Medulla Oblongata

travel_bug
Mind Map by , created almost 6 years ago

Nervous System (Brain) Mind Map on Medulla Oblongata, created by travel_bug on 10/20/2013.

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travel_bug
Created by travel_bug almost 6 years ago
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Medulla Oblongata
1 Inferior part of brain stem
1.1 Begins at foramen magnum, extends to pons (about 3cm)
2 Pyramids are protrusions formed by large corticospinal tracts that pass from cerebrum to spinal cord.
2.1 Just superior to the junction of medulla with spinal cord, 90% of axons in left pyramid cross to the right side and vice versa. This is called decussation of pyramids.
3 Nuclei in the medulla control & regulate the cardiovascular center & medullary rhythmicity area.
3.1 Cardiovascular regulates rate & force of heart beat & diameter of blood vessels
3.2 Rhythmicity area of the respiratory center adjusts the basic rhythm of breathing
4 Controls reflexes for vomiting, swallowing, sneezing, coughing and hiccupping.
5 Olive = olivary nucleus
5.1 neurons send input to cerebellum
5.1.1 proprioceptive signals
5.1.1.1 gives precision to movements
6 5 cranial nerves arise from medulla - 8 thru 12

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