What is the structure of the medulla oblongata?

August 7, 2020 Off By idswater

What is the structure of the medulla oblongata?

The medulla is divided into two main parts: the ventral medulla (the frontal portion) and the dorsal medulla (the rear portion; also known as the tegmentum). The ventral medulla contains a pair of triangular structures called pyramids, within which lie the pyramidal tracts.

What are pyramids in the medulla?

The medullary pyramids are paired white matter structures of the brainstem’s medulla oblongata that contain motor fibers of the corticospinal and corticobulbartracts – known together as the pyramidal tracts. The lower limit of the pyramids is marked when the fibers cross (decussate).

What is PON anatomy?

The pons is a broad horseshoe-shaped mass of transverse nerve fibres that connect the medulla with the cerebellum. It is also the point of origin or termination for four of the cranial nerves that transfer sensory information and motor impulses to and from the facial region and the brain.

What is the size of medulla oblongata?

approximately 3 cm
The medulla is approximately 3 cm in length and 2 cm in greatest diameter 2. The caudal border of the medulla is the 1st cervical spinal nerves. The superior broad part of the medulla joins the pons 2,3.

What is the main function of medulla?

Your medulla oblongata is located at the base of your brain, where the brain stem connects the brain to your spinal cord. It plays an essential role in passing messages between your spinal cord and brain. It’s also essential for regulating your cardiovascular and respiratory systems.

What is the function of the medulla in kidney?

The main function of the medulla is to regulate concentration of the urine. The urine flows from the collecting ducts into the renal calyces and pelvis, which undergoes unidirectional peristaltic movements to allow drainage of the urine into the downstream ureter and bladder.

What is function of medulla oblongata?

What is the function of pons and medulla?

An important function of pons and medulla is the autonomous control of the body’s vital functions. For example the cardiovascular (medulla) centers receive sensory inputs from the heart and blood vessels (mechano-, baro- and chemoreceptors) via the vagus nerve and modulates heart rate and blood pressure.

What is the main function of medulla oblongata?

What structures help medulla?

tuberculum cinereum: A raised area between the rootlets of the accessory nerve and posterolateral sulcus that overlies the spinal tract of trigeminal nerve. cerebellar peduncle: The structure that connects the medulla to the cerebellum.