title: Dissociation between Conceptual and Perceptual Implicit Memory: Evidence from Patients with Frontal and Occipital Lobe Lesions.
abstract: The latest neuroimaging studies about implicit memory (IM) have revealed that different IM types may be processed by different parts of the brain. However, studies have rarely examined what subtypes of IM processes are affected in patients with various brain injuries. Twenty patients with frontal lobe injury, 25 patients with occipital lobe injury, and 29 healthy controls (HC) were recruited for the study. Two subtypes of IM were investigated by using structurally parallel perceptual (picture identification task) and conceptual (category exemplar generation task) IM tests in the three groups, as well as explicit memory (EM) tests. The results indicated that the priming of conceptual IM and EM tasks in patients with frontal lobe injury was poorer than that observed in HC, while perceptual IM was identical between the two groups. By contrast, the priming of perceptual IM in patients with occipital lobe injury was poorer than that in HC, whereas the priming of conceptual IM and EM was similar to that in HC. This double dissociation between perceptual and conceptual IM across the brain areas implies that occipital lobes may participate in perceptual IM, while frontal lobes may be involved in processing conceptual memory.
authors.affiliation: Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast University, Nanjing, China; Department of Neurology, People's Hospital of YuXi City, The Sixth Affiliated Hospital of Kunming Medical University, Yuxi, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Gong
authors.affiliation: Department of Neurology, People's Hospital of YuXi City, The Sixth Affiliated Hospital of Kunming Medical University , Yuxi , China.
authors.forename: JiHua
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Neurology, People's Hospital of YuXi City, The Sixth Affiliated Hospital of Kunming Medical University , Yuxi , China.
authors.forename: XuDong
authors.initials: X
authors.lastname: Yang
authors.affiliation: Department of Neurology, People's Hospital of YuXi City, The Sixth Affiliated Hospital of Kunming Medical University , Yuxi , China.
authors.forename: Lei
authors.initials: L
authors.lastname: Feng
authors.affiliation: Department of Neurology, People's Hospital of YuXi City, The Sixth Affiliated Hospital of Kunming Medical University , Yuxi , China.
authors.forename: Xiu
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Neurology, People's Hospital of YuXi City, The Sixth Affiliated Hospital of Kunming Medical University , Yuxi , China.
authors.forename: Cui
authors.initials: C
authors.lastname: Gu
authors.affiliation: Department of Neurology, People's Hospital of YuXi City, The Sixth Affiliated Hospital of Kunming Medical University , Yuxi , China.
authors.forename: MeiHong
authors.initials: M
authors.lastname: Wang
authors.affiliation: Department of Neurology, People's Hospital of YuXi City, The Sixth Affiliated Hospital of Kunming Medical University , Yuxi , China.
authors.forename: JiaYun
authors.initials: J
authors.lastname: Hu
authors.affiliation: The Second Affiliated Hospital of Anhui Medical University , Hefei , China.
authors.forename: Huaidong
authors.initials: H
authors.lastname: Cheng
keywords: brain injury; explicit memory; frontal lobes; implicit memory; occipital lobes; priming