Exam 4 (Cranial nerves) Flashcards
Which cranial nerves are pure sensory?
- Olfactory (I),
- Optic (II)
- Vestibulocochlear (VIII)
Which cranial nerves are in the mixed category?
- Trigeminal (V),
- Facial (VII),
- Glossopharyngeal (IX)
- Vagus (X)
How many skeletal muscles does each eye have?
6
What are the 3 eyeball motor cranial nerves?
- Oculomotor (III),
- Trochlear (IV) &
- Abducent (VI)
Which cranial nerve is responsible for lateral eye movement?
- Abducent (VI) via Lateral rectus
- (Abduct= going lateral)
Which cranial nerve controls 4 eye movement muscles?
Oculomotor (III)
What does the accessory nerve control?
Innervates the Sternocleidomastoid & Trapezium muscles
What does the Hypoglossal nerve control?
- Tongue & floor of mouth
- (Hypo= under tongue)
Which nerve helps with balance?
Vestibulocochlear (VIII)
What is the crossover for the optic nerve called?
Optic chiasm
Where is the visual cortex located?
In the occipital lobe
Where are smells processed?
Near the frontal cortex
What are the 3 middle ear bones?
- Malleus,
- Incus &
- Stapes
Where are auditory signals processed?
Temporal lobe
What are the 2 primary things the Trigeminal nerve takes care of?
Sensory for the front of the head & chewing
What are the 3 divisions of the Trigeminal nerve?
- Ophthalmic V1,
- Maxillary V2 &
- Mandibular V3
What are the 2 sensory nerves of CN 5V₁ & which one is primary?
- Supraorbital nerve (Primary) &
- Supratrochlear nerve
What are the 2 nerves of CN 5V₂?
- Infraorbital nerve &
- Palatine nerve
What does CN5V₂ pass through?
Infraorbital foramena
What is the major nerve for the jaw?
CN 5V₃ Inferior Alveolar Nerve
What are the nerve branches for CN 5V₃?
- Inferior Alveolar nerve,
- Mental nerve &
- Lingual nerve
What are the functions of the facial nerve?
- Taste, salivation, cries &
- facial motor function
What are the functions of the Glossopharyngeal nerve?
- Sensory (posterior 1/3 of tongue), Inner & middle ear & carotid sinus/bodies
- pharyngeal motor
Which facial gland is primarily connected to CN IX?
Parotid gland
What nerve is responsible for the aortic arch sensory?
Vagus nerve (X)
What nerve is responsible for the cricothyroid muscle?
External branch of the superior laryngeal nerve from the Vagus nerve.
What is the outer covering of a nerve?
Outer Epineurium then interior Epineurium
What is the border of a nerve fascicle?
Perineurium
What is the starting point for a brachial plexus block?
Supraclavicular fossa
