Class 20 - Topic 11 - Concepts

formats of concepts

modal, amodal

modal

grounded in the sensory modalities

amodal

abstract and independent from the sensory modalities

evidence for amodal

invariant cell, these are crucial for semantic memory

damage to atl causes

semantic dementia

semantic dementia

gradual loss of conceptual knowledge, but vision, language, and understanding are generally in tact

agnosias are

visual disorders

aphasias are

language disorders

dementias are

progressive disorders that have large-scale impacts

evidence for modal representations

reading words in fmri activitaes certain brain areas, concepts are emobied/grounded in the senses that comprise them

semantic info may be ____ across the brain

distributed

mental imagery debate theories

depictive, propositional

depictive

yes, we really form images in our head

propositional

no, we represent objects using symbolic descriptions

evidence for imagery

mental rotation, tms over v1

charles bonnet syndrome

patient ‘sees’ multicolored objects after she touches them although she is blind

hub that integrates information from sensory areas

atl

aphantasia

inability to mentally visualize

memories are stored ____ the brain

across

short term memory

holding infor in mind for short periods of time

working memory

actively manipulating info in your mind

what area maintains the activity of sensory areas relevant for the task

lateral prefrontal cortices (PFC)