ch. 5 Flashcards
Central and sensory systems regulate movements through information about…
The state of the environment
The state of our own body
The state of our body within the environment
_____ are the most critical receptors for supplying information about the movement of objects in the outside world
Eyes
T or F: vision is essential for all motor performances
False
Central vision is a major sensory component of multiple types of motor behavior (what types of motor behavior?)
hint: there are 4
Visual acuity
Contrast
Object identification
Consciousness
Anatomically, both the dorsal and ventral streams are thought to project visual information from the environment by means of the _____ to the ______ in the brain.
retina; primary visual cortex
The dorsal stream sends information to the _______ whereas the ventral stream projects to the ________ cortex
posterior parietal cortex; inferotemporal
The ventral visual stream requires…
Contrast
Focus
Sufficient light
The ventral visual system is specialized for…
Object identification
Conscious environment perception
T or F: the ventral system is sensitive to WHERE you are looking
False!
the ventral system is sensitive to WHAT you are looking at or focusing on
The primary input of the dorsal visual stream is considered to be…
full field approx. 180 degrees
T or F: the dorsal visual system does NOT require focus and seems to operate effectively in low-light situations
True
T or F: ventral stream processing is vision for action
FALSE!
ventral stream processing is vision for perception (identification)
dorsal stream processing is vision for action
Optic Ataxia
ability to recognize an object; inability to guide hand accurately to an object
Visual agnosia
unable to recognize common objects, unable to use visual information to grasp objects accurately
Hearing is classified as…
exteroceptive (from the text book)
