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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 cranial nerve allows you to smile?
Smiling is an action produce by more than one muscle but the nerve that allows you to do that is the facial nerve (7th cranial nerve). Facial nerve has 5 branches and the action of all 5 allows you to smile nicely. The temporal branch allow you to wrinkle your forehead, the zygomatic branch allows you to partially close your eyes, the buccal branch allow you to elevate your chin, and the marginal mandibular allow you to widen your mouth laterally.
What do you call the ailments of the nervous system caused by infection with polio virus?
ceribal palsy
Are the eyelid controlled by cranial nerve?
Occulomotor nerve (CN III) controls levator palpebrae so yes, the eyelids are controlled by cranial nerves.
Why do infants turn their heads and suck in response to a touch on the cheek?
The rooting reflex causes an infant to turn her head in response to a touch on the cheek. This reflex assists in breastfeeding until finding the breast is a learned behavior. The reflex usually disappears by the time the baby is four months old or so.
How many divisions of the autonomic nervous system are there?
The autonomic nervous system is responsible for the control of the functions of the internal organs and it has two divisions. These are the sympathetic nervous system and the parasympathetic nervous system.
What are three main functions of the nervous system?
Three main functions of the nervous system are:
1. To receive sensory information from outside and inside the body;
2. To store & to process that information;
3. To cause actions relating to that information toward maintaining life.
What is the average reaction time of a human?
Its about 0.2 seconds for a human who is aware that something is about to take place. That's 1/5 of a second which sounds pretty good, huh?
For a human who is unaware of something its closer to .3 seconds.
-Also on a side note, prolonged used of most drugs increases reaction time drastically
yes, actually it is. look up VNS on the web, its one of the newest tx for med resistant depression
pons
This is a good defintion for the brain.
What is the unit of speed of rotation of a motor?
Motor speed is a term we often use to speak to the rotational speed of a motor. And often we talk about the speed of rotation in revolutions per minute, or RPM.
How are mosquitoes associated with nervous system infections?
Moquitoes are well known to be mechanical reservoirs for many viruses that cause neurologic disease. Some of the more well known are West Nile Virus, Eastern Equine Encephalitis and St. Louis Encephalitis - all of which can cause severe disease and death in humans.
What are the five parts of the nervous system?
Bones, flesh, muscles, nerves and viens
Other way, heart, lungs, digestive system, kidney and brain
Does the nervous system include the brain the nerve cord and sense organs?
Yes, the nervous system includes the brain, the spinal cord (often referred to as the nerve cord), and sense organs. It is responsible for processing sensory information, coordinating responses, and controlling bodily functions. Together, these components enable organisms to perceive their environment and react appropriately.
Does the somatic nervous system mix your food in your stomach?
No. The autonomic nervous system is responsible for controlling the muscle activity of your stomach.
