Elsevier

Brain Research

Volume 43, Issue 1, 11 August 1972, Pages 276-279
Brain Research

Origin of modulation in neurones of the ventral spinocerebellar tract during locomotion

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    Lundberg postulated that VSCTs relay information about the activity of spinal networks to the cerebellum (Lundberg, 1971). This hypothesis gained traction from experiments in adult cats demonstrating that the activity of VSCTs is rhythmically modulated during locomotion after deafferentation (Arshavsky et al., 1972). To test whether VSCTs are rhythmically active during locomotor behavior, we induced locomotor-like activity utilizing the intact ex vivo mouse spinal cord (from T4 to cauda equina) as previously reported (Bonnot et al., 2002; Jiang et al., 1999).

  • Corollary Discharge Signals in the Cerebellum

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    A number of major candidates convey motor information tuned to multiple effectors and derive from sources across the brain, including cerebral cortex, via relay in the basilar pontine nuclei (13–16). Other major brainstem sources of motor information are the lateral reticular nucleus (17–21), conveying information on cervical and limb musculature; the nucleus hypoglossis prepositus and nucleus reticularis tegmenti pontis, both encoding parameters of oculomotor control (22–24); the magnocellular red nucleus (25–27), involved in limb and facial movement; the cerebellar nuclei (12,28–30), mediating control of diverse effectors; and the ventral/rostral spinocerebellar tract (31–36), reporting activity of spinal motor neurons. Each of these putative sources of motor information could contribute to Purkinje neuron signaling, most clearly in analogous motor domains as the motor CD.

  • Action-perception coupling in kinesthesia: A new approach

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    Otherwise, the awareness of either type of motor action may be generated at a brain site where central and afferent kinesthetic information converge. The notion that somatosensory feedback conveys information about deviation of the actual position of body segments from centrally specified referent position might be applicable to ascending somatosensory pathways as well as to neurons of dorsal and ventral spinocerebellar tracts and propriospinal neurons having recurrent projections to the cerebellum (Arshavsky, Berkinblit, Fukson, Gelfand & Orlovsky, 1972; Arshavsky, Gelfand, Pavlova & Orlovsky, 1978; Alstermark, Isa, Pettersson, & Sasaki, 2007). According to the PS rule, this would be helpful in continuously monitoring changes in the actual position of body segments to decide whether it is necessary to correct the ongoing or switch to another pattern of referent shift in response to destabilizing external perturbations, environmental events or internal intentions.

  • The spinobulbar system in lamprey

    2008, Brain Research Reviews
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    The DSCT appears to be specialized for conveying sensory information (Arshavsky et al., 1972a; Bosco and Poppele, 2001). The VSCT and SRCP convey information regarding the activity of the spinal interneurons involved in generating motor patterns (Lundberg, 1971; Arshavsky et al., 1972b, 1978a,b) although they also receive some sensory inputs (Lundberg and Weight, 1971). This rhythmic feedback signal regarding the state of the locomotor networks is important for ensuring that descending control signals for various motor programs occur with the proper timing during the locomotor rhythm.

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