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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
How can a 14-year-old learn to fall asleep at 10 pm when he typically goes to sleep at 11 pm?
The flipside could work in your favor. Simply trying to getting up an hour to an hour-and-a half earlier might help to adjust that internal clock. In the old days this was not hard because chores dictated a natural drowsiness, if ya'no'whatta'mean !! Good luck...BB Force yourself to get up early every day, then turn on plenty of light or go out in the sunlight and exercise. Bright light when you first get up helps your body set it's internal body clock. If you do that you'll have less problem sleeping at 10:00
Compare and contrast vision mirror neurons and audiovisual mirror neurons.?
Vision mirror neurons are specialized neurons that activate when an individual observes an action being performed, helping in understanding and imitating behaviors. In contrast, audiovisual mirror neurons respond to both visual and auditory stimuli, enabling the integration of sight and sound when observing actions. While both types of neurons play crucial roles in social cognition and learning, audiovisual mirror neurons offer a more complex understanding of actions by incorporating multi-sensory information. This difference highlights the varying levels of processing involved in observing and interpreting behaviors in a social context.
Why is the sciatica nerve so painful?
The sciatic nerve is a large nerver running down into your leg. It is a fairly thick nerve and contains pain receptors as part of the bundle. Often times the nerve will become pinched either between your muscles or between muscle and bone, or in a few cases bone and bone; these are all known as sciatica. Since it provides sensation to your entire leg you will feel the pain from it throughout your entire leg. The intensity of pain is caused because it is an actual nerve being pinched as opposed to just a single receptor. Many people will go to massage therapists, reflexologists, or chiropractors to correct sciatica.
How long does Ramsay-Hunt Syndrome last?
it's been 3 weeks now and the pain in my ear is driving me mad please help me
What are 2 main parts of nervous system?
The central nervous system (CNS) and the peripheral nervous system (PNS)
Can your bed cause pins and needles?
If you are sitting/squatting/laying in the wrong position, your limbs may get pins and needles, regardless of the bed
Do all visceral motor neurons synapse in a sympathetic ganglion?
No; some axons synapse in nearby autonomic ganglion. postganglionic fibers travel along either sympathetic nerves or rejoin at the spinal nerve.
How do stimulatory neurotransmitters affect the membrane potential of the postsynaptic membrane?
This really depends on the postsynaptic cell and the NT in question. Assuming you are talking about neuro-muscular interactions, the membrane potential moves from a more negative state to a more positive state.
What is an advantage of a spinal reflex if you touch a hot stove?
It is hard to choose an answer as you give no "following".
As far as these reflexes go, they involve only two neurons. One for sensation (heat) and one for motor (pull away). This is the fastest type of reflex and prevents the most damage. A third signal goes to the brain as a "report".
The signal travels though the nerve endings in the hand to the spinal cord. From there, it reaches the brain and in less than one second, your body realizes the pot is hot, causing you to react by quickly removing your hand from the hot pot.
Yes, and the ability to feel pain. (That doesn't mean they have long term memory, anticipation or emotions like birds and mammals). See:
http://www.dailymail.co.uk/news/article-492557/Claws-concern-Scientists-suggest-prawns-lobsters-feel-pain-just-like-humans.html
What are the two important principles related to nerve impulses?
1. The All-or-None Law states that the impulse is independent of the properties of the stimulus which started it. As long as the nerve cell is stimulated by an impulse of a certain minimal strength, it makes no difference how strong the exciting impulse is - just as a match or a blowtorch produces the same reaction in a fuse. It either fires or does not and there are no shades in between. The nerve impulse remains at the same strength as it travels along the nerve fiber, just as the spark remains at the same intensity as it moves along the fuse. The reason for this is evident in what has been said about a stimulus releasing energy in the fiber. It does not contribute energy.
Impulse size and speed: The nerve impulse varies with the size of the fiber. (It is proportional to the square of the fiber's diameter.
The size of the nerve impulse also depends on the condition of the fiber - being altered if drugged, deprived of oxygen, fatigued or in an abnormal state.
2. The Frequency Principle states that there are more impulses per second with the stronger stimulus than with the weaker stimulus. A stronger stimulus produces impulses more frequently than the weaker stimulus. The frequency of nerve impulses is thus a function of the intensity of the stimulus.
How do you describe cranial nerve?
There are 12 pairs of nerves that directly arise from the brain and stem. There are others that arise in pairs from the spinal cord.
Where does a receptor send nerve impulse to?
To mordor via the shire and imagination land. Before reaching the brain they must first collect magical pixie dust from the moon, in order to make pancakes.
A single type of channel will open, permitting simultaneous flow of sodium and potassium.
How do muscles repair themselves?
Like any other part of the body that gets hurt or damaged, the blood runs to the injury, and heals it up. The bone marrow and bone start to regenerate until it it fully healed.
What is suprascapular nerve entrapment?
a rare type of entrapment syndrome that most often occurs in athletes. The major symptom is a dull pain near the shoulder blade, which can progress to weakness and muscle atrophy.
What is mean by the all or none response of a neuron?
The simplest sense, the all-or-none principle of neuronal firing means that a neuron will either fire or it won't, there is no "half" firing. When a neuron receives excitatory input.
Neural transmission across a mammalian synaptic gap is accomplished by?
impulses causing the release of a chemical signal and its diffusion across the synapse.
How many motor neurons are involved in the descending motor pathways?
two motor neurons are always involved in descending motor pathways. the upper motor neuron and the lower motor neuron.
