Cranial nerves & MT1 Flashcards
What is cranial nerve I?
Olfactory
What is cranial nerve II?
Optic
What is cranial nerve III?
Occulomotor
What is cranial nerve IV?
Trochlear
What is cranial nerve V?
Trigeminal
What is cranial nerve VI?
Abducens
What is cranial nerve VII?
Facial
What is cranial nerve VIIII?
Vestibulocochlear
What is cranial nerve IX?
Glossopharyngeal
What is cranial nerve X?
Vagus
What is cranial nerve XI?
Spinal accessory
What is cranial nerve XII?
Hypoglosseal
What is the entry/exit & function for cranial nerve I?
Sensory
Enter: cribriform plate
Function: Smell
What is the entry/exit & function for cranial nerve II?
Sensory
Enter: Optic canal
Function: vision
What is the entry/exit & function for cranial nerve III?
Motor - visceral efferent
Exit: Superior orbital fissure
Function: Innervate muscles in eye
What muscles does the oculomotor nerve innervate?
Levator palpebrae
Superior/inferior/medial rectus
Inferior oblique
Sphincter pupillae & cilliary
What is the entry/exit & function for cranial nerve IV?
Motor
Exit: superior orbital fissure
Function: Innervate superior oblique muscle
/What is the entry/exit & function for cranial nerve Vi (ophthalmic)
Sensory
Enter: superior orbital fissure
Function: sensory from face, nasal, orbital structures
What are the divisions of the trigeminal nerve?
Ophthalmic - lacrimal, frontal, maxillary
Maxillary
Mandibular - lingual, inferior alveolar, buccal
What is the entry/exit & function for cranial nerve Vii (maxillary)?
Sensory
Enter: Foramen rotundum
Function: sensory from dura, nasal, lower eyelid, upper cheek, lip, teeth
What is the entry/exit & function for cranial nerve Viii (mandibular)?
Sensory & motor
Enter: foramen ovale
Function: motor to muscles of mastication. Sensory from lower face, cheek, lip, teeth, ear
What is the entry/exit & function for cranial nerve VI?
Motor
Exit: superior orbital fissure
Innervates lateral rectus muscle
What is the entry/exit & function for cranial nerve VII?
Motor - muscles of facial expression
Exits: internal acoustic meatus & stylomastoid foramen
Function: muscles of facial expression. Special efferent - taste, anterior 2/3 of tongue. Visceral efferent - submandibular/sublingual glands
What are the divisions of the facial nerve?
Temporal Zygomatic Buccal Mandibular Cerbical Nerve to posterior belly of digastric & stylomyoid Chorda tympani
What is the entry/exit & function for cranial nerve VIII?
Sensory
Enter: internet acoustic meatus
Function: special afferent. Vestibular - balance, cochlear - hearing
What is the entry/exit & function for cranial nerve IX?
Sensory & motor
Exit: jugular foramen
Function: Special afferent - taste
Sensory afferent - posterior 1/3 tongue, upper pharynx, palatine tonsil
Visceral efferent - parotid gland
Somatic efferent - motor, stylopharyngeus
What is the entry/exit & function for cranial nerve X?
Sensory & motor
Exit: jugular foramen
Function:
Sensory afferent - external acoustic meatus
Visceral afferent - aortic receptors, numerous mucous membranes
Visceral efferent - smooth muscle, glands of pharynx, thorax, abdomen
Somatic efferent - muscles of soft palate, pharynx, larynx, carries CN XI fibres
What is the entry/exit & function for cranial nerve XI?
Motor
Exit: foramen magnum & jugular foramen
Function: somatic efferent - motor - pharyngeal muscles
What is the entry/exit & function for cranial nerve XII?
Motor
Exit: hypoglossal canal
Function: somatic efferent - innervates extrinsic & intrinsic tongue muscles
What passes through the cribriform plate?
Cranial nerve I (olfactory)
What passes through the optic canal
Cranial nerve II (optic)
What passes through the superior orbital fissure?
Cranial nerve III (oculomotor)
Cranial nerve IV (trochlear)
Cranial nerve Vi (ophthalmic)
Cranial nerve VI (abducens)
What passes through the foramen rotundum?
Cranial nerve Vii (maxillary)
What passes through the foramen ovale?
Cranial nerve Viii (mandibular)
What passes through the foramen spinosum?
Middle meningeal artery
What passes through the foramen lacerum?
Internal carotid artery
What passes through the Internal acoustic meatus?
Cranial nerve VII (facial)
Cranial nerve VIII (vestibulocochlear)
What passes through the jugular foramen?
Cranial nerve IX (glossopharyngeal)
Cranial nerve X (vagus)
Cranial nerve XI (accessory)
Internal jugular vein
What passes through the hypoglossal canal?
Cranial nerve XII (hypoglossal)
What passes through the carotid canal?
Internal carotid artery
What passes through the stylomastoid foramen
Cranial nerve VII
What passes through the foramen magnum?
Medulla
Spinal cord
Cranial nerve XI (accessory)
Vertebral arteries
What are the skull sutures?
Coronal Bregma Sagittal Lambdoid Lamda
What are the developmental skull sutures?
Anterior
Posterior
Mastoid
Sphenoid (anterior lateral)