The Brain Stem (Medulla Oblongata)

Medulla oblongata cranial nerves

Vestibulocochlear,Glossopharyngeal, Vagus, Accessory nerves, & Hypoglossal.

Crossing

Called the decussation of pyramids & explains why each side of the brain controls voluntary movements on the opposite side of the body

Medulla oblongata location

Cardio vascular center and the medullary rhythmicity center

Medulla oblongata

Continuous with the superior aspect of the spinal cord & contains both motor & sensory tracts

Medulla Oblongata functions

Heart rate, respiratory rate, vasoconstriction, swallowing, coughing, vomiting, sneezing, hiccupping

Brain stem parts

Medulla oblongata, Pons, & Midbrain

Vagus nerve

Nuclei in the medulla receive sensory impulses from and provide motor impulses to the pharynx and larynx and many thoracic and abdominal viscera via the _____

Glossopharyngeal nerve

Nuclei in the medulla sensory / motor impulses related to taste, swallowing, and salivation via the _____ _____

Hypoglossal nerve

Origin for nerve impulses that control tongue movements during speech and swallowing via the _______ _____

Decussation of pyramids

Part of the Medulla Oblongata where nerve tracks cross over

Pyramids

Part of the medulla oblongata & contain descending motor tracts

Inferior olivary nuclei

Receives input from cerebral cortex, red nucleus of the midbrain, and spinal cord

Vestibulocochlear nerve

Sensory input / provide motor output to cochlea of the internal ear via the ___ ____

Accessory nerves

These fibers are actually part of the vagus (X) nerves. control swallowing via the vagus nerves (cranial portion of the _______ _______)