Final terms Flashcards
(43 cards)
Metalinguistic Awareness
Looking at formal properties rather than intended meaning of utterance (sensitivity to grammaticality, synonymy, rhyming etc.)
Broca’s Aphasia
- Paralyzed patient couldn’t speak but had other normal functions
- Lesion on left frontal lobe
- Concept of cerebral dominance of language in left hemisphere
- Halting, slow, speech timing and normal sentence intonation are disturbed
- Substitution of one sound for another
- +zero morphology languages omit morphology, -zero morphology languages substitute morphologies
- No problem with lexicon
- Agrammatism- lack of syntax, diminished morphology
- Not merely speech deficit or production deficit, rather loss of morphosyntactic competence
- Semantic irreversibility- patient’s ability to reverse syntax (the girl is loved by the boy) is impaired
Wernicke’s Aphasia
- Affects posterior cortex in left hemisphere (between parietal and temporal)- second langauge area
- Fluent speech but made no sense, lack of comprehension
- Meaningless neologisms- paraphasia
- Difficulty recalling lexical items especially nouns (anomia)
- Reading and writing very impaired
Conduction Aphasia
Like Wernicke’s aphasia but with good comprehension- semantically anomalous
Function of left hemisphere
Reasoning, math, logic, language
Function of right hemisphere
holistic function (pattern matching, face recognition), spacial abilities, processing of non-linguistic sounds, pragmatic knowledge
Manner of Acquisition hypothesis
-Formally learned languages are not less lateralized than the native language
Stage hypothesis
Initial stages of language have more RH movement, growing proficiency leads to L2 being more left lateralized
Modified stage hypothesis
L2 is less lateralized only in adults learning L2 in a naturalistic setting without formal instruction (no evidence)
Amnesia vs. Aphasia
- Amnesia- explicit knowledge is affected
- Aphasia- implicit knowledge is affected
Motivation
In L1 and informally learned L2, limbic system is highly involved because of high motivation/ emotion, more long term memory of language. Not present in formally learned L2.
Selective Aphasia
symptoms only in 1 language
Parallel recovery
all languages recovered to same extent
Selective recovery
only one language is recovered
Differential recovery
one language is recovered better
Antagonistic recovery
Languages are not concurrently available- as L2 becomes available, L1 regresses and disappears
Blending recovery
Patient unable to speak one language at a time, mixes both
Differential Aphasia
Proposed by Albert and Obler, Silverberg and Gordon, patients show one type of aphasia in one language and another type in another- Paradis is skeptical that this exists. More like differenetial recovery
Bilingual Aphasia test
Test which measures language ability- attention to cross language equivalence, adapted
Alternating Antagonism
available and unavailable languages switch more than once over time
Procedural declarative memory model
In dementia and alzheimers patients, more damage to L2, in aphasia patients more damage to L1, lexical in both cases- structural difference between languages has no effect on recovery from aphasia
Activation threshold model
-Item is activated when sufficient amount of positive neural impulses have reached its neural substrate, amount of impulses necessary to activate the item constitutes activation threshold, when item is activated its threshold has to be lower than competitors from other languages. Production is more difficult because of self activation. Without use, threshold rises again. Different thresholds can represent different recovery patterns.
Inhibitory control model
different excitatory and inhibitory resources are involved in selection or deselection of a lang- executive control- in charge of inhibiting or activating one language over the other. Language task schemas- charged with inhibiting or activating of output of lexicosemantic system depending on whether it is compatible with the schema- charged with selection of appropriate lexical item- same types of recovery but with inhibition instead of threshold
Atypical behavior in translation
- inability of aphasia patients to translate despite good control of two languages
- involuntary translation- paradoxical translation- can only translate between more prof to less prof lang- opposite from most bilings, translation without comprehension- can translate info patient cannot understand- dissociation between production/ comprehension and translation