Language and the Brain Flashcards
The Wernicke-Geschwind Model assumes that language is _______________________________
almost exclusively left-hemisphere dominant
The Wernicke-Geschwind Model states that for language, the _______ lobe and ________ lobe are most crucial.
frontal lobe and temporal lobe
Frontal lobe areas: (2)
Broca’s Area
Primary motor cortex
Broca’s area
plans and organizes speech movements
Primary motor cortex
controls speech muscles (articulatory organs)
Broca’s Aphasia
Motor movement/retrieval issue
- Damage of left hemisphere frontal lobe
- Characterized by slowed, halting speech
- Extreme difficulty accessing words
- Good comprehension
Temporal lobe areas (2)
Wernicke’s area
Primary auditory cortex
Wernicke’s area
storage and retrieval of words and meanings; grammatical rules
Primary auditory cortex
perception of auditory stimuli
Wernicke’s Aphasia
Large left hemisphere lesions
- Characterized by fluent, but nonsensical speech
- Poor comprehension
- Often grammatically correct
Arcuate Fasciculus
Connects Broca’s area and Wernicke’s area
Dual stream model of language processing - ____ streams
2 streams
Dorsal stream
Ventral stream
Dorsal stream
map speech to articulatory representation
- Involved in verbal repetition
- Left Hemisphere dominant
Ventral stream
map speech to meaning
- Involved in understanding speech
- Bilateral - both left and right hemisphere!!!!!
How do the Wernicke-Geschwind Model and the Dual Stream Model of Language Processing differ?
The ventral stream is bilateral!!
Wernicke’s says left-hemisphere only
Duel stream pushes for both
