Cranial Nerves Flashcards
Where are cranial nerves visible?
Ventral aspect of brain
What are the cranial nerves?
I. Olfactory II. Optic III. Oculomotor IV. Trochlear V. Trigeminal VI. Abducens VII. Facial VIII. Vestibulocochlear IX. Glossophaygeal X. Vagus XI. Accessory XII. Hypoglossal
What nerves are sensory?
CN I
CN II
VIII
What neves are motor?
CN III CN IV CN VI CN XI CN XII
What nerves are motor and sensory?
CN V
CN VII
CN IX
CN X
Where does CN I exit cranial cavity?
Cribriform plate of ethmoid
Where does CN II exit cranial cavity?
Optic canal
Where does CN III exit cranial cavity?
Superior orbital fissure
Where does CN IV exit cranial cavity?
Superior orbital fissure
Where does CN VI exit cranial cavity?
Superior orbital fissure
Where does CN V exit cranial cavity?
Foramen rotundum, Foramen Ovale, Superior orbital fissure
Where does CN VII exit cranial cavity?
Internal acoustic meatus
Where does CN VIII exit cranial cavity?
Internal acoustic meatus
Where does CN IX exit cranial cavity?
Jugular Foramen
Where does CN X exit cranial cavity?
Jugular Foramen
Where does CN XI exit cranial cavity?
Jugular Foramen
Where does CN XII exit cranial cavity?
Hypoglassal canal
What nerves are somatic?
CN III
CN IV
CN VI
CN XII
What nerves are parasympathetic?
CN III
CN VII
CN IX
CN X
What nerves are branchiomotor?
CN V CN VII CN IX CN X CN XI
Where do you find somatic motor?
Skeletal muscle somites
Where do you find visceral motor (parasympathetic)?
Glands/smooth muscle
Where do you find Brachiomotor?
Jaw, face, pharynx, larynx, head/shoulders
What is the only site in the CNS where the cell bodies of the primary afferent neurons live inside the CNS?
Mesencephalic nucleus
What are the three complex cranial nerves?
Facial, Glossopharyngeal and Vagus
Function of facial nerve?
Motor (muscles of facial expression)
Parasympathetic innervation to pterygopalatine and submandibular ganglia
Taste (anterior 2/3rd of tongue)
Function of glossopharyngeal nerve?
Tactile sense, pain and temperature sense from the posterior tongue
Taste (posterior 1/3rd of tongue)
Visceral sensation from carotid sinus and carotid body
Function of vagus nerve?
Parasympathetic innervation to ganglia serving thoracic and abdominal viscera
Motor
Tactile sense, pain, temperature sense form the lower pharynx, larynx and oesophagus
Visceral afferents from aorta, lung and gut
