Relation between palm and finger cortical representations in primary somatosensory cortex: A 7T fMRI study.

ABSTRACT: Many studies focused on the cortical representations of fingers, while the palm is relatively neglected despite its importance for hand function. Here, we investigated palm representation (PR) and its relationship with finger representations (FRs) in primary somatosensory cortex (S1). Few studies in humans suggested that PR is located medially with respect to FRs in S1, yet to date, no study directly quantified the somatotopic organization of PR and the five FRs. Importantly, the link between the somatotopic organization of PR and FRs and their activation properties remains largely unexplored. Using 7T fMRI, we mapped PR and the five FRs at the single subject level. First, we analyzed the cortical distance between PR and FRs to determine their somatotopic organization. Results show that PR

SUBMITTER: Akselrod M 

PROVIDER: S-EPMC8046155 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature