Nuclei Of Spinal Cord T1

Vestibular System: Vestibulospinal Tracts

Excitatory endings —! Inhibitory endings

Ascending fibers in medial longitudinal fasciculi -

Superior Medial Lateral Inferior

Motor neuron (controlling neck muscles) -

Medial vestibulospinal fibers in medial longitudinal fasciculi

Ventral

* To cerebellum

Vestibular ganglion and

Superior Medial Lateral Inferior

Ventral

* To cerebellum

Motor neuron (controlling neck muscles) -

Medial vestibulospinal fibers in medial longitudinal fasciculi

Excitatory endings to back muscles

Lower part of cervical spinal cord

Spinal Vestibular Nucleus

Vestibular nuclei

Rostral

Upper limb

Somatotopical pattern in lateral vestibular nucleus

Fibers from cristae (rotational stimuli)

Fibers from maculae (gravitational stimuli)

To flexor muscles To extensor muscles

Inhibitory ending

Inhibitory ending

To axial muscles

Excitatory ending Lateral vestibulospinal tract

Vestibular nuclei

Rostral

Upper limb

Trunk

Dorsal

Lower limb

Caudal

Trunk

Dorsal

Lower limb

Caudal

Somatotopical pattern in lateral vestibular nucleus

Vestibular ganglion and

Fibers from cristae (rotational stimuli)

Excitatory endings to back muscles

Lower part of cervical spinal cord

Fibers from maculae (gravitational stimuli)

To flexor muscles To extensor muscles

To axial muscles

Lumbar part of spinal cord

Inhibitory ending

Inhibitory ending

To axial muscles

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