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 _______ _______)