Neural Circuits of Language And Communication Flashcards
Cognitive Neuroscience def (1)
the study of the neurobiology that underlies (or creates) cognition
Language def (2)
verbal message and some of the paraverbal components.
2 proprieties are common to every language:
* decomposable
* combinable
Communication facts (3)
everything that conveys a message
- 93 % of communication is non verbal.
- Only 7 % of the message is conveyed by language
- irony, mood, emotions … are components that rely on inferential
processes to be detected
Components of L&C (6)
Phonetic
Phonology
Lexicon-Semantic
Morphology
Syntaxis
Pragmatic (Communication)
Phonetic def (1)
Elaborates linguistic sounds based on their physical characteristic
Phonology def (1)
Distinguish phonemes based on their distinctive tracts; it plans the sequential order for a string (i.e. a word)
Lexicon-semantic def (1)
Contains conceptual representations of meanings and the verbal etiquettes associated with them.
Morphology def (1)
Elaborates morphological aspects of words (such as the –s at the end of the words when they’re plurals)
Syntaxis def (1)
Elaborates sequences of words according to the specific rules of a language
Pragmatic communication def (1)
Explicit the use of the language in a context
Classic language model: Speech input/output flowchart (4)
1) semantics/concepts
2a) Wernicke’s -> Auditory cortex - speech output
2b) Broca’s -> motor cortex -> speech output
3) Wernicke’s <-> Broca’s
image
Lateralisation of the brain (3)
- left dominance is established
- bilateral involvement when it comes to learn a new language
- left dominance for proficient bilinguals in both L1 and L2
New models – Hickok & Poeppel
2007 - dorsal + ventral stream (2)
dorsal stream: Speech production (Broca’s)
ventral stream: speech recognition + comprehension (Wernicke’s)
Dual stream model (3)
image
- Dorsal and ventral streams
- spectrotemporal analysis
- Phonological network
etc.
Approximate anatomical correlates (4)
- superior temporal gyrus (STG) = involved in spectrotemporal analysis
- the posterior half of the STS = implicated at phonological-level processes
- the ventral stream is bilaterally organized with a weak left-hemisphere bias. The more posterior regions of the ventral stream, posterior middle and inferior portions of the temporal lobes correspond to the lexical interface, which links phonological and semantic information, whereas the more anterior locations correspond to the proposed combinatorial
- dorsal stream, = strongly left dominant. The posterior region of the dorsal stream corresponds to an area in the Sylvian fissure at the parietotemporal boundary (area Spt), which is proposed to be a sensorimotor interface, whereas the more anterior locations in the frontal lobe, probably involving Broca’s region and a more dorsal premotor site, correspond to portions of the articulatory network