7.1 Cognition and Dementia Flashcards
located near the modality they serve (vision, sensory, motor), unimodal
first order association cortex
inputs from several modalities
multimodal association areas
decisions and executive function
anterior association area
integrates sensory input
posterior association area
spatial recognition, relationships
dorsal perceptual path
object recognition, faces
ventral perceptual path
normal score is 30 points, not great for non-dominant hemisphere (patterns) and executive
mental status exam
aphasia, affects Broca’s or Wernicke’s areas or surrounding cortex
focal language encephalopathy
chronic cell death (idiopathic), commonly bilateral
degenerative focal encephalopathy
several areas affected, alzheimers
diffuse encephalopathy
semantic area, decodes words
Wernicke’s
fluent speech (nonsense), can’t understand commands
wernicke’s aphasia
surrounding cortex damage, fluent speech and repetition, poor understanding
transcortical sensory aphasia
converts intent into words
broca’s area
non fluent speech, can’t repeat, intact understanding of words
broca’s aphasia
intact understanding and repeat, not fluent
transcortical motor
connection b/w broca’s and wenicke’s areas, fluent speech, intact understanding but can’t repeat
conduction aphasia
unable to read but can write, disconnection of visual cortex to Wernicke’s area, PCA stroke
alexia without agraphia
multiple cognitive deficits that are aquired and persistent
dementia
AD, vascual, PD, Lewy body disease
most common causes of dementia
posterior cortical effects, no motor problems early
alzheimer’s
subcortical effects, motor and cognitive problems
parkinson’s
dys-executive, change in personality, inappropriate with fully intact memory, language, frontal dementia
Pick’s disease
