Year: 2014
Type: article
Abstract: Objective: Baddelley (2003) regarded Brodman' s area 40 [the left (lt.) supramarginal gyrus (SMG)] as a phonological store.Leff et al. (2009) reported that the most relevant lesions were the lt.superior temporalgyrus (STG) and superior temporal sulcus (STS).Anzaki et al. (2012) presented that in patients with aphasia, the most relevant lesion for digit span (DS) disorder was the lt.angular gyrus (AG) and for letter span (LS) disorder was the lt.STG.Thus, our research objective is to identify the most relevant regions for DS and LS for normal persons.Participants and Methods: Participants were 10 normal healthy persons.We made four different files, two each for LS and DS.Each LS file consisted of 5 sets.One set consisted of 5 s white noise (WN), 10 s rest, and 5 Japanese syllables.Each DS file consisted of 5 sets.One set consisted of 5 s WN, 10 s rest, and 5 Japanese digits.In the hearing task of the LS procedure, the participants were instructed to hear WN and 5 syllables.In the retaining task, they were instructed to retain 5 syllables for 5 s and then recall the syllables.The DS procedures were the same.Relative changes in oxyhemoglobin (OXY-Hb) during the DS and LS tests were measured using the FOIRE-3000 near-infrared brain imaging system (Shimadzu Corporation, Kyoto, Japan).We compared relative changes in OXY-Hb between retention and rest after hearing WN.Results: During the retention performance of the DS tests, the lt.AG activities were significantly observed.During the retention performance of the LS tests, the lt.postcentral gyrus and the lt.SMG activities were significantly observed.Conclusions: The most relevant regions for DS were found to be the same for normal persons and aphasia patients.However, the most relevant regions for LS were not the same.We considered that there are several phonological storages for each property. 安崎 文子 山本 佐代子 井上 正雄 Letter span と Digit span の神経基盤に関する検討--functional Near-
Language: Japanese
Subfield: Experimental and Cognitive Psychology
Field: Psychology
Domain: Social Sciences
Open Access status: green
OpenAlex ID: W212931542