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What is an alar foramen?
An alar foramen is the opening at either end of the alar canal, the bony canal through the basisphenoid bone of the skull, through which the maxillary artery and nerve run.
Does the optic nerve pass through the foramen ovale?
The natural blind spot (scotoma) is due to lack of receptors (rods or cones) where the optic nerve and blood vessels leave the eye. It is where the optic nerve leaves the retina not enter it. The optic disk or blind spot is where the optic nerve leaves the eye; you cannot use that field of vision because the optic nerve is there.
What is the gateway to the nasal cavity?
Naris (nostril) Cribriform plate (roof of the cavity) Sphenopalatine foramen (on lateral wall) Incisive canal (on cavity floor between nasal cavity & Palate)
What is Inside vertebrae?
Inside vertebrae, there is a central canal known as the vertebral foramen, which houses the spinal cord and its protective membranes. Surrounding the canal are the bony structures of the vertebrae, including the body, arch, and various processes. Additionally, the intervertebral discs, composed of cartilage, are located between adjacent vertebrae, providing cushioning and facilitating movement. The vertebrae also contain bone marrow, which is involved in blood cell production.
Where the inferior alveolar nerve travels?
The inferior alveolar nerve travels through the mandibular canal in the mandible, providing sensory innervation to the lower teeth and surrounding tissues. It branches off from the mandibular nerve, a division of the trigeminal nerve (cranial nerve V). As it descends, it gives off the mylohyoid nerve and continues into the mandibular foramen, where it enters the bone to supply the molars and premolars. The nerve exits the mandible through the mental foramen as the mental nerve, innervating the chin and lower lip.
Site of jugular foramen and carotid canal?
The jugular foramen is located at the base of the skull, between the occipital and temporal bones, posterior to the carotid canal. The carotid canal is situated in the petrous part of the temporal bone, just above the jugular foramen.
Name 2 passageways in the floor of skull for major blood vessels that serve the brain?
Jugular foramen and cartoid canal
Lateral pair of structures of foramen Magnum?
The lateral pair of structures at the foramen magnum are the jugular foramen and the hypoglossal canal. The jugular foramen allows passage of the internal jugular vein and glossopharyngeal, vagus, and accessory nerves, while the hypoglossal canal transmits the hypoglossal nerve.
Which bony foramen does the internal carotid artery run through?
The carotid canal. When viewed from a superior angle, the internal carotid may appear to be transmitted through the foramen lacerum; however, it is not. The foramen lucerum is actually covered by connective tissue and transmits NO vessels or nerves. Though there are many hypotheses as to the purpose of the foramen lucerum, there is no definitive answer.
Name 2 passageways in the floor of the skull for major blood vessels that serve the brain?
Jugular Foramen and Cartoid Canal
Through what cranial structure does the carotid artery pass as it enters the brain?
the carotid artery passes through the carotid canal to the brain
What artery travels through the carotid canal?
the internal carotid artery
What is a round or oval hole through a bone which contains blood vessels and nerves called?
vertebral foramen
What structures pass through the foramen ovale of sphenoid?
(From Wikipedia)The internal carotid artery passes superiorly from the carotid canal in the base of the skull, emerging via that part of the foramen lacerum which is not occluded by cartilage.The artery of pterygoid canal, the nerve of pterygoid canal and some venous drainage also pass through the foramen lacerum.The nerve of pterygoid canal comprises the deep petrosal nerve and the greater petrosal nerve the former carrying sympathetic fibres and the latter parasympathetic fibres of the autonomic nervous system to blood vessels, mucous membranes, salivary glands, and lacrimal glands.Furthermore, one of the terminal branches of the ascending pharyngeal artery (itself a branch of the external carotid artery) passes through the foramen lacerum. The ascending pharyngeal artery is one of three possible "meningeal branches" of this vessel.Lastly, some emissary veins pass through the foramen lacerum. These connect the extracranial pterygoid plexus with the intracranial cavernous sinus and present an unopposed route for infection.
What is an alar foramen?
An alar foramen is the opening at either end of the alar canal, the bony canal through the basisphenoid bone of the skull, through which the maxillary artery and nerve run.
What structures pass through the various foramen?
The foramen magnum transmits the spinal cord, accessory nerves, vertebral arteries, and the anterior and posterior spinal arteries. The superior orbital fissure transmits oculomotor, trochlear, ophthalmic division of trigeminal, abducens, and ophthalmic veins. The optic foramen transmits the optic nerve and ophthalmic artery. And the jugular foramen transmits the glossopharyngeal, vagus, and accessory nerves, the internal jugular vein, and the sigmoid sinus.
What passes through the carotid canal?
spinal cord
