reticulospinal tract

Reticulospinal tracts: It serves as a connector for the corticospinal system by which cortical neurons can control motor function.

Commands that initiate locomotor circuits in the spinal cord are also transmitted through the medullary reticulospinal tract.

Thus, the reticulospinal tracts are involved in many aspects of motor control, including the integration of sensory input to guide motor output.

Inhibitory signals arrive at gamma neurons through the lateral reticulospinal tract from Brodmann area 6, the paleocerebellum and the red nucleus.

Facilitatory signals arrive through the ventral reticulospinal tract from Brodmann area 4, the neocerebellum and the vestibular nucleus.

The vestibulospinal tract, as well as tectospinal and reticulospinal tracts are examples of components of the medial pathway.

These are the rubrospinal tract, the vestibulospinal tract, the tectospinal tract and the reticulospinal tract.

The PRF descends the reticulospinal tract where it innervates motor neurons and spinal interneurons.

Somatic motor control - Some motor neurons send their axons to the reticular formation nuclei, giving rise to the reticulospinal tracts of the spinal cord.

The reticulospinal tracts also provide a pathway by which the hypothalamus can control sympathetic thoracolumbar outflow and parasympathetic sacral outflow.

Motor neuronal hyperactivity occurs due to loss of inhibition of cells of the anterior horn of the spinal cord resulting from reticulospinal tract damage.

Hyperextension occurs due to facilitation of the anterior reticulospinal tract caused by the inactivation of inhibitory corticoreticular fibers, which normally act upon the pons reticular formation.

The RVLM is the primary regulator of the sympathetic nervous system, sending excitatory fibers (catecholaminergic) to the sympathetic preganglionic neurons in the spinal cord, via reticulospinal tract.

The rubrospinal tract and medullary reticulospinal tract biased flexion outweighs the medial and lateral vestibulospinal and pontine reticulospinal tract biased extension in the upper extremities.

These convey an impulse to neurons in the medullary reticular formation which project down the reticulospinal tract and synapse with afferent neurons in the spinal cord (L1-L6) which contract muscles along the spine to exhibit the lordosis posture.

The descending rubrospinal tract and reticulospinal tract originate in the red nucleus and reticular formation (which is closely associated with the central tegmental tract) respectively, thereby providing the mechanism by which this circuit exerts its effects on spinal cord motor activity.

The reticulospinal tract (or anterior reticulospinal tract) is an extrapyramidal motor tract which descends from the reticular formation in two tracts to act on the motor neurons supplying the trunk and proximal limb muscles.