Perceving Motion Flashcards
Functions of motion
1) help us understand out environment
2) allow us to move through environment
3) allow us to perform subtle actions
4) attentional capture
5) provides information about objects
Akinetopsia
Blindness to motion
Real motion
Objects are physically moving
Apparent movement
Stationary stimuli presented in slightly different locations
Induced movement
Movement of one object results in perception of movement in another object
Local disturbance in optic array
Eyes are stationary and an object moves across the retina; motion is perceived
Global optic flow
Eyes move, objects move all together across retina, no motion perceived
Optic array
Structure created by surfaces, textures, and contours which changes as observer moves through environment
Image Displacement Signal
Occurs when image more across retina
Motor signal
Signal sent from brain to eye muscles
Corollary discharge signal
Copy of motor signal sent to comparator to tell it the eye is moving
Comparator
Area that receives signals and deterred if motion is detected
Movement is perceived when there is input from…
CDS or IDS
Motion is not perceived when there is input from…
Both CDS and IDS
What area of the brain contains neurons sensitive to movement?
Middle Temporal area (MT)
