1. Chapter 4: Sensation and Perception
Our Senses
Chapter 4:
Sensation and Perception

2. Vision Light gathers to the eye Light enters the eye
The cornea reflects the light through the pupil (the iris opens and closes the pupil)
The lens sends light to the back of the eye
Light gets turned into neural impulses
The image is interpreted in the occipital lobe

3. Color Blindness
Color vision deficiency affects about 8% males and less than 1% females
Most common: red-green
These colors may appear “washed out”

4. Color Blindness
Monochromats: people who are totally colorblind; they can see only light and darkness
Dichromats: people who are only partially colorblind; they can only discriminate between two colors - red/green or blue/yellow

5. Hearing Sound waves cause the eardrum to vibrate
The vibrations go to the inner ear
Signals are sent to the auditory nerve and to the temporal lobe

6. Loudness and Pitch
Loudness depends on amplitude of the sound wave. The greater the amplitude, the louder the sound perceived.
Pitch depends on the frequency of sound waves
FYI – NEYLAND STADIUM 122

7. Smell
Neural receptors in the nose send information to the olfactory bulb in the brain and onto the thalamus.
Smell works in connection with taste.

8. Taste Sweet, sour, salty, bitter, savory Hot and spicy is not a taste
The sides of the tongue is more sensitive.
The back is more sensitive to bitter.

9. Kinesthesis
Movement: kinesthesis is the sense that informs us about the positions and motion of parts of our bodies.
Without this, we would have to watch every time we made a movement or took a step.

10. Vestibular Sense
Balance: the sense of equilibrium that tells us about our position relative to gravity; whether or not we are upside-down, about to fall, spinning, etc.
Sensory organs in the ears monitor the body’s motion and position.