Topic: Skilled Movement

Precise motor control relies on appropriate connections between subcerebral projection neurons (SCPN) in cerebral cortex and targets in brainstem and spinal cord. While cortical innervation of the spinal cord is crucial for skilled movement, input into the brainstem additionally fine-tunes movement and motor planning. The brainstem receives cortical input either through: 1) cortico-brainstem neurons (CBN) innervate brainstem directly without reaching into the spinal cord, 2) corticospinal neurons (CSN) project to the spinal cord while also branching in brainstem. Distinguishing between these t

Spasticity, characterized by increased spinal stretch reflexes, appears after a certain period following stroke and it is impaired sever skilled movement by spasticity. The mechanism in the cerebral neuronal circuitry is still largely unknown. This present study focused changing of neuronal activity on the ventral medullary reticular nucleus (MdV), which has been recognized as the region associated with skilled movement. Quantitative activation-induced manganese-enhanced MRI is noninvasive measurement of the history of neuronal activity. Manganese ions (Mn2+) enter and accumulate in active neu