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Adult Language Disorders > Dominance Related Issues > Flashcards

Dominance Related Issues Flashcards

1
Q

Cerebral Asymmetry

A

Biologic landmark of the human cerebral evolution

asymmetrical control for language

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2
Q

Equivalent lesion in right hemisphere

A

No aphasia

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3
Q

Visual-spatial deficits

A

RH medial functions

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4
Q

Hypotheses of cerebral dominance

A
  1. Equipotentiality: both sides of the brain are equally as capable of serving language
  2. LH dominance –> diluting effects of RH dominance (left brain becomes more dominant for language around age 5)
  3. RH for nonlinguistic functions: right hemisphere takes the lead on nonlinguistic functions previously served by LH
  4. LH damage = interruption of nonlinguistic behaviors
  5. Intact RH = possible compensatory source in recovery
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5
Q

Implicating Theories: The Coarse Coding Hypothesis

A

Differences: ways of access to semantic representations & ways semantic representations are suppressed

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6
Q

Implicating Theories: The LH semantic coding

A

activating small fields, inhibiting all but central features (brings precision)

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7
Q

Implicating Theories: RH Coding

A

Activation of large semantic fields (brings redundancy – too much info)

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8
Q

Implicating Theories: Suppression Deficit Hypothesis

A

Reconciliation of multiple meaning hampered due to impaired suppressive strategy (activation of multiple representations for words)

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9
Q

Implicating Theories: Cognitive Resource Hypothesis

A

Attentional allocation and task demand

RD patients falter on high concentration tasks

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10
Q

Methods to study dominance

A

lesion-to-stroke data, dichotic listening, tachistoscopic data, commissurotomy

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11
Q

Visual-Tactile association

A

right hemisphere can match and identify objects through touch

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12
Q

RH recognition, but no naming

A

patient can read the word “nut” and he will pick up a nut, but cannot say the word

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13
Q

Left Brain

A

right visual field, left olfaction, speech, writing, main language center, calculation

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14
Q

Right Brain

A

Right olfaction, spatial abilities, simple language comprehension, nonverbal ideation, left visual field

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15
Q

RH Cog-Communication Profile

characteristics if someone has a lesion in the right brain

A

Disorders of contextually-based communication from disturbed underlying cognitive, perceptual, and pragmatic processes

  1. copious output with poor communication
  2. superficial treatment of information/question
  3. breakdown on communicative demands
  4. inappropriate verbal output on careful scrutiny
  5. often confabulatory speech
  6. literal interpretation of question
  7. irrelevant/excessive details
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16
Q

RH communication profile (if lesioned)

A
  1. Reduced emotions, melodies, pitch contours, creative language functions
  2. No organized information, isolation of salient points, or integration of crucial information
  3. Addresses to but no answer
  4. Elusive nature of the deficit
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17
Q

Nonlanguage functions of the right brain

A
  1. Visual functions: recognition of visual stimuli, image generation, mental rotation, visual-spatial attributes
  2. Block designs
  3. Tactile-Visual orientation
  4. Reproduction (copying, memorization of graphic stimuli, Figure of Rey)
  5. Visual-Spatial Orientation (spatial object/shape placement, location relationship, map reading, reading/writing deficits –> no space, spelling errors, additional strokes, extra capitalization)
  6. Orientation to time
  7. Musical Processing (Naive -RH-vs. Experienced -LH- subjects)
  8. Attention
  9. Visual Inattention/neglect
  10. Affection/Emotion
  11. Pragmatics
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18
Q

Non-language functions of RH: Musical Processing

A

Naive subjects vs. Experienced Subjects

  1. Naive: RH for processing & identification, pitch & melody, dichotic listening, familiar melodies
  2. Experienced: analytic approach, LH for expression and information processing
19
Q

Non-language functions of RH: Attention

A

RH: Neural circuitry for both extra-personal spaces (why there is only left neglect with RH lesion, but never right neglect)
LH: Circuitry for contralateral space (still can access other side because right hemisphere will cover it)

20
Q

Divided attention

A

Executive control

21
Q

Selective attention

A

Thalamo-cortical

22
Q

Non-language functions of RH: Visual attention/neglect

A

unilateral spatial neglect, not interested in events on one side, ignorance of people on affected side, fail to carry out basic self-care tasks, dramatic recover - 85% within 3 days

23
Q

Affection/Emotion representation in both hemispheres

A

RH association with experience and expression of negative emotions. Lesion diminishes negative affection (inappropriate jocularity and lack of concerns)

