high order cortices Flashcards
how many cortical layers do humans have
3-6
cortical layer 4…
rich in stellate neurons and receives input from thalmus
layer 5-6
pyramidal neurons and axons usually leave cortex
layer 2-3
smaller pyridmidal neurons
keys things about cortical module
- each layer has prim input and prim output target
- each area has columnar connections and horizontal connections
- similar functions=aligned radially/columns
- interneurons link w ajacent neurons w similar function
parietal….
- where(dorsal pathway)
- attention
- spatial loc
- sends info sensory->motor
contra neglect syndrome
don’t notice anything on opposide side of lesion-can see it but doesnt notice
right inferior parietal injury…
most common-deficit to personal and intrapersonal space
what can lead to diff attending to left side
right frontal, right parietal, and right temporal
what is ideomotor apraxia
cannot copy behaviors but can do it instinctively
what is contructional apraxia
cannot build things
temporal…
- what(ventral pathway)
- reccognition
- auditory and visual process
- language
wernickes area
understanding spoken and written words
-located posterior of sup temp gyrus
- 97% of ppl have it on left side
lesion to wernickes
fluen aphasia-word salad- not able to understand
brocas area
language and speech production
lesion to brocas
non fluent-understands language but cannot get out words
what are the thalamic inputs
parietal-pulvinar
frontal- mediodorsal
frontal…
planning, motivation, and impulse control
- dorsolateral and orbitofrontal
planning neurons
monkey example- fire when about to do something
lesion to planning neurons…
delayed response to things
synesthesia
using one sens or cog pathways leads to the use of another
what is main areas involved in working memory
PFC and other areas
what is seen about the parts of the brain in working memory
parietal and temporal are shown to have a delayed effect white the PFC was strong
wisconsin sorting task
