When kai sticks his tongue out like his brother, he is using the corticobulbar tract to control these movements.
The corticobulbar tract supplies top motor neuron innervation to the cranial nerves providing the head and face. The precentral gyrus in the posterior part of the frontal lobe of the cerebrum is the part of the number one motor cortex from wherein numerous motor pathways originate.
The corticobulbar tract conducts impulses from the brain to the cranial nerves. these nerves manipulate the muscle tissues of the face and neck and are involved in facial features, mastication, swallowing, and other motor functions. The corticospinal tract conducts impulses from the brain to the spinal cord.
The corticobulbar tract originates within the number one motor cortex of the frontal lobe, simply superior to the lateral fissure and rostral to the critical sulcus inside the precentral gyrus (Brodmann area 4).
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