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Nerves
Nerves are thread-like structures that form a network of pathways that transmit information from the brain to the body and the body to the brain, in the form of electrical impulses.
1,605 Questions
Depends on the type of nerve. There are two basic types of nerves. A nonmylnated never sends a single around a meter per second, or 3 feet a second. A mylinated never on the other hand sends a signal around 320 meters/second.
Which type of synapse is most common in the nervous system?
Electrical synapase. it is far more abundant in embryonic nervous tissue, where they permit exchange of guiding clues during early neural development so that neurons can connect properly with one another.
What is the effect of the myelin sheath on synaptic transmission?
Myalin sheath gives insulation to the neurons. They also hasten the nerve conduction by saltatory conduction.
What signal travels along the axon?
The high-speed signals that pass along the axon are called action potentials. They spread in a wave of depolarization.
What does a ion exchange pump transport at the normal resting potential of a typical neuron?
3 intracellular sodium ions for 2 extracellular potassium ions
A motor neuron is an efferent neuron as it 'sends out' a signal as opposed to sensory nerves which are afferent and relay information from the periphery towards the central nervous system.
What type of food stimulates nerve regeneration?
The human body, in its optimal condition, is capable of selecting the most appropriate molecules to rebuild a nerve. So eat in moderation a wide variety of foods and do gentle exercise. Nerves can take up to 2 years to rebuild, but they have a remarkable ability to heal. Don't forget to get ample, regular sleep.
How do neurons communicate with one another?
Neurons communicate by either chemical or electrical synapses. By far the predominant method is chemical though. The neuron releases a neurotransmitter like acetyl choline, glutamate, glycine and others to which the postsynaptic neuron or cell responds to.
Synapses are the contact points where one neuron communicates with another. The dendrites are covered with synapses formed by the ends of axons from other neurons. Neurons are cells within the nervous system that transmit information to other nerve cells, muscle, or gland cells.
What is the correct path that the nerve impulse will follow in a reflex arc?
Slightly oversimplifying it:
- electrically through the cell dendrites, body, and axon via trans-membrane ion transport
- chemically across the synapse via emptying of vacuoles of neurotransmitter by the sending cell into the synapse and binding of this neurotransmitter to matching receptors on the receiving cell, causing it to fire electrically
- repeat from cell to cell down the length of the nerve
What other cranial nerves contain sensory fibers?
The listed cranial nerves provide both sensory and motor innervation:
- Trigeminal nerve (CN V)
- Facial nerve (CN VII)
- Glossopharyngeal nerve (CN IX)
- Vagus nerve (CN X)
...."My 5 year old son is very bothered by loud, busy places/loud noises and tends to "shut down" or struggle when there is a lot of background noise. This is clearly interfering with his ability to function in school and social environments. His Occupational Therapist and Speech Therapist have not been able to offer any real advice on methods to address this problem. Do you have any suggestions? "
....--Patti
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Sensitivity to certain noises and sounds is a very common problem in people
with Asperger¹s who also have sensory integration problems. This problem
is often called auditory defensiveness. Defensiveness occurs because the
individual is often trying to protect themselves from sounds that are very
irritating, scary or stressful. Some individuals are sensitive to only loud
sudden noises, such as fire drills, but others can be sensitive to noises
that others easily screen out, such as the background noises of machines
(e.g. fans, fluorescent lights, computers, ticking clocks, etc.) Also, some
individuals are sensitive to only certain voices, sometimes those that have
a higher pitched sound. Sensitivity to higher frequency sounds is also
common. Every person who has sensitivities experiences them differently.
The frustrating thing is that we can not always control for these sounds
that occur in our everyday environment and unfortunately the world seems to
be a louder place. Electronic sounds and loud music fill our lives. There are many ways to begin to help an individual with sensitivity to
sounds. Providing special accommodations for the individual or trying
methods to change the way sounds are emitted in the environment is
recommended. One might speak with professionals who treat children with
auditory sensitivity. I will try and provide some suggestions for each kind
of solution.
1. If you know that the child will be in an environment that will have
bothersome noises, you can try to provide strong sensory input before hand
that the child likes and helps them feel calm. These are often those that
offer strong input to the muscles and joints and deep pressure to the skin.
Some children like jumping or rough and tumble play. Carrying heavy
weighted objects or pushing heavy objects (wagons or carts) might also help.
