Cranial Nerves Flashcards
Cranial nerves are … that innervate muscles or glands, carry impulses from sensory receptors, or have a combination of motor and sensory fibers
bundles of sensory or motor fibers
Cranial nerves are bundles of sensory or motor fibers that …., carry impulses from sensory receptors, or have a combination of motor and sensory fibers
innervate muscles or glands
Cranial nerves are bundles of sensory or motor fibers that innervate muscles or glands, ..
carry impulses from sensory receptors, or have a combination of motor and sensory fibers
How many pairs of cranial nerves are there?
12
How are the cranial nerves numbered?
numbered I-XII, from rostral to caudal
What do the names of the cranial nerves reflect?
reflect their general distribution or function.
Each cranial nerve has…
central connections (nuclei of origin) within the brain and has peripheral connections.
Cranial nerves emerge through …. in the cranium and are covered by tubular sheaths derived from the cranial meninges.
foramina or fissures
Cranial nerves emerge through foramina or fissures in the _____ and are covered by tubular sheaths derived from the cranial meninges.
cranium
Cranial nerves emerge through foramina or fissures in the cranium and are covered by …
tubular sheaths derived from the cranial meninges.
Which foramina does CN I pass thru?
Cribriform foramina
What does CN II pass thru?
Optic canal
What passes thru superior orbital fissure?
CN III , IV, V1, VI
What does CN V2 pass thru?
Foramen rotundum
What does CN V3 pass thru?
Foramen ovale
What passes thru the internal acoustic meatus?
CN VII, VIII
What passes thru the jugular foramen?
CN IX X XI
What does CN XII pass thru?
Hypoglossal canal
CNI aka
Olfactory nerve
CN II aka
Optic nerve
CN III aka
Oculomotor nerve
CN IV aka
Trochlear nerve
CN V1 aka
Ophthalmic nerve
CN VI aka
Abducent nerve
CN V2 aka
Maxillary nerve
CN V3 aka
Mandibular nerve
CN VII aka
Facial nerve
CN VIII aka
Vestibulocochlear nerve
CN IX aka
Glossopharyngeal nerve
CN X aka
Vagus nerve
CN XI aka
Spinal accesory nerve
CN XII aka
Hypoglossal nerve
FUNCTIONAL COMPONENTS OF A CRANIAL NERVE
general somatic efferent general visceral efferent general somatic afferent general visceral afferent Fibers transmitting unique sensation
general somatic efferent
Motor efferent fibers innervating voluntary muscles
general visceral efferent
Motor efferent innervating involuntary smooth muscles or gland
general somatic afferent
Sensory afferent fibers transmitting general sensation from skin and mucous membranes
general visceral afferent
Sensory afferent fibers conveying sensation from the viscera
Sensory afferent fibers conveying sensation from the viscera e.g ….
carotid body, pharynx, larynx, trachea, lungs, heart, and gastrointestinal tract
Fibers transmitting unique sensation such as …
taste, smell, vision, hearing and balance.
OLFACTORY (CN I) function
Special sensory
The cell bodies of olfactory receptor neurons are located in
Olfactory organ
The olfactory nerves pass through …
tiny foramina in the cribriform plate of the ethmoid bone and enter the olfactory bulb
