Left Hem. - Arcuate Fasiculus Flashcards Preview

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Flashcards in Left Hem. - Arcuate Fasiculus Deck (7)
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1
Q

Arcuate Fasiculus

A

Bundle of axons forming reciprocal connections between Broca’s Area and Wernicke’s Area

2
Q
  • Damage to these axons =>
A

Conduction Aphasia

3
Q

Conduction Aphasia

A
  • Symptoms can include meaningful, fluent speech, fairly good comprehension, but very poor Repetition
    - i.e. Cannot repeat unfamiliar or nonsense words
    - May produce Phonemic Paraphasia
  • plays a role in limiting coordinating between Broca’s (initiate sound) and Wernicke’s (comprehension) = they’re not communicating
4
Q

Phonemic Paraphasia

A

= substitute similar sounding word, diff meaning (“Pike” > “Pipe”)

5
Q

When asked to repeat familiar words, sometimes produce synonyms instead

A
  • e.g. Examiner: The auto’s leaking gas tank soiled the roadway

Patient: The car’s gas tank leaked and made a mess on the street

  • i.e. ?Can access meaning and somehow convey that to production mechanism, but not via direct route?
6
Q

So Arcuate Fasiculus probably for “Rehearsal” of….

A

….just-heard and/or about-to-be-spoken words (talk to self)
- i.e. Aspect of a particular form of Working Memory called the “Phonological Loop”

7
Q

Phonological Loop

A

Aspect of a particular form of Working Memory