Cranial Fossae and Cranial Nerves Flashcards
What goes through the carotid canal?
Internal carotid artery
What goes through the foramen spinosum?
Middle meningeal artery
What is an outgrowth of the telencephalon?
CN I olfactory
Where does the olfactory mucosa go through?
Cribriform plate to synapse in olfactory bulb
Where do the olfactory tracts go to?
Prepiriform area of amygdala (primary olfactory cortex)
What is the only sensory system that is not relayed through thalamus?
CN I olfactory
What is an extension of the diencephalon?
CN II Optic
Where is the CN II optic from?
The retina through the optic canal, forms chiasm then optic tracts
What runs in the lateral wall of cavernous dural venous sinus?
CN III Oculomotor, CN IV Trochlear
Wha goes through the annular ring?
CN III Oculomotor and CN VI Abducent
Where is the CN III Oculomotor?
Midbrain through superior orbital fissure to orbit
What kind of motor control is there in the CN III Oculomotor?
Somatic and parasympatheitc
Somatic motor control is to?
Inferior oblique, superior rectus, inferior rectus and medial rectus, levator palpabrae
Parasympathetic control is to?
Sphincter papillae and ciliary muscle
What is the superior division of oculomotor?
Leavtor palpabrae and superior rectus
Where is the CN IV Trochlear?
Midbrain through superior orbital fissure to orbit
Is the CN IV Trochlear o the inside or outside of the annular ring?
Outside
What is the only cranial nerve which all fibres cross to the opposite side?
CN IV Trochlear
Where does the motor fibres of the CN IV Trochlear go to?
Superior Oblique
Where does the CN V Trigeminal nerve originate from?
The pons, forms a ganglion and divides into 3 divisions
What are the 3 divisions of the Trigeminal nerve?
Ophthalmic
Maxillary
Mandibular
What kind of innervation does the CN V Trigeminal give?
Motor and Sensory
What does the Lacrimal, Zygomatic, Lingual and Auriculotemporal allow?
Passage of parasympathetic fibres from other cranial nerves
Where does the CN IV Abducent nerve originate from?
The pons and passes through the superior orbital fissure to reach the orbit
What is the long extradural pathway?
CN VI Abducent
Where does the CN IV Abducent pass through?
Cavernous dural venous sinus with internal carotid artery
Where does the CN VII Facial nerve originate from?
The pons, through internal acoustic meatus into temporal bone
What is involved in the CN VII Facial nerve?
Greater petrosal, stapedial and chorda tympani
Where does the motor fibres of the CN VII leave?
Stylomastoid foramen
Where does the vestibule apparatus and auditory apparatus go through?
Internal auditory meatus to pons/medulla oblongata
Where does the CN IX Glossopharyngeal originate from?
The medulla oblongata and passes through jugular foramen
Where does the parasympathetic control go to in the CN IX?
Parotid, buccal and labial glands
Where do you get taste from?
Posterior 1/3rd tongue
Where does the motor control go to in glossopharyngeal?
Pharyngeal plexus and stylopharyngeus
Where does the CN X Vagus nerve originate from?
The medulla oblongata though the jugular foramen
What are the distributions of the CN X Vagus nerve?
Cranial, cervical, thoracic and abdominal
Where are the pressure receptors?
Aortic arch
Where are the chemoreceptors?
In the para-aortic body
Where does the CN XI Accessory nerve originate from?
The spinal cord, enter foramen magnum and join cranial root then pass through jugular foramen
Where is the motor control in the CN XI Accessory nerve?
Trapezius and sternocleidomastoid
What is considered part of the vagus nerve?
Cranial root
Where does the CN XII Hypoglassal nerve originate from?
The medulla oblongata passes through hypoglassal canal
What enters the root of the tongue above hyoid bone?
CN XII Hypoglassal
Where does the ophthalmic branch of trigeminal enter?
Orbit through superior orbital fissure
Where does the maxillary branch of trigeminal enter?
pterygopalatine fossa through foramen rotundum
Where does the mandibular branch of trigeminal go through?
foramen oval to inferior surface of the base of the skull
