Functional comparison of primacy, middle and recency retrieval in human auditory short-term memory: an event-related fMRI study.
Primacy and recency effects refer to the better performance or shorter response time on the first and last items than the middle ones of a memory list. In order to investigate its neural basis in auditory short-term memory, event-related fMRI was used to measure brain activities when subject was recalling the first, the last, or the middle items. Recalling the middle item was associated with more extensive activation in the left parietal and visual cortex, basal ganglia, and dorsal cerebellum. Recalling items from different serial positions also resulted in different activation time courses in the bilateral primary auditory cortex, left prefrontal cortex and left premotor cortex. These data indicate that the auditory cortex may serve as a transient storage or the auditory input buffer, which seems to play an important role in the primacy and recency effects.
Zhang
Da Ren
DR
Department of Neurobiology and Biophysics, University of Science and Technology of China, HeFei 230027, PR China. xhu@emory.edu
Li
Zhi Hao
ZH
Chen
Xiang Chuan
XC
Wang
Zhao Xin
ZX
Zhang
Xiao Chu
XC
Meng
Xiao Mei
XM
He
Sheng
S
Hu
Xiao Ping
XP
D000161:Acoustic Stimulation; D000328:Adult; D001307:Auditory Perception / Q000502:physiology; D001479:Basal Ganglia / Q000502:physiology; D001931:Brain Mapping; D002531:Cerebellum / Q000502:physiology; D002540:Cerebral Cortex / Q000033:anatomy & histology / Q000502:physiology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D008297:Male; D008570:Memory, Short-Term / Q000502:physiology*; D011939:Mental Recall / Q000502:physiology*; D011897:Random Allocation; D011930:Reaction Time / Q000502:physiology; D012691:Serial Learning; D014706:Verbal Learning / Q000502:physiology