LH association with positive emotions. Lesion = display of catastrophic reactions (anxiety, tears) to failures

24
Q

Right hemisphere lesion –> prosody, stress, intonation

A

flat in tone, lack of facial expression/gestures, apathy indifferent reaction, impaired sensitivity to moods in pictures

25
Q

RH lesion Pragmatic Functions

A

Insensitive to turn taking, eye contact, context sensitive language, gestures-coverbal properties

26
Q

Paralinguistic Tasks

A

Jokes, Metaphors, Idioms

27
Q

Eliott Ross’ Work: looked at prosody of a variety of patients

A

Inadequate consideration of paralinguistic functions
Prosody: intonation, melody, pauses, stress, accents, attitudes

Dyprosody: Parkinson’s
Hyperprosody: Manic patients
Hypoprosody: Broca’s aphasics

28
Q

Kinesis

A

study of limb, body and facial movements with nonverbal communication

29
Q

Pantomimes

A 
referential purposes (LH property)
motions with meaning
30
Q

Gestures

A

non referential - enhance communicative content (don’t carry, but add meaning)

31
Q

Goodglass and Kaplan ideas regarding Kinesics

A
  1. pantomime decoding disorders in aphasics with incomprehension is due to general inability to comprehend symbols
  2. difficulty in the execution of pantomimes in aphasics with no comprehension disorders
  3. due to idea-motor apraxia
32
Q

Diagnosis of RH lesion/damage

A

No RH sensitive task
•No literal language deficit
•True deficit -on complex tasks
•Testing for: Meaningful organization, Impulsive responses, Trivial details, Differentiation between imp/trivia inf., Assimilation of contextual cues, Depersonalization of events, Literal interpretations to figurative language, Sensitivity pragmatic/context aspects

33
Q

Components of Evaluations

A
  1. Spontaneous use of affection
  2. Prosodic Content: expression of affective prosody, comprehension of affective prosody
  3. Visual comprehension of gestural components
  4. Nonverbal reasoning

Ask: What makes a joke funny, what example similes/metaphors mean, to read sentences while looking for prosody, ask for the meaning of sentences based on the stress patterns, ask to read sentences with suitable emotion

34
Q

Aphasia in Deaf Signers

A

sign language & verbal language are two DIFFERENT modes of communication

Interplay between: linguistic and spatial/visual functions (different hemispheric specialization for each process)

35
Q

Linguistic Nature of ASL

A
  1. Hand configurations, facial expressions, and shifting of body positions
  2. Phonological Code (obeys the physical constraints on motor gestures related with word formation)
  3. Internal morphology (Packs many morphologically salient units into a single lexical item tied to language modality)
  4. Complex Syntax (spatially organized)
  5. Additional attributes (Classifier, verbs, motion, and distinctive location of signs)
36
Q

Cerebral Dominance relating to static and dynamic stimuli

A

RH dominance for static signs (LH advantage in hearing subjects)

Changing pattern of cerebral dominance on computer generated moving signs (shift from the RH)

37
Q

RH lesions in deaf signers

A

Signers with RH lesion

  1. no aphasia
  2. fluent, grammatical, error free signing
  3. impaired processing of non-language spatial tasks (drawing, lock designs, attention to visual space, line orientation, facial recognition, and visual closures)
38
Q

RH in signers

A

Dominance for non-language visual-spatial functions

39
Q

Aphasia in signers with LH lesion

A

3 case studies
PD (Wernicke’s aphasia)
1. fluent-type sign aphasia
2. long strings of
motorically facile signs
3. exhibited impaired morphology and syntax
4. preserved phonology and lexical sign properties

KL (Wenicke’s aphasia)

  1. long strings of signs effortlessly
  2. wide range of syntactic morphological signs
  3. phonological impairments making frequent errors in selection of correct hand configuration, place and movement

GD

  1. grossly impaired sign output
  2. nonfluent signing reduced to single sign utterances
  3. largely referential signs without any of the required grammatical and syntactic markings
40
Q

Extraverbal

A

accompanying and/or replacing speech

41
Q

Pantomime

A

deliberate use of body/manual movements to convey a message

42
Q

Coverbal or Paraverbal

A

Behaviors accompanying speech: facial expressions, gestures

43
Q

Aphasia (pantomime)

A

impairment of pantomimic expressions and recognition

44
Q

Paraverbal behavior in aphasia

A

gestures/facial expressions: generally spared in aphasia

*usually with RH lesion

Adult Language Disorders (9 decks)

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