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Control involuntary actions like posture and balance. Vestibulospinal: Posture and balance. Rubrospinal: Voluntary movement of upper limbs. Reticulospinal: Regulation of muscle tone.
Medial portion, carries information from the lower limbs (below T6).
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Carries fine coordination info from the lower limbs; enters the cerebellum via the inferior cerebellar peduncle uncrossed.
The Dorsal Column-Medial Lemniscal Pathway (Functions, 3-neuron chain, diagrams).
Descending tracts originate in the brain and travel downward through the spinal cord to synapse with lower motor neurons (LMNs), which directly innervate skeletal muscles. These pathways are fundamentally split into pyramidal and extrapyramidal systems. The Pyramidal (Corticospinal) System Rubrospinal: Voluntary movement of upper limbs
Originates in the reticular formation (pontine and medullary); regulates muscle tone and automated movements like walking.
Q: What are the ascending tracts of the spinal cord? A: The ascending tracts of the spinal cord transmit sensory information from the body to the brain, including sensations of touch, pressure, temperature, pain, and proprioception.