Brain activation profiles during kinesthetic and visual imagery: An fMRI study

Kilintari, Marina; Narayana, Shalini; Babajani‐Feremi, Abbas; Rezaie, Roozbeh; Papanicolaou, Andrew C.

doi:10.1016/j.brainres.2016.06.009

Cited by 56 publications

(48 citation statements)

References 110 publications

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“…This latter observation is somewhat in contrast to earlier work. However, while it was long hypothesized that action execution, imagery, and observation were functionally equivalent, a very recent study investigating visual and kinesthetic motor imagination failed to demonstrate activation of the primary motor cortex, 30 similar to pain imagination and pain memory failing to activate the primary sensory cortices in our study. What remains to be determined in subsequent work is whether previous and current observations in healthy volunteers translate to a chronic pain setting where specific pain memories likely alter patients’ behavior(s).…”

Section: Discussionsupporting

confidence: 45%

Detection of central circuits implicated in the formation of novel pain memories

Upadhyay¹,

Granitzka²,

Bauermann³

et al. 2016

JPR

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Being able to remember physically and emotionally painful events in one’s own past may shape behavior, and can create an aversion to a variety of situations. Pain imagination is a related process that may include recall of past experiences, in addition to production of sensory and emotional percepts without external stimuli. This study aimed to understand 1) the central nervous system processes that underlie pain imagination, 2) the retrieval of pain memories, and 3) to compare the latter with visual object memory. These goals were achieved by longitudinally investigating brain function with functional magnetic resonance imaging in a unique group of healthy volunteers who had never experienced tooth pain. In these subjects, we compared brain responses elicited during three experimental conditions in the following order: imagination of tooth pain (pain imagination), remembering one’s own house (object memory), and remembrance of tooth pain following an episode of induced acute tooth pain (pain memory). Key observations stemming from group-level conjunction analyses revealed common activation in the posterior parietal cortex for both pain imagination and pain memory, while object and pain memory each had strong activation predominantly within the middle frontal gyrus. When contrasting pain imagination and memory, significant activation differences were observed in subcortical structures (ie, parahippocampus − pain imagination > pain memory; midbrain − pain memory > pain imagination). Importantly, these findings were observed in the presence of consistent and reproducible psychophysical and behavioral measures that informed on the subjects’ ability to imagine novel and familiar thoughts, as well as the subjects’ pain perception.

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Section: Discussionsupporting

confidence: 45%

Detection of central circuits implicated in the formation of novel pain memories

Upadhyay¹,

Granitzka²,

Bauermann³

et al. 2016

JPR

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“…; Kilintari et al . ). The generation of a subliminal cortical output during MI has also been suggested to impact subcortical structures (Bonnet et al .…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, it is now well established that brain areas devoted to motor control and execution, e.g. supplementary motor area (SMA), premotor and primary motor cortices, cerebellum, and parietal cortex, are also activated during MI (Decety et al 1994;Lotze et al 1999;Grèzes & Decety, 2001;Ehrsson et al 2003;Guillot et al 2009;Munzert et al 2009;Kilintari et al 2016). The generation of a subliminal cortical output during MI has also been suggested to impact subcortical structures (Bonnet et al 1997;Hale et al 2003;Cowley et al 2008;Aoyama & Kaneko, 2011;Grosprêtre et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Spinal plasticity with motor imagery practice

Grosprêtre

Lebon

Papaxanthis

et al. 2018

The Journal of Physiology

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Key points While a consensus has now been reached on the effect of motor imagery (MI) – the mental simulation of an action – on motor cortical areas, less is known about its impact on spinal structures. The current study, using H‐reflex conditioning paradigms, examined the effect of a 20 min MI practice on several spinal mechanisms of the plantar flexor muscles. We observed modulations of spinal presynaptic circuitry while imagining, which was even more pronounced following an acute session of MI practice. We suggested that the small cortical output generated during MI may reach specific spinal circuits and that repeating MI may increase the sensitivity of the spinal cord to its effects. The short‐term plasticity induced by MI practice may include spinal network modulation in addition to cortical reorganization. Abstract Kinesthetic motor imagery (MI) is the mental simulation of a movement with its sensory consequences but without its concomitant execution. While the effect of MI practice on cortical areas is well known, its influence on spinal circuitry remains unclear. Here, we assessed plastic changes in spinal structures following an acute MI practice. Thirteen young healthy participants accomplished two experimental sessions: a 20 min MI training consisting of four blocks of 25 imagined maximal isometric plantar flexions, and a 20 min rest (control session). The level of spinal presynaptic inhibition was assessed by conditioning the triceps surae spinal H‐reflex with two methods: (i) the stimulation of the common peroneal nerve that induced D1 presynaptic inhibition (HPSI response), and (ii) the stimulation of the femoral nerve that induced heteronymous Ia facilitation (HFAC response). We then compared the effects of MI on unconditioned (HTEST) and conditioned (HPSI and HFAC) responses before, immediately after and 10 min after the 20 min session. After resting for 20 min, no changes were observed on the recorded parameters. After MI practice, the amplitude of rest HTEST was unchanged, while HPSI and HFAC significantly increased, showing a reduction of presynaptic inhibition with no impact on the afferent‐motoneuronal synapse. The current results revealed the acute effect of MI practice on baseline spinal presynaptic inhibition, increasing the sensitivity of the spinal circuitry to MI. These findings will help in understanding the mechanisms of neural plasticity following chronic practice.

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“…That is, the two cognitive activities share the same neurophysiological bases, and imagery is an actual physical simulation of perceptual and motor experience [7][8][9] . Evidence of shared mechanisms has been provided mainly by neuroimaging studies which have shown partially similar brain activations during action or perception of all sensory modalities and the correspondent mental images 2,3,[10][11][12][13][14][15][16][17][18][19][20] . Indeed, spatial overlap between activations provides insights into which regions perform similar roles during mental images and perception.…”

mentioning

confidence: 99%

Topology highlights mesoscopic functional equivalence between imagery and perception

Ibáñez‐Marcelo

Campioni

Phinyomark

et al. 2018

Preprint

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The functional equivalence between mental images and perception or motion has been proposed on the basis of neuroimaging evidence of large spatially overlapping activations between real and imagined sensori-motor conditions. However, similar local activation patterns do not imply the same mesoscopic integration of brain regions active during imagery and perception or action. Here we present the first EEG evidence of topological equivalence between functional network organization at intermediate and global scales during tasks. We show that the degree of functional equivalence varies in the population and is associated with different magnitudes in the restructuring of the functional connectivity between imagery and real tasks. In particular, changes observed during imagery with respect to basal conditions account for the cognitive effort experienced during imagery, and subjects characterized by stronger functional equivalence exhibit smaller topological deviations in the imagination tasks performed after real tasks, thus showing learning effects. Altogether, our findings point to different sensori-cognitive information processing in the subjects showing different functional equivalence. We anticipate our results to be a starting point for a novel dynamical description of functional equivalence, which will be relevant for socio-cognitive theories of embodiment and cognitive formulations of how different selves emerge from neurophysiological assets.

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Brain activation profiles during kinesthetic and visual imagery: An fMRI study

Cited by 56 publications

References 110 publications

Detection of central circuits implicated in the formation of novel pain memories

Detection of central circuits implicated in the formation of novel pain memories

Spinal plasticity with motor imagery practice

Topology highlights mesoscopic functional equivalence between imagery and perception

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