Intra- and interhemispheric projections of the precentral, premotor and arcuate areas in the rhesus monkey*
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Sex comparisons of the bilateral deficit in proximal and distal upper body limb muscles
2019, Human Movement ScienceCitation Excerpt :Anatomically, transcallosal fibers connect both hemispheres through the corpus callosum in primates. In addition, the number of transcallosal projections that link proximal muscle representations in the primary somatosensory cortex (S1) and primary motor cortex (M1) areas is larger than those of the distal muscles (Gould, Cusick, Pons, & Kaas, 1986; Pandya & Vignolo, 1971; Rouiller et al., 1994). Thus, the number of corticospinal projections is greater in distal compared to more proximal muscles (Kuypers, 1978; Palmer & Ashby, 1992).
Motor output, neural states and auditory perception
2019, Neuroscience and Biobehavioral ReviewsDistant heterotopic callosal connections to premotor cortex in non-human primates
2017, NeuroscienceCitation Excerpt :In non-human primates, the majority of brain connectivity data (see datasets established based on the work of Paxinos et al., 2000; Van Essen, 2002; Dubach and Bowden, 2009; Rohlfing et al., 2012; Markov et al., 2014; Calebrese et al., 2015) originate from one hemisphere based on the assumption (though unproven) that lateralization does not play a key role in macaques’. The few available studies (e.g. Pandya and Vignolo, 1971) state that callosal connections predominantly link homotopic cortical regions. This view has been questioned in the past decade (Clarke, 2003) and new evidence of numerous and widespread heterotopic callosal connections have emerged in human studies.
Cytoarchitecture and cortical connections of the anterior insula and adjacent frontal motor fields in the rhesus monkey
2015, Brain Research BulletinCitation Excerpt :Like the ventral premotor areas and area ProM, the ventral area 4 receives projections from the rostral part of MII, and from the rostral portion of areas M3 and M4 (orofacial representations). Overall, this projection pattern is in agreement with previous studies which have examined the cortical connections of the ventral precentral orofacial region (e.g., Pandya and Vignolo, 1971; Godschalk et al., 1984; Morecraft et al., 1996; Tokuno et al., 1997) Thus, it seems that, like the dorsal motor proiso- and isocortical areas (Morecraft et al., 2012), the ventral motor proiso- and isocortical areas (area ProM and the ventral portion of area 6) have widespread connections with the prefrontal and parietal cortices as well as with the ventral portions of areas 3, 4, and the rostral portions of MII and the two cingulate motor areas (Fig. 15).
cTBS delivered to the left somatosensory cortex changes its functional connectivity during rest
2015, NeuroImageCitation Excerpt :Outside the shared circuits, sICA showed that cTBS over the SI reduced the degree to which a number of brain regions participate in the four ICs we explored, including in particular a number of brain regions known to be strongly associated with the SI during the planning, execution and observation of motor actions (basal ganglia, cerebellum, BA6 (Rizzolatti et al., 1996)), the processing of tactile stimuli and the observation of touch in others (SII in the parietal operculum, (Keysers et al., 2004)) and the experience and observation of nociceptive stimuli (anterior cingulate, amygdala, (Duerden and Albanese, 2013; Lamm et al., 2011)). Importantly, this network includes regions known to have direct or indirect connections with the region of the SI we have targeted (Jones, 1986; Pandya and Vignolo, 1971; Shanks et al., 1985; Wise et al., 1997). We must stress that not having a functional measurement of the effectiveness of our stimulation limits our conclusions.
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A preliminary report of the present findings has been published elsewhere21.
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Present address: Clinica delle Malattie Nervose e Mentali, Università degli Studi di Trieste, 34129 Trieste, Italy.