Where is Clival located?
A bone at the base of the skull, near the spine.
What does abducens mean?
Definition of abducens nerve : either of the sixth pair of cranial nerves that are motor nerves supplying the rectus on the outer and lateral side of each eye. — called also abducens.
What is below the clivus?
The lower clivus is the part from the glossopharyngeal nerve to the foramen magnum. This part is bounded anteriorly by the lower nasopharynx and retropharyngeal tissues, posteriorly by the vertebral artery and medulla, and laterally by the sigmoid sinus, jugular bulb, and cranial nerves IX to XII.
Why is it called abducens nerve?
The word “abducens” comes from the Latin “ab-“, away from + “ducere”, to draw = to draw away. The abducens (or abducens) operates the lateral rectus muscle that draws the eye toward the side of the head. The abducens nerve is also called the abducens nerve.
What is the function of the abducens nerve quizlet?
The abducens nerve controls the muscle that produce lateral eyeball movement.
What is clivus lesion?
Clival tumors are growths on the clivus, a portion of bone at the base of the skull. When clival tumors grow, they may invade and damage important nearby structures: cranial nerves, the internal carotid arteries and the brainstem, for example.
What is a clival fracture?
Clival fractures are uncommon skull base fractures resulting from high-energy cranial trauma and are usually associated with other skull vault fractures and brain injuries.
Where does the abducens nerve exit the skull?
The abducens nerve originates from neuronal cell bodies located in the ventral pons. These cells give rise to axons that course ventrally and exit the brain at the junction of the pons and the pyramid of the medulla.
What bone is the clivus part of?
The clivus is located in the midline area of the skull base. It is part of the cranium, formed by the basilar part of the occipital bone and the corpus ossis sphenoidalis.
Is the clivus part of the temporal bone?
Laterally, the clivus meets the petrous portion of the temporal bone at the petro-occipital fissure. Together, these three bones form the skull base and middle fossa floor. The entire region is lined with a double layer of dura consisting of the endosteal and periosteal layers.