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26 Cards in this Set
- Front
- Back
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CN I
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-Olfactory
-Sensory -Relays Smell -Enters through Olfactory Foramina in Cribiform Plate -Odor dissolves in mucus -->interact with dendrites --> create action potential -Olfactory Bulb: beginning of tact that leads to brain (where nerves collect) |
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CN II
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-Optic
-Sensory -Vision -Enters through optic canal -Retina --> optic ganglia --> optic nerve --> optic chiasma --> thalamus --> optic radiations --> primary visual cortex of occipital lobe |
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CN III
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-Oculomotor
-Mixed -Sensory & motor to 4 of the 6 extrinsic eye muscles -Superior Orbital Fissure -Parasympathetic to intrinsic eye muscles --> accomadation (change lens shape) |
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CN IV
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-Trochlear
-Mixed -Somatic sensory & motor to one of extrinsic eye muscles -Superior Orbital Fissure |
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CN V
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-Trigeminal
-Mixed -Major function is sensory nerves of face; motor for mastication (masseter muscle) 1)Opthalmic Branch: superior orbital fissure 2)Maxillary Branch: Foramen Rotundum 3)Mandibular Branch: Foramen Ovale |
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CN VI
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-Abducens
-Mixed -Somatic sensory & motor to last extrinsic eye muscle (lateral abduction) -Superior Orbital Fissure |
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CN VII
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-Facial
-Mixed -Major motor nerve for facial muscles -Sensory from Anterior 2/3 of tongue -Innervates submandibular & sublingual salivary glands -Enters Internal acoustic meatus -Exits stylomastoid foramen |
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CN VIII
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-Vestibilocochlear
-Sensory -balance & equilibrium; hearing -Enters Internal Acoustic Meatus |
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CN IX
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-Glossopharyngeal
-Mixed -Sensory from tonsils & middle ear (feeling of sore throat or ear ache) -Sensory from Posterior 1/3 of tongue -monitors blood pressure in carotid sinus -parasympathetic to parotid salivary gland -Jugular Foramen |
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CN X
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-Vagus
-Mixed -80-85% of parasympathetic efferent in body (almost all thoracic & abdominal cavity) -Jugular Foramen |
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CN XI
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-Spinal Accessory
-Mixed -ONLY spinal root; derives from cervical plexus -Sensory from & motor to sternocleidomastoid & trapezius -Jugular Foramen |
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CN XII
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-Hypoglossal
-Mixed -Somatic motor & sensory -Intrinsic muscles of tongue -Swallowing & speech -Hypoglossal Canal |
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Inferior Rectus Muscle
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-Oculomotor Nerve (CN III)
-Eye looks down |
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Superior Rectus Muscle
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-Oculomotor Nerve (CN III)
-Eye looks up |
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Medial Rectus Muscle
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-Oculomotor Nerve (CN III)
-Eye looks medially |
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Inferior Oblique Muscle
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-Oculomotor Nerve (CN III)
-Eye rolls, looks up laterally |
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Lateral Rectus Muscle
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-Abducens Nerve (CN VI)
-Eye looks laterally |
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Superior Oblique Muscle
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-Trochlear Nerve (CN IV)
-Eye rolls, looks down laterally |
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Acuity
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-sharpness of a visual image
-Snellen Eye Test |
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Astigmatism
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-abnormal curvature of cornea
-are lines wavy or different darkness |
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Accomodation
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-ability to adjust focusing apparatus to account for changes in distance
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Presbyopia
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-ability for lens to accommodate decreases as we age
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Convergence
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-medial movement of eyes to focus on near object
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Blind Spot
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-point of optic disc, where there are no photoreceptors
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Color Blindness
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-color vision deficiency
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Binocular Vision
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-Gives depth perception
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