Investigating the basis for the sentence comprehension deficit in Parkinson's disease

Howard Geyer, Murray Grossman

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

We sought to determine whether patients with idiopathic Parkinson's disease (PD) have sentence comprehension impairments because of a compromised grammatical parser or difficulty attending to subtle grammatical features of sentences. We assessed syntactic-thematic linking rules in sentences by asking 25 non-demented PD patients to judge whether a transitive "target" sentence entails an intransitive "probe" sentence (e.g. "The girl drowned the swimmer" → The swimmer drowned). Sentences contained either simple transitive verbs that map syntactic roles onto thematic roles in a canonical fashion, or lexical causative verbs that have an atypical syntactic-thematic linking rule that is not explicitly signaled. These verbs were set in either an active voice sentence that maps syntactic roles onto thematic roles canonically or a passive voice sentence that remaps syntactic roles onto thematic roles in a fashion that is signaled explicitly by surface sentence features. PD patients were significantly impaired on this task. This was due to their difficulty understanding sentences with lexical causative verbs, a deficit that was evident in 60% of individual PD patients. The passive voice did not interfere with sentence comprehension. In order to confirm that the deficit was due to the subtle nature of the syntactic-thematic linking rule rather than a compromised grammatical parser, we presented sentences in the periphrastic voice that is grammatically demanding but explicitly states the thematic roles associated with verbs. PD patients' comprehension of sentences with lexical causative verbs improved when cast in a periphrastic voice. We conclude that sentence processing impairments in PD are due in part to a compromised executive system that subserves attending to subtle attributes of sentence structure.

Original languageEnglish (US)
Pages (from-to)191-205
Number of pages15
JournalJournal of Neurolinguistics
Volume8
Issue number3
DOIs
StatePublished - 1994
Externally publishedYes

Fingerprint

Parkinson Disease
deficit
comprehension
Disease
Syntax
Sentence Comprehension
Parkinson's Disease
Comprehension Deficits
Thematic Roles
Thematic
Causative Verbs
Passive Voice
Verbs
Impairment

ASJC Scopus subject areas

  • Language and Linguistics
  • Cognitive Neuroscience
  • Clinical Psychology
  • Experimental and Cognitive Psychology
  • Linguistics and Language

Cite this

Investigating the basis for the sentence comprehension deficit in Parkinson's disease. / Geyer, Howard; Grossman, Murray.

In: Journal of Neurolinguistics, Vol. 8, No. 3, 1994, p. 191-205.

Research output: Contribution to journalArticle

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