Chapter 7 Flashcards
Spatial rule
Multi-modal integration is more likely or stronger when the constituent uni-sensory stimuli arises from approximately the same location
Cross modal integration and perception
Hearing, touch & vision appear to be integrated via space
Single cell recordings in animals indicate that neurons in the parietal lobe integrate sensory information (vision, touch, hearing)
Combination of multiple sensory inputs is essential for us to comprehend our surroundings
Temporal rule
Multi-sensory integration is more likely or stronger when the constituent uni-sensory stimuli arise at approximately the same time
Proprioception
The ability to sense the position and location and orientation and movement of the body and its parts
Attention
Process by which certain info is selected for further processing and other info is discarded
Important for integrating and prioritizing info across senses & incoming info
Inattentional blindness
Failure to consciously see something because attention is directed away from it
Balint’s Syndrome
- bilateral damage to parietal lobes
- severe spatial disturbances (attention or representation)
Neglect
Unilateral damage to parietal lobe (usually right lobe damaged)
Right hemisphere lesions lead to failure to attend to the left
Simultanagnosia
Symptom of Balint’s syndrome
Inability to perceive more than one object at a time
Gaze Apraxia (Symptom of Balint's syndrome)
Physical inability to change location of visual fixation
Inability to voluntarily guide eye movements
Optic Ataxia (Symptom of Balint's syndrome)
Inability to reach in the proper direction for an object under visual guidance
In coordination of eye and hand movement
Possible mechanisms of neglect
Loss of neurons dedicated to representing parts of space
Failure to shift attention
Combination of the two
Location is relative
Brain doesn’t regard space as a continuous single entity
Egocentric space
A map of space coded relative to the position of the body
Integration of all sensory information in relationship to you
Prioritizing information (near vs.far)
Interacting with the world (reaching & grasping)
Retinocentric space
A map of space coded relative to the position of eye gaze
Allocentric space
A map of space coding the locations of objects and places relative to each other
Retinocentric Space (Types of neglect and different types of space)
The left side of space is ignored
Egocentric space (Types of neglect and different types of space)
Near vs far space
Shaving only one side of face
Object based space
Types of neglect and different types of space
Half of each object is ignored
Neglect patient eats half of the food on their plate
Neglect is not just restricted to vision but can also apply to other senses
Some neglect patients show right skewed bias in identifying the location of sound
Primary somatosensory cortex
Main response receptive area for the sense of touch
Sensory homunculus
Model of which areas of the body are most sensitive
Hands, lips & tongue extremely sensitive
Legs and feet less sensitive
