Origin:Midbrain-fibers cross
Termination:anterior gray horn Function:movements of head in response to auditory, visual, and cutaneous stimuli
Tectospinal
Origin:medulla- no crossing
Termination:anterior gray horn
Function:body tone in response to head movements for maintaining equilibrium
Vestibulospinal
Origin: medulla-no crossing
Termination:anterior gray horn
Function:inhibit extensor reflexes and muscle tone in axial skeleton and prozimal limb muscles
Lateral reticulospinal
Origin:Pons- no crossing Termination:anterior gray horn Function:facilitate extensor reflexes and muscle tone in axial skeleton and proximal limb muscles