10-1 Flashcards
divided attention
multitasking
* Ability to focus on multiple forms of sensory information
* Can be investigated in an experimental condition
dual-task paradigm
- Primary task & secondary task
- Measure performance on both
- Can be manipulated with different
interventions
**performance of both tasks will be worse
than if performed separately
Selective attention
- Ability to focus attention on one specific task
Exogenous
external, reflexive
* Focus on objects/stimuli that stand out
Endogenous
internal, voluntary
* Incorporates intention, goal orientation, previous knowledge
Blindness
- Due to attentional demand, can
experience types of “blindness” to your
environment
inattentional Blindness
miss something
Change Blindness
don’t notice something
has changed
Primary Visual Cortex (V1)
Located within the Occipital Lobe
V1 is arranged “retinotopically”
* Specific groups of neurons
represent/respond to specific parts
of our visual field
-All visual information passes
through the Lateral Geniculate
Nucleus (within Thalamus)
Secondary Somatosensory Cortex
-Involved in DORSAL STREAM
* Located in the posterior parietal lobe
* In complex movement sequences, role in:
* Confirming which movements have already
taken place
* “Deciding” what movements come next
V1
- Receives visual signal from eyes
- Passes through visual association areas
- Relays information to two primary areas
Inferotemporal Lobe
involved in ventral stream
* Involved in visual memory (input from the hippocampus)
* Role in object recognition
* Helps understand complex stimuli like faces and scenes
Dorsal Stream
V1 Secondary Somatosensory Cortex
* Object location and motion
* Detecting and analyzing movements
* Spatial awareness and guidance of
action
Apraxia
- Damage to the Secondary Somatosensory Cortex
- Movement disorder which impairs the ability to perform tasks
or movement, especially sequences - Does not impair ability to plan or execute movements, but
disrupts how they are performed leaves movements
fragmented and confused
Ventral Stream
V1 Inferotemporal Lobe
* Object recognition and form
representation
Visual Agnosia
- Damage to the Inferotemporal Lobe
- Disorder which impairs the ability to recognize objects
- Does not impair ability to SEE object, but instead to process
and understand what the object is
Prefrontal Cortex:
decision making centre of the brain
* Decide what response you want to have to your environment
* “Should I make response x or response y?”.
Prefrontal Cortex projects to the Premotor Cortex
- At this stage we answer:
What do I need to do in order to
carry out the chosen response? - Premotor cortex will:
- help plan movement
- project to other motor areas to
carry out desired movement
** deciding on response and ability to carry out that response are influenced
by the amount of attention you are paying to the task (limited resource)
