Chapter 11 Flashcards
Uniqueness point
The point where you can tell what the word is via the cohort model
S
Sp
Spee
Speed
Cohort model
How do we recognize spoken words?
Competition between similar sounding words
As more acoustic information is revealed the size of the cohort shrinks
Long Term Potentiation
Language
1) Frequency of associations between concepts affects the synaptic connectivity btwn neurons
2) An increase in the long-term responsiveness of a post synaptic neuron in response to stimulation of a presynaptic neuron
Influences which words are activated; words used frequently activated more often
Broca’s area
Patient Tan’s lesion
Left Ventrolateral Prefrontal Cortex (VLPFC)
Broca incorrectly concluded this area stores motor programs for speech
Wernicke’s area
Posterior aspect of the L.superior temporal gyrus
Fluent speech but nonsensical; impaired comprehension of spoken language
Broca’s area old model
Previously believed that Broca’s area and Broca’s aphasia was related to speech production and Wernicke’s area related to speech comprehension
Semantic dementia
Damage to left temporal lobe (Wernicke’s area)
Impaired: meaning of individual words
Intact: produce grammatical sentences (lack content)
Aphasia
Deficits in language production and comprehension that accompany neurological damage
Broca’s area
Located in the VLPFC
VLPFC involved I’m maintaining info in working memory
Broca’s aphasia symptoms
Agrammatism
Loss of grammar (telegraphic speech)
Loss of function words words
Loss of verbs
Loss of word endings (-s, -ing)
Language production includes
Lexicalization (Semantic)
Grammatical
Phonological
Lexicalization
Selecting a word based on the meaning one wishes to convey
Articulation
Patients with articulation problems have lesions in insula & basal ganglia
Apraxia for speech
Difficulties shaping the vocal tract (insula)
