Abstract
Abstract Several researches concerned about aphasic patients have noticed that specific injured brain regions may be related to specific language deficits. It was suggested that left prefrontal cortex is incolved in verb processing while left temporal cortex is crucial for noun processing. Recently, this topic has been expanded to the field of degenerated cases, especially Alzheimer’s disease (AD) and Parkinson’s disease (PD). This thesis aimed to assess the ability of retrieving nouns and verbs in AD and PD patients by using Picture naming tasks, Word generation task, and Narritive task. The result revealed that AD patients were impaired in both nouns and verbs retrieving ability, which consists with the result in Drucks et al. (2006), Masterson et al. (2007), and Lee et al. (1998), suggesting that AD patients’ performance is an exaggeration of the pattern of NCs. However, Results of PD patients showed that there was no significant difference between their ability and the Normal Controls’ (NC) in all three tasks, pointed out that Mandrain PD patients showed an inconsist deficit condition comparing with Indo-European PD patients.