191
Image of the retina showing its blood
vessels converging on the optic disc.
chapter
7
Sensory
Physiology
S
ECTION
A
General Principles
Sensory Receptors
The Receptor Potential
Primary Sensory Coding
Stimulus Type
Stimulus Intensity
Stimulus Location
Stimulus Duration
Central Control of Afferent Information
Neural Pathways in Sensory Systems
Ascending Pathways
Association Cortex and Perceptual
Processing
Factors That Affect Perception
S
ECTION
B
Specifi
c Sensory Systems
Somatic Sensation
Touch and Pressure
Sense of Posture and Movement
Temperature
Pain
Neural Pathways of the Somatosensory
System
Vision
Light
Overview of Eye Anatomy
The Optics of Vision
Photoreceptor Cells and
Phototransduction
Neural Pathways of Vision
Color Vision
Eye Movement
Hearing
Sound
Sound Transmission in the Ear
Hair Cells of the Organ of Corti
Neural Pathways in Hearing
Vestibular System
The Semicircular Canals
The Utricle and Saccule
Vestibular Information and Pathways
Chemical Senses
Taste
Smell
Additional Clinical Examples
Hearing and Balance: Losing Both at
Once
Color Blindness
t
he neural mechanisms
that process afferent
sensory information
bring about awareness of
our internal and external
world. Such information is
communicated to the CNS
from the skin, muscles, and
viscera as well as from the
visual, auditory, vestibular,
and chemical sensory systems.
In this chapter you will learn
how input to the brain and
spinal cord from sensory
neurons is crucial for our
interactions with the world
around us and for the body’s
maintenance of homeostasis.
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