Idioma:

Differential contributions of the superior and inferior parietal cortex to feedback versus feedforward control of tools

Macuga, Kristen L. ; Frey, Scott H.

NeuroImage (Orlando, Fla.), 2014-05, Vol.92, p.36-45 [Periódico revisado por pares]

Amsterdam: Elsevier Inc

Texto completo disponível

Citações Citado por

Enviar para

Título:
Differential contributions of the superior and inferior parietal cortex to feedback versus feedforward control of tools
Autor: Macuga, Kristen L. ; Frey, Scott H.
Assuntos: Adult ; Behavior ; Biological and medical sciences ; Brain Mapping ; Cerebellum ; Emulation ; Feedback, Physiological - physiology ; Female ; Fundamental and applied biological sciences. Psychology ; Hand - physiology ; Humans ; Imagination - physiology ; Lasers ; Male ; Motor ability ; Motor imagery ; Movement - physiology ; Nerve Net - physiology ; Parietal Lobe - physiology ; Perceptions ; Posterior parietal cortex ; Psychomotor Performance - physiology ; Sensorimotor control ; Tool use ; Vertebrates: nervous system and sense organs ; Visually guided movement ; Young Adult
É parte de: NeuroImage (Orlando, Fla.), 2014-05, Vol.92, p.36-45
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-News-1
ObjectType-Feature-3
content type line 23
ObjectType-Feature-1
Descrição: Damage to the superior and/or inferior parietal lobules (SPL, IPL) (Sirigu et al., 1996) or cerebellum (Grealy and Lee, 2011) can selectively disrupt motor imagery, motivating the hypothesis that these regions participate in predictive (i.e., feedforward) control. If so, then the SPL, IPL, and cerebellum should show greater activity as the demands on feedforward control increase from visually-guided execution (closed-loop) to execution without visual feedback (open-loop) to motor imagery. Using fMRI and a Fitts' reciprocal aiming task with tools directed at targets in far space, we found that the SPL and cerebellum exhibited greater activity during closed-loop control. Conversely, open-loop and imagery conditions were associated with increased activity within the IPL and prefrontal areas. These results are consistent with a superior-to-inferior gradient in the representation of feedback-to-feedforward control within the posterior parietal cortex. Additionally, the anterior SPL displayed greater activity when aiming movements were performed with a stick vs. laser pointer. This may suggest that it is involved in the remapping of far into near (reachable) space (Maravita and Iriki, 2004), or in distalization of the end-effector from hand to stick (Arbib et al., 2009). [Display omitted] •Closed-loop, open-loop, and imagined tool-use, in far space, obey Fitts' law.•Reduced influence of reciprocal aiming task difficulty during motor imagery•Superior-to-inferior gradient of feedback-to-feedforward control within the PPC•Mechanisms involved in motor imagery and open-loop control overlap substantially.•Anterior SPL supports dynamic representations of reachable as opposed to near space.
Editor: Amsterdam: Elsevier Inc
Idioma: Inglês

Links

Voltar para lista de resultados

Anterior Resultado 2 Avançar Ir para próxima página

Realização: Logos de Redes Sociais:

Differential contributions of the superior and inferior parietal cortex to feedback versus feedforward control of tools

Macuga, Kristen L. ; Frey, Scott H.

Amsterdam: Elsevier Inc

Buscando em bases de dados remotas. Favor aguardar.