Language Flashcards
What are the 8 areas of the perisylvian language arc?
- auditory senses
- cranial nerve VIII
- Pons
- Primary auditory cortex (Heschl’s gyrus/41)
- Secondary auditory cortex (Wernickes)
- arcuate fasiculus
- Broca’s area (44/45)
- Motor areas (face area, speech motor area)
What happens if you damage the auditory aparatus?
- ear or both ears
- unable to hear/deaf
What happens if you damage the auditory nerve?
- hearing loss/deaf
What happens if you damage the Heschl’s gyrus?
- hearing loss/deaf categorized as cortical deafness
What happens if you damage Wernicke’s area?
- receptive language problems
What happens if you damage Broca’s area?
- language production problems
What happens if you damage the arcuate fasciculus?
- understandable language, repetition difficulties (phonemic paraphasias)
What are the four core language skills?
- categorization
- labeling categories
- sequencing behaviour
- mimicry
What is categorization important for?
- designates certain qualities to specific concepts
- makes it easier to perceive information and retrieve it later when needed
What is labeling categorization important for?
- attaches words to different concepts
- categorization system can stimulate word forms about that concept
- words can also cause the brain to evoke concepts
What is sequencing behaviour important for?
- left hemi helps order vocal movements used in speech
- can also sequence face, body and arm/hand movements used to produce nonverbal language
What is mimicry important for?
- fosters language development
- infants prefer to listen to speech
- can make sounds used in all languages
- mirror neurons in the frontal cortex help children mimic sounds they hear
What are the components of sound-based language?
- phonemes
- morphemes
- syntax
- lexicon
- semantics
- prosody
- discourse
What are phonemes?
- smallest sound units
What are morphemes?
- smallest meaningful units of a word
What is syntax?
- admissible combo of words in phrases and sentences (grammar)
What is semantics?
- meanings that correspond to lexical items
What is prosody?
- vocal intonation
What is discourse?
- linking sentences to constitute a narrative
What are the steps in the Wernicke-Geschwind?
- comprehension is extracted from sounds in Wernicke’s area
- passed over the arcuate fasiculus pathway
- to Broca’s area to be articulated as speech
What is the dual language pathway?
- dorsal language pathways (phonemes)
- ventral language pathways (semantics)
What can transcranial magnetic stimulation (TMS) do in speech?
- interfere with speech
- prime neurons to enhance reaction times
- evaluate connections
- be used to map speech regions in the brain
- aid in cortical contributions to language
- examine neural changes after damage
What components are more ventral and more dorsal in broca’s area?
- semantic processing is more ventral
- phonological processing is more dorsal
What is the left hemispheres role in language?
- parts/details
- learned information
- explicit language
- grammar/syntax
What is the right hemispheres role in language?
- global/hollistic
- novel information
- implicit language (tone/melody)
- complex understanding