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Unformatted text preview: posterior spinocerebellar subconscious proprioception anterior spinocerebellar DESCENDING TRACTS (MOTOR) lateral corticospinal motor output from cortex to anterior corticospinal motor cells of ant. horn rubrospinal motor from midbrain to ant. horn for precise movement tectospinal motor from midbrain to ant. horn; movements in response to audiovisual/cutaneous stimuli vestibulospinal motor from medulla to ant. horn; coordination/balance lateral reticulospinal motor from medulla to ant. horn; inhibit ext. reflexes medial reticulospinal motor from pons to ant. horn; facilitate ext. reflexes * NOTE: These descending tracts terminate on the motor cells of the ANTERIOR GREY HORN. It is here that the cell bodies of the motor neurons to the skeletal muscles reside. The efferent skeletal motor fibers (axons) originate in the ANTERIOR HORN !!!!!!!!!! These motor fibers get to the muscles via the 31 pairs of spinal nerves. This is how all motion is controlled....
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- Fall '10