Cranial Nerves Flashcards
I Olfactory
carries smell impulses from nasal mucous membrane to brain
* sensory impulses
smell
II Optic
Carries visual impulses from eye to brain
* Sensory impulses
vision
III Oculomotor
Contracts eye muscles to control eye movements (interior lateral, medial, and superior), constricts pupils, and elevates eyelids
* Motor impulses
eye movement and pupil reflex
IV Trochlear
Contracts one eye muscle to control inferomedial eye movement
* motor impulses
eye movement
V Trigeminal
Carries sensory impulses of pain, touch, and temperature from the face to the brain; influences clenching and lateral jaw movements (biting, chewing)
* sensory and motor impulses
face sensation and chewing
VI Abducens
Controls lateral eye movements
* motor impulses
eye movement
VII Facial
- Contains sensory fibers for taste on anterior two thirds of tongue, and stimulates secretions from salivary glands (submaxillary and sublingual) and tears from lacrimal glands
* sensory impulses - Supplies the facial muscles and affects facial expressions (smiling, frowning, closing eyes)
* motor impulses
face movement and taste
VIII (Acoustic, vestibulocochlear)
Contains sensory fibers for hearing and balance
* sensory impulses
hearing and balance
IX (Glossopharyngeal)
- Contains sensory fibers for taste on posterior third of tongue and sensory fibers of the pharynx that result in the gag reflex when stimulated
* sensory impulses - Provides secretory fibers to the parotid salivary glands; promotes swallowing movements
* motor impulses
throat sensation, taste, and swallowing
X (Vagus)
Carries sensations from the throat, larynx, heart, lungs, bronchi, gastrointestinal tract, and abdominal viscera; promotes swallowing, talking, and production of digestive juices
* Sensory and motor impulses
movement, sensation and abdominal organs
XI (Spinal accessory)
Innervates neck muscles (sternocleidomastoid and trapezius) that promote movement of the shoulders and head rotation; also promotes some movement of the larynx
* motor impulses
neck movement
XII (Hypoglossal)
Innervates tongue muscles that promote the movement of food and talking
* motor impulses
movement, sensation and abdominal organs
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- Olfactory
- Optic
- Oculomotor
- Trochlear
- Trigeminal
- Abducens
- Facial
- Vestibulocochlear
- Glossopharyngeal
- Vagus
- Accessory
- Hypoglossal
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- Olfactory
- Optic
- Oculomotor
- Trochlear
- Trigeminal
- Abducens
- Facial
- Vestibulocochlear
- Glossopharyngeal
- Vagus
- Accessory
- Hypoglossal
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Cranial I: Sensory
Cranial II: Sensory
Cranial III: Motor
Cranial IV: Motor
Cranial V: Both (sensory & motor)
Cranial VI: Motor
Cranial VII: Both (sensory & motor)
Cranial VIII: Sensory
Cranial IX: Both (sensory & motor)
Cranial X: Both (sensory & motor)
Cranial XI: Motor
Cranial XII: Motor