2. Provide headphones or ear plugs that the child might use during the noisy
times. To view headphones made specifically for this purpose, log onto
www.sensorycomfort.com They also have a number of books and resources that
address this problem. In school, teachers might allow headphones if not
hooked into music, or some might even allow use of soft, classical music to
use on a Walkman.
3. Use earplugs (e.g. used for swimmers) that will provide protection,
however some children find these uncomfortable. You might try them first to
see how the child accepts them.
4. Some younger children might be do fine with just holding their hands over
their ears, if they are motivated enough to stay for a "noisy" event. For
instance, if they like musical concerts, you might help them cover their
ears to dampen down the sound.
5. I would not recommend taking a young child to fireworks displays if you
know they definitely have auditory sensitivity, However, if an older child
likes fireworks and is familiar with them but has auditory sensitivity, I
would recommend sitting far away and observing them from a distance.
Helping them cover their ears the entire time to dampen the sound might also
be helpful.
6. You might need to remove the child from the area until the sound goes
away or find a quieter corner that is away from the noise. For instance, in
a noisy restaurant try and find a quiet corner away from the kitchen. In a
noisy classroom you might suggest having a very quiet corner for the child
to go to get away from the noise.
7. Use rugs and/or curtains in a room to improve the acoustics of a room and
decrease the loudness of sounds. Turning off fluorescent lights might help.
(Use of natural lighting is often less stimulating anyway.)
8. Warn a child before hand if possible of any pending loud sounds. Let
them know you will be vacuuming the floor or using the washing machine and
help them with a plan to accommodate, whether it be to leave the room, wear
headphones, or use earplugs. In schools where fire drills occur several
times a year, you might speak to the teacher to see if there is a way to
warn the child ahead of time and develop a plan. In a small school or
preschool, you might suggest having the teachers use a soft sounding musical
instrument to warn the children, such as a triangle or soft flute. The
preschool where my daughters attended has used the triangle for years and
has had many a successful fire drill.
9. Educate, educate, and educate! Share your awareness about your child¹s
sensitivity with teachers, family members, neighbors, etc. When a child
know that adults around him/her understand their "hidden" needs, the child
feels safer and is likely to feel less anxious.
10. If sensitivities to sounds become a serious issue that you would like to
see change, there are many specialists who can address these problems with
providing a kind of sensitivity training. Two methods that some people use
are called the Tomatis or Berard methods. These men have each developed
methods of intensive auditory therapy using specialized equipment. Those
using the method must be highly trained and have access to this equipment.
This type of intervention is usually directed at improving auditory
processing and decreasing sensitivity to auditory input although other
benefits are also reported. Many children and adults, especially those on
the Autistic spectrum, have been involved in auditory training. To learn
more about Tomatis, contact www.tomatis.com. To learn more about Berard, or
the Berard Auditory Integration Training system, contact
www.auditory-integration.net. There are some occupational therapists that
have started to combine the use of the Tomatis method and sensory
integration intervention together in their practice.
11. Some occupational therapists also have training with Therapeutic
Listening therapy that they use within the scope of a sensory integration
treatment session and in an intensive home program. To learn more about
this, see www.vitalLinks.net>
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What are the basic parts of neuron?
The three main parts of a neuron are the axon, the dendrites, and the soma (cell body).
The axon carries information away from the soma and transmits it to other neurons. The dendrites receive information from other neurons. The soma contains the nucleus of the cell and protein synthesis occurs here.
What are 5 ailments of the nervous system?
Common ailments of the nervous system include:
Poliomyelitis
Tumor
Cerebral palsy
Cerebral thrombosis
Amnesia
Epilepsy
Meningitis
Paralysis
Encephalitis
Spinocerebellar Degeneration Disease
nana , infection of bacterial inanimous super caoptain barbel
contusion
concussion
parinksons disease
common ailments of the nervous system
1.the coronary is a weak befuddle
head injury,brain tumor,
describe the common ailments affecting the nervous syste? Some of the most common ailments of the nervous system include Multiple Sclerosis and Epilepsy. Some others are Cerebrovascular accident and Transient Ischemic Attack.
Yes it is true that graded potential can be called postsynaptic potentials. When a sensory neuron is excited by some form of energy, the resulting graded potential is called generator potential.
Nerves are composed of nerve cells; the long connecting parts of the nerve cells are called axons. The biochemistry of nerve cells is similar to that of other cells, but they do have an insulating layer, the myelin sheath, which gives them a relatively high concentration of fat.
