Cranial Nerves

Nerve

Name

Sensory Function

Motor Function

I

Olfactory

smell

-

II

Optic

vision

-

III

Oculomotor

-

eye movement

IV

Trochlear

-

eye movement

V

Trigeminal

general sensation of head and face

chewing

VI

Abducens

-

eye movement

VII

Facial

taste

facial movement

VIII

Vestibulocochlear

hearing and balance

-

IX

Glossopharyngeal

taste

swallowing

X

Vagus

taste

heart rate, breathing, digestive function

XI

Accessory

-

head movement

XII

Hypoglossal

-

tongue movemen


Selected Structures and Functions

Cerebrum

controls reasoning and thinking; responsible for conscious movement

Pineal Body

endocrine gland secreting melatonin; prepares the body for sleep

Corpora Quadrigemina

control some reflex responses, such as the response to sound

Thalamus

relay area for sensory impulses passing to the cerebral cortex

Hypothalamus

controls the ANS, regulation of body temperature, water balance, thirst, and fat and carbohydrate metabolism

Corpus Callosum

major commissure connecting the cerebral hemispheres

Lateral Ventricle

fluid-filled chamber protecting the brain from trauma

Olfactory Lobe

sense of smell

Pons

consists primarily of motor and sensory fiber tracts between the brain and lower CNS centers

Medulla Oblongata

contains autonomic centers involved in the control of heart rate, respiratory rhythm, blood pressure, swallowing and vomiting

Spinal Cord

tracts of CNS fibers within the spinal column

Fourth Ventricle

chamber within the cerebellum that protects the area from trauma

Cerebellum

unconscious coordination of skeletal muscle activity and control of balance and equilibrium

Pituitary Gland

"master" endocrine gland; see description under Endocrine System