Association Cortex Lec28 Flashcards
Major Association Cortices (3)
- temporal (what pathway)
- parietal (where/when pathway)
- frontal
__ association cortex is involved with Auditory prosody, syntax
temporal
frontal association cortex is involved with (3)
Spatial, object working memory
! Planning
! Withholding responses
Association Cortex:
what layers do inputs come into?
come in at all levels, except inputs
from the thalamus only go to layer 4
(the granular layer)
where does input to the association cortex from the thalamus come into?
only layer 4
Outputs from layers 2 and 3 go to
other cortical areas
layer 2 or 3 cells are bigger, can go
to opposite hemisphere?
layer 3
Outputs from layer 5 go to
subcortical structures like the striatum, superior colliculus,
pons, and tegmentum
Outputs from layer 6 go to the ___
thalamus
achromatopsia - impaired ___ recognition
color
- agnosia - impaired object recognition
- achromatopsia - impaired color recognition
- prosopagnosia - impaired face recognition
- alexia - impaired word recognition
- receptive aphasia - impaired word interpretation. Input problem, ex. Wernicke’s • expressive aphasia - impaired word usage. Output problem, ex. Broca’s
- apraxia - object utilization / tool use deficits (
a lesion where would cause all of these?
temporal association areas/ventral stream
apraxia – deficits with
object utilization / tool use deficits
(impaired motor planning / ability to
carry out learned purposeful movements)
The ___ does “Metacognition.”
Prefrontal Cortex
___ is the meaningful selection of behavior to achieve desirable outcomes and avoid undesirable ones
metacognition
metacognition invovles what 3 things
integrating sensory info + pausing motor responses + monitoring outcomes
define association cortex
everything that is not a primary motor, primary sensory, or premotor area
association areas receives inputs from multiple areas and tie them together in some manner that was not possible in the
intiial sensory areas
generate more meaningful repsonses
all neocortical association areas have at least ___ layers
5, most have 6
dorsal is the where stream goes from v1 to
occipital to parietal
damage to __ pathway can cause –
inability to describe context of object, cant
use visuospatial cues
hemispatial neglect
dorsal pathway
___ projection: to develop a memory for what
the object is recognized by the ventral stream
ventral prefrontal cortex
what happens if primary visual areas are damaged but the temporal association areas are spared
blindsight
pt doesnt know they can see
e.g. show them stimuli.. say they cant see then ask them to just name whatever comes to mind and they end up saying what they could see
temproal association areas have to cimmunicates with v1 to
have ___ awareness of what you are seeing
concious
___ hemisphere in the parietal love that
drives the intention/attention
right
schizophrenia and severe adhd dont
have activation of ___ cortex
prefrontal
facial recognition neurons are located in the
fusiform gyrus (temporal lobe)
planning neurons are found in the
frontal cortex
attention neurons are found in the
parietal lobe
reach neurons are found in the
parietal lobe
grasp neurons are a part of the ___ pathway
what/ventral
mirror neurons are found in the
inferior frontal gyrus
instructed delay neurons around found in the
prefrontal cortex
Brodmann Areas represent a particular anatomical structure corresponded to a particular ____.
function
