Short communicationSomatotopic reciprocal connections between the somatosensory cortex and the thalamic Po nucleus in the rat
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Cited by (47)
Feedforward and feedback pathways of nociceptive and tactile processing in human somatosensory system: A study of dynamic causal modeling of fMRI data
2021, NeuroImageCitation Excerpt :Compared with the previous studies, one of the strengths of the present study is that the descending pathways from the S1 and S2 to the thalamus were also taken into account in the constructed DCMs, enabling the investigation of possible corticothalamic feedback regulations within this ‘thalamus-S1-S2’ network. Indeed, the existence of corticothalamic pathways have been reported in abundant anatomical studies in animals showing that both S1 and S2 send fibers to various thalamic nuclei especially the posterior nuclei of the thalamus (Auer, 1956; Chmielowska et al., 1989; Jones and Powell, 1968, 1970; Liao et al., 2010; Niimi et al., 1963; Nothias et al., 1988; Rinvik, 1968a, b; Spreafico et al., 1987; Stratford, 1954; Veinante et al., 2000). Anatomical evidence showed that corticothalamic projections are ~10 times more numerous than thalamocortical projections (Liu et al., 1995).
Rodent somatosensory thalamocortical circuitry: Neurons, synapses, and connectivity
2021, Neuroscience and Biobehavioral ReviewsCitation Excerpt :In general, the whole VB has a somatotopic arrangement (Emmers, 1965; Saporta and Kruger, 1977; Waite, 1973), with a primary somatotopic map containing unilateral representations and a secondary with bilateral projections (Emmers, 1965). POm has also been shown to be somatotopic (Fabri and Burton, 1991; Nothias et al., 1988; Ohno et al., 2012), with cortical driver projections from L5b innervating four distinctly oriented somatotopic maps in different subdivisions of this nucleus (Sumser et al., 2017). Early investigations have shown a clearer arrangement in VB than in Rt and POm (Hoogland et al., 1987).
Bidirectional brain-computer interfaces
2020, Handbook of Clinical NeurologyThalamocortical Abnormalities in Spinal Cord Injury Pain
2013, Chronic Pain and Brain AbnormalitiesSomatotopic direct projections from orofacial areas of primary somatosensory cortex to pons and medulla, especially to trigeminal sensory nuclear complex, in rats
2012, NeuroscienceCitation Excerpt :Further, the reciprocal connections between the S1 and the ventroposterior thalamic nuclei have been well documented (Diamond et al., 1969; Jones et al., 1979; Mayner and Kaas, 1986; Hoogland et al., 1987; Land et al., 1995; Deschênes et al., 1998). In the present study, BDA-labeled axon terminals from the five orofacial S1 areas were somatotopically distributed in the ventroposterior medial thalamic nucleus (data not shown), whose somatotopy seemed to correspond to that proposed in earlier studies (Saporta and Kruger, 1977; Nothias et al., 1988; Fabri and Burton, 1991b; Liao et al., 2010). Therefore, it is highly likely that the orofacial S1 areas produce feedback regulation of the ascending somatosensory information to themselves in the third order somatosensory neurons in the ventroposterior medial thalamic nucleus as well as in the second-order ones.