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Neurophysiology
A branch of neuroscience that studies the physiology of the nervous system. From the Greek words nerve and nature, this science looks at the way that nerves function.
321 Questions
What does a neurophysiology tech do?
A neurophysiology tech is responsible for conducting tests to evaluate and monitor a patient's nervous system function. They may perform brain wave scans, nerve conduction studies, and other diagnostic tests to help diagnose conditions such as epilepsy, nerve injuries, or neuromuscular disorders. Their role is crucial in assisting healthcare providers in making accurate diagnoses and treatment decisions.
ST - In regards to excitable cell (i.e. neurons) the minimum mV need to trigger a AP (action potential) and is around -40mV (although this may vary depending on the cell).
In additional to this; excitable cells (i.e. neurons) shows an all-or-nothing property, such that if the stimulus threshold is not met the action potential will not be created.
How is a nerve impulse carried?
Nerve impulses are signals carried along nerve fibers. These signals convey, to the spinal cord and brain, information about the body and about the outside world. They communicate among centers in the central nervous system and they command your muscles to move.
Nerve impulses are electrochemical events. Observed as an electrical event, a nerve impulse is called an action potential (AP) because it involves a change in electrical potential that moves along the nerve cell. It can be measured as an electrical potential difference between the inside and the outside of a nerve fiber. That option has not been generally available to the beginning student. Instead, the nerve impulse has ordinarily been observed as a voltage change along the outside of the sciatic nerve of the common grass frog, Rana pipiens.
Rana pipiens and its relatives have long been favorite subjects for introducing students to the physiology of nerve and muscle. For serious investigations, use of frogs will continue to be justified, but the consumption of this resource for routine teaching ought now to be reduced, for at least three convincing reasons:
- Computing power has become so effective and so generally available that some essential concepts of nerve electrophysiology can as well or better be conveyed by simulation and example rather than by use of live material.
- In the frenzy of trying to make the real specimen perform properly during a student exercise, important ideas are often omitted or are lost because of equipment failure or operator ineptitude.
- Frog populations worldwide appear to be diminishing at an alarming rate, and biologists, of all people, ought not abet this decline.
Topics 1-11 afford a review of some aspects of single-neurone transmembrane characteristics. With this background,the student is prepared to appreciate the whole-nerve behavior illustrated in topics 12-30. The latter are based on actual cathode-ray-oscilloscope records of the type obtained by students in a laboratory course.
this info was taken off http://www.bio.fsu.edu/easton/intro.html
A motor neuron and all of the skeletal muscle cells it stimulates is called a?
A motor neuron and all of the skeletal muscle cells it stimulates together form a motor unit. The motor neuron sends signals to the muscle cells to contract and produce movement. Each motor unit typically controls multiple muscle cells to allow for coordinated and efficient movement.
What is the function of the pia mater?
The pia mater is the innermost layer of the meninges that surrounds the brain and spinal cord. Its function is to provide a protective covering for these structures and to help support and nourish the central nervous system through its rich blood supply.
In which direction does a nerve impulse usually move?
A nerve impulse typically moves in one direction, away from the cell body of a neuron and towards the axon terminals. This unidirectional flow ensures efficient communication within the nervous system.
The Circle of Willis is a circle of arteries that provides main blood supply to the brain and the surrounding structures.
It is important as prevents ischemia(shortage of blood to tissues) thus preserving cerebral perfusion when one or more artery in the brain is blocked due to throbosis or embolism.
What are some examples of neurophysiology?
Examples of neurophysiology include studying nerve cell communication, investigating the function of different parts of the brain, examining the role of neurotransmitters in signal transmission, and exploring the electrical activity of neurons.
What can your neurology degree do for you?
There are many health and science-related careers available to those holding a master degree in Neuroscience. Some jobs include nurse practitioner, biostatistician, speech-language pathologist, and genetic counselor.
Neuritis is a generic term meaning Inflammation of a nerve (neuro=nerve, itis=Inflam.) To be more specific you then put the type or name of the nerve with neuritis. Median nerve neuritis is carpal tunnel syndrome a nerve that runs through your wrist. Ulnar neuritis is a nerve that runs through your elbow etc...
Where do they store all autopsied bodies brains since never get put back into the body?
After an autopsy, the brain is typically stored in a container filled with formaldehyde or another preservative solution. It is then kept in a storage facility within the medical examiner's office or pathology department. The brains are used for research, teaching, or any further investigations that may be required.
Diplomate of the American of psychiatry and neurology?
A diplomat of the American Board of Psychiatry and Neurology is a physician who has completed specialized training in both psychiatry and neurology. This qualification indicates that the individual has met the rigorous standards set by the board and is recognized as having expertise in the field.
Why is the brain stem called the primitive part of the brain?
The brain stem stem could be called the "primitive part of the brain" because it was the first brain structure to evolve, and is responsible for our basic vital functions like breathing and heartbeat.
