C RANIAL NERVES
I. Cranial Nerves: 12 pairs, part of the PNS
A. I. = Olfactory: tiny sensory nerves that run from the nasal cavity to the olfactory bulb.
1. Sensory:
B. II. = Optic: sensory nerves that run from the retina to the optic chiasma.
1.
Sensory:
C. III. = Oculomotor:
1. Motor - Voluntary:
2. Motor - Involuntary:
a. Sphincter pupillae muscle of Iris (constricts pupil)
b.
3. Sensory - Proprioception
D. IV. = Trochlear:
1. Motor -
2. Sensory - Proprioception
E. V. = Trigeminal:
1. Sensory:
a. Cutaneous
receptors (touch, temp., pain, etc.) of face
b. Proprioception
2. Motor -
F. VI. = Abducens:
1. Motor -
2. Sensory - Proprioception
G. VII. = Facial:
1. Sensory:
a. Taste,
b.
Proprioception
2. Motor:
a.
b.
Involuntary: to Lacrimal (tear), nasal, Submandibular (salivary),
& Sublingual (salivary) glands
H. VIII. = Vestibulocochlear:
1.
I. IX. = Glossopharyngeal:
1. Sensory:
a.
b. Proprioception
2. Motor:
a. Voluntary:
b.
Involuntary:
J. X. = Vagus:
1. Sensory:
a.
from stretch receptors and pain receptors in the wall of the
organs in the thorax & abdomen
b. Proprioception
2. Motor:
a. Voluntary:
b. Involuntary:
K. XI. = Accessory:
1. Cranial portion:
a. Motor -
b. Sensory - Proprioception
2. Spinal portion:
a. Motor -
b.
Sensory - Proprioception
L. XII. = Hypoglossal:
1. Motor -
2. Sensory - Proprioception
Which of the following would be damaged if you could NOT move your
eye straight up?
a. IV, trochlear
b. III, oculomotor
c. V, trigeminal
d. VII, facial
e. VI, abducens