Cranial Nerves Flashcards
True or false: There are 12 pairs of cranial nerves, and they are numbered 1-12 from rostral to caudal.
True
Cranial nerves are involved in which of the following functions? Select all that apply.
A. Conveying sensory information from the face and head to the brain.
B. Sending motor signals to skeletal muscles of the head and neck.
C. Conveying sensory information from the skin surfaces of the upper and lower limbs.
D. Sending motor signals to skeletal muscles of the upper and lower limbs.
E. Carrying parasympathetic outflow of the autonomic nervous system.
F. Allow for special sensory functions such as smell, vision, hearing, balance, and taste.
A, B, E, F
True or false: Visceral motor components of cranial nerves innervated skeletal muscle.
False
Visceral motor components innumerate smooth muscle, cardiac muscle, and glands. Somatic motor components innervated skeletal muscle.
Which of the following cranial nerves allows us to have a sense of smell?
A. Olfactory
B. Optic
C. Oculomotor
D. Abducens
A
Which cranial nerves are considered extra ocular cranial nerves? Select all that apply.
A. Olfactory
B. Optic
C. Oculomotor
D. Trochlear
E. Abducent
C, D, E
Which of the following cranial nerves has both somatic and visceral motor components?
A. Optic
B. Oculomotor
C. Trochlear
D. Abducent
B
Which of the following cranial nerve carries all 5 nerve components? Select all that apply.
A. CN VIII
B. CN VII
C. CN IX
D. CN X
E. CN V
B, C, E
Which cranial nerves travel through the internal acoustic meatus? Select all that apply.
A. Facial
B. Vestibulocochlear
C. Glossopharygneal
D. Vagus
A, B
Which of the following cranial nerves contain only somatic motor components? Select all that apply.
A. Facial
B. Hypoglossal
C. Trigeminal
D. Oculomotor
E. Accessory
F. Trochlear
G. Abducent
B, E, F, G
The only four cranial nerves to carry ONLY somatic motor components are the trochlear, abducent, hypoglossal, and spinal accessory nerves.
The facial nerve carries all 5 components.
The oculomotor nerve carries both visceral and somatic motor components.
Damage to which of the following cranial nerves would produce weakness of the muscles of the tongue?
A. Accessory
B. Hypoglossal
C. Facial
B
The function of the cranial nerves is…
To send sensory information from the face ad head to the brain and send motor signals to the skeletal muscles of the head and neck
Do the cranial nerves make up the parasympathetic or sympathetic division of the autonomic nervous system?
Parasympathetic
What are the special senses?
Smell
See
Balance
Hear
Taste
What are somatic motor components?
Voluntary motor components innervating skeletal muscles (in orbit, tongue, neck)
What are visceral motor components?
Motor components giving rise to the parasympathetic system.
Preganglionic fibers synapse outside the CNS in a parasympathetic ganglion. Post-ganglionic fibers go on to innervated smooth muscles, cardiac muscle, and glands.
How are the peripheral nervous system, autonomic nervous system, somatic nervous system, sympathetic nervous system, and parasympathetic nervous system related?
The Peripheral Nervous System contains two branches:
1. Autonomic (visceral) Nervous System - this is involuntary, controlling body processes such as breathing, circulation, and digestion. It only as motor pathways.
A. The Sympathetic Nervous System is a sub branch of the ANS; it is responsible for our “fight or flight”.
B. The Parasympathetic Nervous System is another sub branch of the ANS; it is responsible for our ”rest and digest”.
2. Somatic Nervous System - this is voluntary, and controls muscles and movement. It has both sensory AND motor components.
