Retrograde Axonal Transport of Fluorescent Tracers from Medullary Reticular Structures to the “Neck” and “Forelimb” Segments of the Cervical Spinal Cord
Retrograde Axonal Transport of Fluorescent Tracers from Medullary Reticular Structures to the “Neck” and “Forelimb” Segments of the Cervical Spinal Cord
Cervical spinoreticular (CSR) neurons and the linked medullary reticular neurons respond to proprioceptive afferent volleys stemming not only from the forelimb but also from the dorsal neck musculature. These neurons may also respond to vestibular afferent volleys stemming from macular labyrinthine receptors. The potential that CSR neurons are involved in the proprioceptive cervical and labyrinthine control of posture is supported by anatomic observations, manifesting that both uncrossed as well as crossed CSR neurons terminate in the precerebellar lateral reticular nucleus (LRN), which inhibits the discharge of excitatory vestibulospinal (VS) neurons by acting through Purkinje cells of the cerebellar hermivervis. Physiologic researches have shown that populations of both MRF and LRN neurons respond to neck and macular labyrinthine stimulations.
Keywords: cervical spinoreticular neurons, posture, neurons, excitatory vestibulospinal neurons, Purkinje cells, anatomic observations
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