Association Cortex--Dr. Ted Flashcards
Cognition can be considered which 3 things?
recognition
selective attention-to external stimuli & internal motivation
planning
What is the cognitive function of the parietal lobe?
Attend to complex stimuli in the external and internal environment
What is the cognitive function of the temporal lobe?
Identifying the nature of complex information and matching it to a stored template
What is the cognitive function of the frontal lobe?
Planning and executing a behavioral response to stimuli
What would be the effect of a lesion in the right parietal lobe?
Spatial distribution of attention
Contralateral neglect syndrome
Disruption in spatial frame of reference-where your body ends & the world begins
If you had your association cortex replaced with another person’s…then would you still be you?
No. different connections based on individual experiences
What is the effect of a lesion to the right temporal lobe?
Objects agnosia This may be more-or-less total or partial
Prosopagnosia is a partial object agnosia in which the failure is in the ability to identify individual members of a category or set while retaining the ability to identify the category
What is object agnosia?
a loss of ability to recognize objects
What is the effect of a lesion to the right frontal lobe?
Aprosodias
“missing the point”
Motor program deficits
What is aprosodias?
inability of a person to interpret emotional prosody
prosody: ranges of rhythm, pitch, stress, intonation
What is the effect of a lesion to the left frontal lobe?
Expressive aphasias
Motor program deficits (typically dyspraxia)
T/F It is easier to discern a left frontal from right frontal lesion than a left parietal from a right parietal lesion.
False. Easier to differentiate lesion b/w lobes that are more posterior (parietal) than it is to the frontal lobes.
What is the effect of a lesion to the left temporal lobe?
Anomia -this can be considered an analogue to object agnosia in which the failure to recognize is for symbols
What is the effect of a lesion to the left parietal lobe?
Receptive aphasias (temporal-parietal border)
Acalculia
Right-left confusion
What is the effect of a lesion to the frontal lobe generally?
Loss of the ability to form or follow plans—thus overly reactive to immediate stimuli.
Defects in the impulse to act (too much or too little)
Dysexecutive syndrome.
Apparent loss of motivation
Disinhibition
With left neglect syndrome–what happens to your understanding of your surroundings?
it’s not just that you ignore your left half of your body…you can’t conceive that there is a left side of your universe.
What is aphasia?
involves the compromise of essential language (symbolic) functions while leaving sensory and motor components of verbal (and written) communication intact
What are some major aphasia syndromes?
Broca’s aphasia a.k.a. expressive aphasia
Wernicke’s aphasia a.k.a. receptive aphasia
Conduction aphasia a rare disconnection syndrome
What is left-handedness associated with?
Is associated with greater variability as opposed to superiority or inferiority of a given talent, skill—or disability
Spatial distribution of visual attention is mainly covered by which hemisphere?
the right hemisphere! does most of it. greater conc’n on left side.
The left hemisphere helps a little bit with right hemifield of vision.
Why is right hemi-neglect more rare than left?
b/c you would need a lesion on both sides of the brain to achieve this deficit
T/F Lateralization is more important in the posterior brain than the anterior brain.
True.
How can you tell if someone has dyspraxia?
they are unable to speak but can write etc.
What is anomia?
difficulty recalling words or names
