The Brain - 9.4 - Cranial Nerves Flashcards
Cranial and spinal nerves are part of the ____________nervous system?
Peripheral Nervous System
There are _________ pairs of cranial nerves.
Twelve (12)
How are cranial nerves named?
Cranial nerves have a Roman numeral number and a name, such as olfactory I. optic II, …
TRUE or FALSE:
All cranial nerves are sensory only?
FALSE. Only 2 cranial nerves only carry sensory (afferent) messages towards the brain – the olfactory (I) and the optic (II).
Can cranial be mixed cranial nerves?
Yes. Most of the cranial nerves are mixed meaning they carry both afferent (sensory) input to the brain and efferent (motor) output to the muscles.
What two cranial nerves are sensory only?
Olfactory (smell) and optic (sight)
Name the three sets of cranial nerves that control movement of the eyelids.
Abducens, Oculomotor, Trochlear
The cranial nerve involved in smell is called the ___________________ .
Olfactory Nerve
The cranial nerve involved in vision is called the ________________.
Optic Nerve
The cranial nerve involved in hearing and equilibrium is the ________________ .
Vestibulocochlear Nerve
The cranial nerve involved in regulation of the heart rate is the _______________ .
Vagus Nerve
The cranial nerve that allows you to stick your tongue out at someone is the _____________ .
Hypoglossal Nerve
The cranial nerve that tells the facial expression muscles such as orbicularis oris, orbicularis oculi and frontalis to contract is the _________ .
Facial Nerve
The trigeminal nerve is a cranial nerve that tells the chewing muscles to “chew” such as the masseter, as well as allows sensory receptor messages of touch, hot, cold and pain to inform the brain of what is happening. Thus, this cranial nerve is called a ______________ nerve.
Mixed Nerve
The facial nerve sends information from the taste buds of the tongue to an area in the brain that interprets them and allows us to “taste”. This is a type of _________________ information.
Sensory
