What does auriculotemporal nerve innervate?
There are five main branches to the auriculotemporal nerve; the anterior auricular, articular, parotid, superficial temporal and branches to the external auditory meatus: The anterior auricular branch provides somatosensory innervation to the skin of the ear, including the tragus and part of the helix.
Where does the auriculotemporal nerve branch?
The auriculotemporal nerve is a branch of the mandibular nerve (CN V3) that runs with the superficial temporal artery and vein, and provides sensory innervation to various regions on the side of the head.
What artery splits the auriculotemporal nerve?
Gross anatomy The auriculotemporal nerve divides posteriorly from the posterior division of the mandibular division before dividing into two roots separate to encircle the middle meningeal artery just as it ascends to enter the foramen spinosum.
Which nerve surrounds the middle meningeal artery?
The middle meningeal artery is intimately associated with the auriculotemporal nerve, which wraps around the artery making the two easily identifiable in the dissection of human cadavers and also easily damaged in surgery.
What is middle meningeal artery?
The middle meningeal artery provides blood to the dura mater through and through its branching arteries also supplies the periosteum of the inner aspects of the cranial bones. [1] As the middle meningeal artery enters the dura mater, it follows a fixed course as it embeds into the groove of the inner skull face.
What does middle meningeal nerve supply?
The middle meningeal nerve, also known as the meningeal branch of the maxillary nerve, is a branch of the maxillary division of the trigeminal nerve. It supplies the dura of the middle cranial fossa.
What are the relationships of the epidural and subarachnoid spaces to the meninges?
Spinal Meninges The epidural space lies between the spinal dura mater and the periosteum of the vertebral canal. The subarachnoid space extends as a narrow slit between the arachnoid and the pia mater. The inner electron-dense cell layer of the arachnoid appears occluded and opens only around the spinal roots.
Is the middle meningeal artery epidural or subdural?
The middle meningeal artery has a number of clinical implications. Rupture of the artery, which most commonly occurs at the pterion, typically leads to an epidural hematoma. The resulting hematoma is described as a “lens-shaped” mass on a computed tomogram (CT) scan.
Where does middle meningeal artery pass through in the skull?
foramen spinosum
The middle meningeal artery is a large arterial branch of the maxillary artery which is a terminal branch of the external carotid artery. Upon originating, the middle meningeal artery passes through the foramen spinosum. In the skull, it courses in the middle cranial fossa where it provides several branches.
What separates the epidural and subarachnoid space?
DURAL SAC. The dural sac surrounds the spinal cord inside the vertebral column. It separates the epidural space from the subarachnoid space, ending at the second sacral vertebra.
What fills the subarachnoid space?
The subarachnoid space consists of the cerebrospinal fluid (CSF), major blood vessels, and cisterns. The cisterns are enlarged pockets of CSF created due to the separation of the arachnoid mater from the pia mater based on the anatomy of the brain and spinal cord surface.
What are the branches of middle meningeal artery?
Middle meningeal artery
| Origin | Maxillary artery |
|---|---|
| Branches | Accessory branch, frontal branch, orbital branch, parietal branch, petrosal branch, superior tympanic artery, anastomotic branch |
| Supply | Dura mater, cranial bones |
| Clinical importance | Epidural hematoma |
What cranial nerves are in Meckel’s cave?
Conclusions. Meckel’s cave contains the trigeminal nerve ganglion and proximal rootlets, situated between the prepontine cistern and the cavernous sinus.
What does the middle meningeal artery pass through?
The middle meningeal artery (MMA) normally branches off the maxillary artery, which is an extension of the external carotid artery. The artery will then travel through the foramen spinosum, which is posterolateral from the foramen ovale, to supply blood to the dura mater.
What spinal nerves are in the epidural space?
The dural sac contains the anterior and posterior spinal nerve roots, collectively know as the cauda equina.
What nerves run through the epidural space?
The epidural space contains fat, veins, spinal arteries, and lymphatics. The epidural veins are a part of the large internal vertebral venous plexus, which communicates with the occipital, sigmoid and basilar sinuses superiorly in the cranium.