Which space transmits the greater petrosal nerve?
Daniel Johnston
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The greater petrosal nerve supplies the lacrimal gland by giving branches to the zygomatic branch of the maxillary nerve, which later travels as the lacrimal nerve to the lacrimal gland.
Where does the greater petrosal nerve come from?
the greater petrosal nerve, which comes from the facial nerve and runs through the hiatus on the anterior surface of the petrous portion of the temporal bone. a communicating branch with the greater petrosal nerve, which comes from the tympanic cavity, having originated at the glossopharyngeal nerve.
What does the greater petrosal nerve innervate?
The greater petrosal nerve is a mixed nerve carrying parasympathetic, taste, and sensory fibers. ... The greater palatine nerve that innervates the bony hard palate of the mouth. The lesser palatine that innervates the uvula, tonsils and soft palate.
What does greater petrosal nerve pass?
After leaving the geniculate ganglion, the greater petrosal nerve continues forward toward the cheek. It passes through an opening called the hiatus of the facial canal, then along a narrow passage called the middle cranial fossa. It then exits the skull through the foramen lacerum.
Does the greater petrosal nerve go through foramen lacerum?
In the middle cranial fossa, the greater petrosal nerve passes medially to enter the foramen lacerum and fuses there with the deep petrosal nerve, forming the Vidian nerve or pterygoid nerve, which passes from the pterygoid canal to the pterygopalatine fossa (PPF).
The Facial Nerve (CNVII): Animated Review
Where does the greater petrosal nerve enter the skull?
It enters the middle cranial fossa through the hiatus of the facial canal, along with the petrosal branch of the middle meningeal artery.
Where does the greater petrosal nerve exit the temporal bone?
The nerve proceeds anteromedially and exits the superior surface of the temporal bone through the hiatus of the greater petrosal nerve (facial hiatus/hiatus fallopii) and into the middle temporal fossa.
How does the greater petrosal nerve enter the Pterygopalatine fossa?
Leaving the geniculate ganglion, the greater petrosal nerve pierces the upper surface of petrous temporal bone, enters the middle cranial fossa, is joined at foramen lacerum by the deep petrosal nerve (sympathetic fibres from internal carotid plexus) to form the nerve of the pterygoid canal, which goes to the ...
What is the lesser petrosal n?
Description. The lesser petrosal nerve (small superficial petrosal nerve) is the General visceral efferent (GVE) component of the glossopharyngeal nerve (CN IX), carrying parasympathetic fibers from the tympanic plexus to the parotid gland.
What nerve supplies Stapedius?
The nerve to stapedius arises from the facial nerve to supply the stapedius muscle. The branch is given off in the facial nerve's mastoid segment, as it passes posterior to the pyramidal process. Damage to this branch with resulting paralysis of stapedius leads to hypersensitivity to loud noises (hyperacusis).
What is the tympanic nerve?
Medical Definition of tympanic nerve
: a branch of the glossopharyngeal nerve arising from the petrosal ganglion and entering the middle ear where it takes part in forming the tympanic plexus. — called also Jacobson's nerve.
What is the lingual nerve?
The lingual nerve is one of the sensory branches of the mandibular division of the trigeminal nerve. [5] It contains general somatic afferent nerve fibers and, after chorda tympani joins it, also carries general visceral efferent nerve fibers and special visceral afferent fibers.
What is external petrosal nerve?
The external petrosal nerve is one of the three branches from the geniculate ganglion. It carries sympathetic fibers to the sympathetic plexus surrounding the middle meningeal artery, coursing extradurally laterally to the greater and lesser petrosal nerves on the petrous ridge's anterior surface 3.
Where do the chorda tympani joins the lingual nerve?
the chorda tympani exits the petrotympanic fissure and joins the lingual nerve approximately 2 cm below the skull base.
What is the Glossopharyngeal?
The glossopharyngeal nerve is the 9th cranial nerve (CN IX). It is one of the four cranial nerves that has sensory, motor, and parasympathetic functions. It originates from the medulla oblongata and terminates in the pharynx.
What is geniculate ganglion?
The geniculate ganglion is a sensory ganglion of the facial nerve (CN VII). It contains the cell bodies of the fibers responsible for conducting taste sensation from the anterior two-thirds of the tongue.
What does lesser petrosal nerve supply?
The lesser petrosal nerve carries preganglionic parasympathetic fibers to the parotid gland. It is considered a branch of the glossopharyngeal nerve although it receives contributions from two further sources 3: tympanic plexus: glossopharyngeal nerve via Jacobson's nerve (main contribution)
Where is the lesser petrosal nerve?
The nerve passes through its own canal to the floor of the middle cranial fossa, where it is located between the two layers of the dura mater between the petrous branch of the middle meningeal artery (medial) and the superior tympanic artery (lateral) 3.
What gives off lesser petrosal nerve?
The lesser petrosal nerve (Figure 26.3) is a continuation of the presynaptic fibers of the tympanic branch of the glossopharyngeal nerve with contributions from the nervus intermedius part of the facial nerve, and the auricular branch (Alderman's or Arnold's nerve) of the vagus nerve.
What is Pterygopalatine fossa?
The pterygopalatine fossa (PPF) is a cone-shaped depression deep to the infratemporal fossa and posterior to the maxilla on both sides of the skull. The fossa is located between the pterygoid process and the maxillary tuberosity, close to the orbital apex.
Where does the facial nerve enter the cranium?
It emerges from the pons of the brainstem, controls the muscles of facial expression, and functions in the conveyance of taste sensations from the anterior two-thirds of the tongue. The nerves typically travels from the pons through the facial canal in the temporal bone and exits the skull at the stylomastoid foramen.
What foramen does the facial nerve enter through?
The facial nerve exits the facial canal via the stylomastoid foramen. The nerve travels between the digastric and stylohyoid muscles and enters the parotid gland.
Where does the facial nerve exit?
The facial nerve exits the base of the skull at the stylomastoid foramen, which is an opening in the bone located near the base of the ear.
What foramen does cranial nerve 7 exit the skull?
The facial nerve then exits the facial canal (and the cranium) via the stylomastoid foramen. This is an exit located just posterior to the styloid process of the temporal bone.
What is Vestibulocochlear?
The vestibulocochlear nerve (auditory vestibular nerve), known as the eighth cranial nerve, transmits sound and equilibrium (balance) information from the inner ear to the brain.
