Journal Article

PreJuSER-55616

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The effect of switching between sequential and repetitve movements on cortical activation

Jäncke, R. K. ; Himmelbach, M. ; Shah, J. N.FZJ* ; Zilles, K.FZJ*

2000
Academic Press Orlando, Fla.

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/3823  doi:10.1006/nimg.2000.0626

Abstract: We used whole-head functional magnetic resonance imaging (fMRI) to investigate the effect of switching between different sequential and repetitive movements in the context of conditional and fixed tasks. Four different movement tasks were applied: (1) unpredictable switching between two movement sequences comprising six submovements each according to visual cues (SEQ-VC); (2) unpredictable switching between repetitive movement of one finger according to visual cues (REP-VC); (3) performance of the same sequential movements used for SEQ-VC but in a fixed mode triggered by a visual stimulus (SEQ-FIX); (4) performance of the repetitive movements used for REP-FIX but in a fixed mode by a visual stimulus (REP-FIX). The statistical group analysis of the hemodynamic responses revealed the following results: (1) the SEQ-VC compared to the SEQ-FIX condition (switching between movement sequences) engendered stronger activations in the left rostral supplementary motor area (pre-SMA), bilaterally in the posterior parietal lobule, the left ventral premotor area, and the visual cortices; (2) the REP-VC compared to the REP-FIX condition (switching between repetitive movements) only revealed stronger activation in extra-striate areas. We hypothesize that during switching of movement sequences higher motor control aspects are involved including movement selection, updating of motor plans, as well as recalling and restoring motor plans. The repetitive movements are too simple in order to evoke additional activations in the medial and lateral premotor areas, as well as in parietal areas.

Keyword(s): premotor cortex ; SMA ; fMRI ; hand movement ; motor program ; motor control ; movement sequences ; pre-SMA

Note: Record converted from VDB: 12.11.2012; Record converted from JUWEL: 18.07.2013

---

Contributing Institute(s):

1. Institut für Medizin (IME)

Research Program(s):

1. Zerebrale Repräsentation (40.40.0)

Appears in the scientific report 2000

---

Database coverage:
;

---