Neuroanatomy Draw It To Know It

24. Cognition 429

DRAWING 24-1 Language Disorders

APHASIA FLUENCY COMPREHENSION REPETITION

Broca’s Non-fluent Preserved Impaired

Wernicke’s Fluent Poor

Transcortical

motor

Transcortical

sensory

Conduction

Global

Mixed

transcortical

Non-fluent Preserved Intact

Fluent

Fluent Preserved

Non-fluent Poor

Non-fluent Poor Intact

*In 90% of individuals, language

lateralizes to the left hemisphere

Impaired

Impaired

Poor single-

word

Broca’s (B): Inferior frontal gyrus, precentral

gyrus, basal ganglia, insula, & white matter

Wernicke’s (W): Posterior superior temporal

gyrus, & supramarginal & angular gyri, &

neighboring parietal and temporal lobes, & insula

Global: Extensive left middle cerebral

artery territory

Transcortical motor (TM): Dorsolateral

prefrontal cortex with perisylvian sparing

Transcortical sensory (TS): Temporo-parietal-

occipital junction with perisylvian sparing

Conduction (C): Arcuate fasciculus

(& supramarginal gyrus & insula)

Mixed transcortical: Ant./middle & middle/post.

cerebral artery watersheds; perisylvian sparing

TMB W

TS

C

Impaired

Intact

*Echolalia can occur in all

transcortical aphasias