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Reticulospinal 1st neuron: sup colliculus Bilateral postural & gross limb mvmnt muscs; responds to visual & auditory stim; anticipatory post adjustments & reaching; stepping pattern generators
Medial vestibulospinal 1st neuron: medial vestibular nucleus of pons Receives bilat head & neck movement & position info from vestibular organs & uses this info to control posture
Lateral vestibulospinal 1st neuron: lat vestibular nuc of pons (ipsilateral) Responds to gravity info; facilitates LMN's to extensors & inhibits LMN's to flexors in order to control LE posture
medial corticospinal 1st neuron: cerebral motor cortex Controls neck, shoulder, & trunk postural muscles
lateral corticospinal contralateral control of muscs for fine, distal, fractionated movements; crosses at pyramidal decussation to separate from medial cs; controls voluntary movements
rubrospinal contralateral control of UE flexors; crosses midline ant to tegmental decussation
corticolbulbar/corticobrainstem 1st neuron(s): motor cortex & frontal eye fields; project from CN nuclei in brainstem to face & muscs of face
non-specific UMN "Emotional Motor System: ceruleospinal tract (arousal, attention, memory, emotions, behavior, postural control, etc...) & raphespinal tract (acts to inhibit pain in sc)
afferent visceral receptors from mouth CN VII & IX; solitary nucleus in medulla
afferent receptors from throat & gut CN X; solitary nucleus
afferent stretch receptors in bld vessels info from periph nerves to SC- autonomic reflex w/ autonomic efferents
afferent stretch receptors in GI tract passes through autonomic ganglia, but does not synapse here; autonomic reflexes w/ autonomic efferents in SC
Created by: MeganFultz2