Attention 3 Flashcards
Change blindness
When change in visual stimulus is introduced and goes unnoticed
Surprisingly difficult to detect changes
With change blindness
There are certain conditions where
Change blindness is more likely
What do change blindness and inattentional blindness have in common
Failure to perceive things easily seen once noticed, both due to lack of attention
If change/inattentional blindness occurs due to early selection
The stimulus should never be perceived
If it occurs due to late selection
The stimulus might be perceived but not remembered
Differences between change blindness and inattentional blindness
Memory plays a role in change blindness but not inattentional blindness, and change blindness can occur even if finding the change is the actual task but inattentional blindness typically occurs when observer is performing another task
Four main lobes
Frontal lobe, parietal lobe, occipital lobe, temporal lobe
Frontal lobe is located
In the front
Parietal lobe is located
At the top
The occipital lobe is located
In the back
The temporal lobe is located
At the bottom
Large scale
Areas in different lobes of the brain
Attentional
Activity modulated by attention
Networks
Areas tightly interconnected by neuronal pathways, often activated together
Two major attention network
Dorsal attention network and Ventral attention network
Dorsal attention network main components
Frontal eye field and intraparietal sulcus
Ventral attention network main components
Ventral frontal cortex and temporoparietal junction
Dorsal attention network roles
Top down control, goal driven orienting, left and right hemisphere
Ventral attention network
Bottom up control, stimulus driven, mainly right hemisphere
Spatial neglect is caused by
A damage to the ventral attention network
Spatial neglect is almost always on
The left side
Spatial neglect patients are usually
Unaware of deficit
Extinction
Typically seen in recovering patients, one stimulus on neglected side is perceived and two stimuli on non neglected side is perceived
Extinction suggests that
Spatial neglect is not a visual deficit but an attentional deficit
Neglect should be considered __ not a perceptual deficit
Attentional
Neglect can affect _____ as well as perception of space
Imagination
Spatial neglect is
Quite frequent, 40% of patients with right hemisphere lesions
In about 10% of patients, ____ ______ even after more than 6 months
Severe deficits
In clinical setting, ____ _____ is often not correctly diagnosed
Spatial neglect
If spatial neglect is not diagnosed,
There are no rehabilitative efforts
Ideally there is a standardized assessment for spatial neglect
By neuropsychologists
