Changes

The Medulla Oblongata can be found within the Myelencephalon region of the hind-brain. Nuclei in the Medulla Oblongata control the level of heart activity including rate and contractility. The Medulla Oblongata also controls other related functions including blood pressure and distribution of blood to different organs. In conjunction with the nuclei found in the Pons, the Medulla Oblongata also exerts an influence on respiratory movements. The respiratory centre in the Medulla Oblongata is affected by various types of drugs including opiods such as Morphine. These types of drugs often suppress the activity of the neurones in the respiratory nuclei.

The Medulla Oblongata can be found within the Myelencephalon region of the hind-brain. Nuclei in the Medulla Oblongata control the level of heart activity including rate and contractility. The Medulla Oblongata also controls other related functions including blood pressure and distribution of blood to different organs. In conjunction with the nuclei found in the Pons, the Medulla Oblongata also exerts an influence on respiratory movements. The respiratory centre in the Medulla Oblongata is affected by various types of drugs including opiods such as Morphine. These types of drugs often suppress the activity of the neurones in the respiratory nuclei.

===Pons===

===Pons===

The Pons can be found in the Metencephalon region of the hind brain. As shown above, the Pons is able to exert some influence on respiratory movements and in some studies has also been shown to influence many digestive processes.

The Pons can be found in the Metencephalon region of the hind brain. As shown above, the Pons is able to exert some influence on respiratory movements and can also influence many digestive processes.

 

===Cranial Nerves===

===Cranial Nerves===

Cranial nerves III to XII exit from the brain stem and act to innervate parts of the head, neck, viscera and the thoracic and abdominal cavities. Although most of these nerves contain both sensory and motor fibres, the sensory fibres all have their cell bodies in ganglia outside the brain stem.  

Cranial nerves III to XII exit from the brain stem and act to innervate parts of the head, neck, viscera and the thoracic and abdominal cavities. Although most of these nerves contain both sensory and motor fibres, the sensory fibres all have their cell bodies in ganglia outside the brain stem.