What does it mean when two people often have the same thoughts?
Having the same thoughts or ideas could indicate a strong connection or similar perspectives between the two individuals. It may also suggest that they are in sync or have a shared understanding of a particular topic or situation.
What are the different types of neuritis?
Neuritis is inflammation of a nerve. There are different types of neuritis such as optic neuritis (affecting the optic nerve), cranial neuritis (involving the cranial nerves), and peripheral neuritis (affecting peripheral nerves outside the brain and spinal cord). Each type can have various causes and symptoms.
What prevents acetylcholine from accumulating in the neuromuscular junction?
The presence of an enzyme called acetylcholinesterasethat degrades acetylcholine is what prevents an accumulation of the neurotransmitter and sustained muscle contraction. Acetylcholinesterase is an enzyme that can be found within the neuromuscular junction. Thus, when a nerve impulse causes the release of acetylcholine at the neuromuscular junction, there is a critical time in which the neurotransmitter can bind to receptors on the muscle before it is degraded.
The oval window is connected directly to which passageway?
cochlea *scala vestibuli* and the round window is directly connected to the scala tympani (where sound dissipates)
"The scala vestibuli is continuous with the vestibule near the base of the cochlea, where it abuts the oval window."
From: Human Anatomy, 5th Edition Marieb, Mallatt, and Wilhelm
Why is amiltriptyline prescribed for ulnar neuritis?
Amitriptyline may be prescribed for ulnar neuritis to help manage nerve pain, reduce inflammation, and improve sleep. It can also help with symptoms such as tingling, numbness, and weakness associated with the condition. However, it is important to consult with a healthcare provider to determine the most appropriate treatment plan for ulnar neuritis.
When an action potential reaches the end of a neuron it triggers the release of?
neurotransmitters from the synaptic vesicles into the synapse. These neurotransmitters then bind to receptor proteins on the adjacent neuron, initiating a new action potential in the postsynaptic neuron.
What is the central nervous system made up of?
Comprised of the brain and spinal cord
The nervous system is the key to homeostasis. The nerves are what keep your body in proper working order and all of those nerves stem from your brain through your spinal cord to reach its destination, then the nerves return to the brain the same way. Therefore, if your spine and atlas are out of whack even a little bit the nerves are not transmitting correctly and that causes a lack of homeostasis.
A person may be asystematic for a while or they may experience symptoms that seem completely unrelated because they have no pain along the spinal cord.
For instance, cancer cells do not just appear, they are developed through a lack of communication if you will. Think of it as a computer, when nerve cells "files" cannot reach their destination appropriately the "file" can get corrupt. This corruption then develops abnormalities and dysfunctions. Of course other factors apply to the production of cancer, but a healthy spine is the key to a healthy body.
Another example is tension headaches; these headaches occur due to the atlas being out of place. There are multiple problems that can be helped by having a healthy spine; erectile dysfunction, chronic constipation, sinus infections, otitis media, etc. A healthy spine can also improve a person's attitude or happiness.
- Chiropractic care is more cost effective then traditional medical treatment involving medications that relieve symptoms but do not treat the underlying problem. Do some research on what nerves travel through each section of your spine, starting from C1 down to T12. It is really fascinating.
A nerve impulse travels from one cell to another by passing from?
A nerve impulse travels from one cell to another by passing from the axon of one neuron to the dendrite of another neuron at a synapse. Neurotransmitters are released into the synaptic cleft, where they bind to receptors on the postsynaptic neuron, initiating a new electrical signal in the receiving cell.
What neurotransmitters are involved in bipolar disorders and what do they do?
Dysregulation of neurotransmitters, such as dopamine, serotonin, and norepinephrine, is linked to bipolar disorder. Dopamine is involved in reward and pleasure, while serotonin regulates mood and anxiety. Norepinephrine plays a role in arousal and stress response. Imbalances in these neurotransmitters can contribute to mood swings and other symptoms of bipolar disorder.
How the endocrine system and nervous system work together when the body is under stress?
During stress, the nervous system activates the "fight or flight" response by releasing hormones like adrenaline. These hormones are produced by the endocrine system and help prepare the body to deal with the stressor. The endocrine system also releases cortisol to help regulate the body's response to stress, working in coordination with the nervous system to maintain homeostasis.
What is the Latin word for pain?
I believe Doleo would be the verb (doleo dolere), the word for pain ie a pain (noun) is dolor, doloris (masc)
What are the sources of stimulation that start a nerve impulse?
Sources of stimulation that can start a nerve impulse include chemical signals (neurotransmitters released at synapses), physical stimuli (such as pressure or temperature changes acting on sensory receptors), and electrical signals (generated by neighboring neurons or external electrical sources). These stimulations can trigger the opening of ion channels in the neuron's membrane, leading to changes in membrane potential and initiation of an action potential.
