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What foramen does the trochlear nerve go through?
The trochlear nerve is also known as cranial nerve IV (CN-IV). It is the only cranial nerve that emerges dorsally from the brain, which also makes it the longest pathway. It is the smallest nerve to service the eye. CN-IV passes through superior orbital fissure, and it provides for only a motor function. It serves the superior oblique eye muscle and connects to the annular tendon. As a result, it processes brain signals to move eyes up and down and outwards. Whether due to a head injury or a complication of surgery, damage to this nerve will compromise some ability to use the superior oblique eye muscle. Without the use of the nerve, the superior oblique eye muscle will not no longer function properly. The muscle, not the trochlear nerve, physically moves the eyeball. Double vision, otherwise known as diplopia, results from problems with muscle or the nerve. Complications from these issues will result in a diminished ability to walk, especially down stairs.
Which Maxillary nerves supply to maxillary teeth?
The maxillary teeth are primarily supplied by the superior alveolar nerves, which include the anterior, middle, and posterior superior alveolar nerves. These nerves originate from the maxillary division of the trigeminal nerve (CN V2) and provide sensory innervation to the maxillary teeth and surrounding structures.
Why posterior superior alveolar nerve block does not have subjective symptoms?
The posterior superior alveolar nerve block is usually performed in the region of the maxillary molars, where the nerve innervates. The block effectively numbs the nerve, preventing transmission of pain signals to the brain, which is why subjective symptoms are typically not felt during the procedure.
What does dingling to the bottom lip mean?
The skin of bottom lip is supplied by infra orbital nerve which is branch of maxillary branch of trigeminal nerve. The nerve may be pinched somewhere in its course.
What is the smallest cranial nerve?
The smallest cranial nerve is the trochlear nerve (CN IV). It is responsible for controlling the superior oblique muscle of the eye, which helps with downward and inward eye movement.
What is the function of the superior orbital fissure?
The superior orbital fissure is a passage in the skull that allows structures like blood vessels and nerves to pass from the inside of the skull to structures in the orbit (eye socket). It is important for allowing the movement and function of the eyes, as well as providing sensory innervation to the forehead and upper eyelid.
What foramen does the trochlear nerve go through?
The trochlear nerve is also known as cranial nerve IV (CN-IV). It is the only cranial nerve that emerges dorsally from the brain, which also makes it the longest pathway. It is the smallest nerve to service the eye. CN-IV passes through superior orbital fissure, and it provides for only a motor function. It serves the superior oblique eye muscle and connects to the annular tendon. As a result, it processes brain signals to move eyes up and down and outwards. Whether due to a head injury or a complication of surgery, damage to this nerve will compromise some ability to use the superior oblique eye muscle. Without the use of the nerve, the superior oblique eye muscle will not no longer function properly. The muscle, not the trochlear nerve, physically moves the eyeball. Double vision, otherwise known as diplopia, results from problems with muscle or the nerve. Complications from these issues will result in a diminished ability to walk, especially down stairs.
Relations of the vascular and neural compartment in pterygomaxillary fissure?
The pterygomaxillary fissure serves as a passageway for both vascular and neural structures. The maxillary artery and its branches, which supply blood to the facial structures, run through this fissure. Additionally, the infraorbital nerve, a branch of the maxillary nerve (V2), passes through the pterygomaxillary fissure to provide sensory innervation to the face.
Which are the following structures passes through the greater sciatic foramen of the llium?
The structures that pass through the greater sciatic foramen of the ilium include the sciatic nerve, the superior gluteal nerve and vessels, the inferior gluteal nerve and vessels, the pudendal nerve, the nerves to the obturator internus and quadratus femoris muscles, and the piriformis muscle.
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.
Nerve that helps feel a toothache?
On the top (maxilla) it is the superior alveolar nerve. On the bottom (mandible) it is the inferior alveolar nerve.
What is the Trochlea of the superior oblique muscle of the eye?
The Trochlea Nerve (cranial nerve 4) controls the superior oblique muscle of the eye. It turns the eye laterally and downwards.
What eye movement is caused by the superior oblique?
Superior oblique is controlled by cranial nerve VI (Trochlear nerve). This muscle depresses the eye and moves it laterally. A person with damage to this cranial nerve will have difficulty looking down and to the side.
Which Maxillary nerves supply to maxillary teeth?
The maxillary teeth are primarily supplied by the superior alveolar nerves, which include the anterior, middle, and posterior superior alveolar nerves. These nerves originate from the maxillary division of the trigeminal nerve (CN V2) and provide sensory innervation to the maxillary teeth and surrounding structures.
What muscle is innervated by the trochlear nerve?
The superior oblique muscles
Why posterior superior alveolar nerve block does not have subjective symptoms?
The posterior superior alveolar nerve block is usually performed in the region of the maxillary molars, where the nerve innervates. The block effectively numbs the nerve, preventing transmission of pain signals to the brain, which is why subjective symptoms are typically not felt during the procedure.
Acoustic neuroma most commonly arise from which part of vestibular nerve superior or inferior?
Inf vestibular nerve
