Chapter 8.8: Nervous System
12 pairs Olfactory Nerves Sense of smell
The Cranial Nerves
Figure 8.25a
Optic Nerves Visual information from the eyes
Cranial cont..
Figure 8.25a
Oculomotor Nerves Muscles that move the eyes Controls the amount of light entering the
eye Controls the shape of the lens
Cranial cont…
Figure 8.25a
Trochlear Nerves Moves the eye
Cranial cont…
Figure 8.25a
Trigeminal Nerves Chewing
Cranial cont…
Figure 8.25a
Abducens Nerves Abducts the eyeball
Cranial cont…
Figure 8.25a
Facial Nerves Deep pressure sensations of the face Taste Facial expressions Controls tears and saliva
Cranial cont…
Figure 8.25a
Vestibulocochlear Nerve Sensory receptors in inner ear Position, movement and balance Hearing
Cranial cont…
Figure 8.25a
Glossopharyngeal Nerves Taste Blood Pressure Swallowing Salivary Glands
Cranial cont…
Figure 8.25a
Vagus Nerves Controls soft palate, pharynx and
esophagus Affects cardiac and smooth muscles Affects glands of digestive system
Cranial cont…
Figure 8.25a
Accessory Nerves Swallowing Vocal cords and speech
Cranial cont…
Figure 8.25a
Hypoglossal Nerves Control over tongue muscles
Cranial cont…
Figure 8.25a
Cervical plexus Muscles of neck Controls diaphragm
The Spinal Nerves
Figure 8.26
Brachial plexus Shoulder girdle and upper limbs
Spinal cont..
Figure 8.26
Lumbar and sacral plexus Pelvic girdle and lower limbs
Spinal cont…
Figure 8.26