Table of Contents
- 1 What does the medulla directly controls?
- 2 Which nerves carry impulses from the brain to the body?
- 3 What structure receives impulses?
- 4 Which sends impulses from the skin?
- 5 What are the 5 main parts of a neuron?
- 6 What are the 5 elements of the reflex arc?
- 7 Where does the medulla connect to the spinal cord?
- 8 Is the medulla part of the brain stem?
What does the medulla directly controls?
Medulla oblongata: The base of the brain, which is formed by the enlarged top of the spinal cord. The medulla oblongata directly controls breathing, blood flow, and other essential functions.
Which nerves carry impulses from the brain to the body?
Motor neurons transmit nerve impulses from the brain and spinal cord to a specific area of the body.
What structure receives impulses?
Neuron Structure The cell body contains the nucleus and other cell organelles. Dendrites extend from the cell body and receive nerve impulses from other neurons. The axon is a long extension of the cell body that transmits nerve impulses to other cells.
What is the first structure stimulated in a reflex arc?
The reflex arc is a special type of neural circuit that begins with a sensory neuron at a receptor (e.g., a pain receptor in the fingertip) and ends with a motor neuron at an effector (e.g., a skeletal muscle).
What body part sends messages to the brain?
The Hindbrain The pons and the medulla, along with the midbrain, are often called the brainstem. The brainstem takes in, sends out, and coordinates the brain’s messages. It also controls many of the body’s automatic functions, like breathing, heart rate, blood pressure, swallowing, digestion, and blinking.
Which sends impulses from the skin?
First-order neurons receive impulses from skin and proprioceptors and send them to the spinal cord. They then synapse with second-order neurons.
What are the 5 main parts of a neuron?
The primary components of the neuron are the soma (cell body), the axon (a long slender projection that conducts electrical impulses away from the cell body), dendrites (tree-like structures that receive messages from other neurons), and synapses (specialized junctions between neurons).
What are the 5 elements of the reflex arc?
The reflex arc consists of 5 components:
- sensory receptor.
- sensory neuron.
- integration center.
- motor neuron.
- effector target.
What are the functions of the medulla oblongata?
Cristian Zanartu, MD, is a licensed board-certified internist who has worked for over five years in pain and palliative medicine. The medulla oblongata carries signals from the brain to the rest of the body for essential life functions like breathing, circulation, swallowing, and digestion.
When does a malformation of the medulla occur?
Rare malformations in the medulla can occur at birth, but many of the problems associated with this area or due to physical injury, or injuries that can impact this part of the brain such as drug overdoses or strokes.
Where does the medulla connect to the spinal cord?
The posterior—or back—of the medulla is divided into two parts. The superior section connects to the fourth ventricle of the brain, and the inferior section connects to the spinal cord through the median fissure.
Is the medulla part of the brain stem?
Facial nerves and respiratory function are often spared damage in this syndrome. Detecting damage to the medulla and other parts of the brain stem can be difficult, as people who have injuries here may not be able to fully participate in an examination.