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Neuroscience (language production and comprehension) - Coggle Diagram
Neuroscience (language production and comprehension)
Broca's area
found in the dominant hemisphere of the brain
opposite to dominant hand, so usually the left-side
primary functions are language production and comprehension
assists in the speech-motor movements
front of Broca's area is related more to semantics, whereas the back portion is related to phonology
also necessary for language repetition, gesture production, sentence grammar and fluidity, and the interpretation of others' actions.
Broca aphasia occurs when blood supply to the Broca area decreases significantly
results in partially losing the ability to produce spoken and written language
patients are said to have 'telegraphic speech", meaning they cannot create full sentences, only two or three words at a time
individuals with Broca's aphasia know what they want to say, but cannot physically get it out
also lose the ability of repetition and rehearsal
increased effort if required to comprehend
causes include strokes or haemorrhaging, head trauma, tumours or infectious masses
Wernicke's Area
found in the left cortex of the cerebral hemisphere
controversy surrounding where is it actually located
Wernicke's aphasia occurs when blood supply to this area decreases significantly
results in a speech deficit
patients can create sounds that sound like fluent speech, but don't have any meaning
they put together random syllables, made-up words or replace one words for another without it making any sense
also suffer with the inability to understand language
originally thought it was mainly used for comprehension, however it may also be involved with speech production
is just one component of a large network involved in understanding language
Wernicke-Geschwind model
theorized that the Wernicke’s area generated plans for speech and sentences, and the Broca’s area was responsible for taking the plans and generating the movements
the Broca’s area sends information about intended speech to motor cortex, which then signals the muscles to create the vocalization