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Nervous System
This category is for questions about the mechanical and chemical process of reactions to internal and external stimuli, ranging from the brain down to the spinal cord, and all nerves, cells and tissues in between.
3,047 Questions
What does a high amplitude mean in nerve conduction studies?
Amplitude is not that important. If anything the area under the curve would be more informative. A good amplitude does mean a good recording though.
Tickle nerves are nerve points in a human body that are sensitive to touch. There are lots of sensitive nerve ends in the feet, so that's why the feet are a popular ticklish spot. These nerves are everywhere, armpits, feet, legs, ribs, thighs, neck, everywhere! It just depends whether the person's tickle nerves are more or less reactant. For example: Sarah's tickle nerves in her feet are not that sensitive, which means Sarah does not have ticklish feet.
How does the synaptic nervous system affect the iris?
The iris is not innervated directly, however the iris sphincter muscle is affected by the sympathetic and parasympathetic nervous systems. Sympathetic stimulation causes pupil dilation while parasympathetic nervous system causes pupil constriction. The parasympathetic response is quicker because of the proximity of a parasympathetic ganglion (ciliary ganglion) to the eye. The sympathetic response is slower because all sympathetic ganglia are confined to the spinal cord. This is the reason why people adjust faster to a bright shining light than darkness.
Body coordination is ones control of his body. eg: doing many things at same time with both hands, or balance yourself or something else.
-to be able to do what you want using the right muscles right away.
In fractures of middle cranial fossa absence of tears is due to lesions in which nerve and why?
The lacrimal gland produces tears in response to parasympathetic stimulation by the greater petrosal nerve. The greater petrosal is nothing more than a renaming of the parasympathetic fibers contributing to the facial nerve after it exits the internal acoustic meatus. It is this opening in the temporal bone that might be damaged in a cranial base fracture, and might also involve a lesion to the greater petrosal nerve. This would also cause an absense of tear formation. If you want to know more, wikipedia has an excellent discussion of the cranial nerves, and here is a link to the facial nerve page: http://en.wikipedia.org/wiki/Facial_nerve Hope that helps!
What is the peripheral nervous system?
It includes nerves arising from brain and spinal cord innervating different parts of the body respectively called as, cranial and spinal nerves. Comprises of all nerves which connect the central nervous system with receptors and effectors. Nerves connecting the receptor organs to the CNS are called sensoryor afferent nerves; they contain sensory fibres only. Nerves connecting the effector organs (muscles and glands) to CNS are motor or efferent nerves; they contain motor fibres only.
A third type of nerve, the mixed nerves have both sensory and motor nerve fibres. Nerves connected to brain are called cranial nerves while those connected to spinal cord are spinal nerves. On the basis of presence and absence of myelin sheath around the axons the nerve fibres are myelinated or nonmylinated, respectively.
• Each nerve is composed of many nerve fibers enclosed within a connective tissue sheath. A nerv fiber is along axon or dendrite of a neuron, which could be either sensory or motor or both
. The periphery of something is its edge, or outside parts.
Thus that part of the nervous system which is not designated the Central Nervous System (the brain, spinal chord and retina) would be regarded as the peripheral nervous system. It consists of sensory neurons, clusters of neurons called ganglia, and nerves connecting them to each other and to the central nervous system.
Why is rolling your eyes considered rude?
Rolling your eyes is considered rude because it is a gesture as you've got to be kidding or is she even thinking? Its kind of like if you were talking and I let out a big sigh.
Because it shows that you're not interested in what they have to say, and it's equal to flipping someone off. == ==
Is Insullin a neurotransmitter?
No, it's a "sugar transmitter" , it transports sugar to be used by the different organs of the body. So less insulin produced, more sugar concentration in the blood.
Why would you have no abdominal reflexes?
An abdominal reflex is a polysynaptic reflex (as being superficial reflex) that is stimulated by the stroking of the abdomen around umbilicus. If thereÕs no abdominal reflex, it is the effect of a physiological absence due to tolerance or obesity.
What controls body temperature in the nervous system?
The Hypothalamus controls body temperature, thirst, fatigue etc.
Which part of the nervous system acts as the coordinator in the passage of a nerve impulse?
Synapses are the part of the nervous system that coordinates the passage of nerve impulses. They are the junctions between neurons.
Which genetic disorder is characterized by a buildup of fatty tissue in the nervous system?
Tay Sacks disease is a genetic disease in lipid is accumulated in brain .It also called lysosomal storage disease .
The sympathetic and parasympathetic nerves work in opposite directions to balance each other?
false the nerves work int the same dircetion. the sympathic nerves control vital organs and the parasympathic control the non vital organs.
How does meth affect the nervous system in a positive way?
You only think that methamphetamine affects the nervous system in a positive way because you get high when you use it, but you will pay a terrible price for your entertainment.
What is the peripheral nevorus system?
It is located outside of the central nervous system and consists of nerves and sensory receptors, it carries impulses formed by receptors, such as pain and sound receptors, to the CNS and it carries impulses from the CNS to effectors, glands and muscles that carry out actions directed by the CNS
