion is among the most basal elements of the skull and forms part of the endocranium. Petrous comes from the Latin word petrosus, meaning "stone-like, hard". It is one of the densest bones in the body.

Lateral parts of occipital bone

The lateral parts of the occipital bone are situated at the sides of the foramen magnum; on their under surfaces are the condyles for articulation with the superior facets of the atlas.

Submental triangle

The submental triangle is a division of the anterior triangle of the neck.

Submandibular triangle

The submandibular triangle corresponds to the region of the neck immediately beneath the body of the mandible.

Carotid triangle

The carotid triangle is a portion of the anterior triangle of the neck.

Jugular venous arch

Just above the sternum the two anterior jugular veins communicate by a transverse trunk, the jugular venous arch, which receive tributaries from the inferior thyroid veins; each also communicates with the internal jugular.

Superficial cervical lymph nodes

The superficial cervical lymph nodes are lymph nodes that lie near the surface of the neck.

References

This article incorporates text in the public domain from page 144 of the 20th edition of Gray's Anatomy (1918)

The public domain consists of all the creative works to which no exclusive intellectual property rights apply. Those rights may have expired, been forfeited, expressly waived, or may be inapplicable.

<i>Grays Anatomy</i> English-language textbook of human anatomy

Gray's Anatomy is an English language textbook of human anatomy originally written by Henry Gray and illustrated by Henry Vandyke Carter. Earlier editions were called Anatomy: Descriptive and Surgical, Anatomy of the Human Body and Gray's Anatomy: Descriptive and Applied, but the book's name is commonly shortened to, and later editions are titled, Gray's Anatomy. The book is widely regarded as an extremely influential work on the subject, and has continued to be revised and republished from its initial publication in 1858 to the present day. The latest edition of the book, the 41st, was published in September 2015.