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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
What is the diameter of a nerve?
Nerves are pretty small. Consider that the human spinal cord, with its many, many nerve pathways, is under 10 mm in diameter at it widest point. Individual nerves have diameters ranging from perhaps 4 to 100 micrometers, depending on the location.
What is the difference between nerve and neuron?
A neuron is an individual cell in the PNS or CNS that can be excited and conduct impulses along its axon.
A nerve is a bundle of multiple neuron fibers that each are carrying their own signals. They are protected by connective tissue. Eventually the neuron fibers diverge away from the nerve to reach their destination.
What is the mechanism of a conduction of an action potential across a synapse?
Exocytosis occurs releasing neurotransmitters into the synapse. They diffuse across the synapse to receptor sites on ligand-gated sodium ion pores on the post-synaptic neuron, causing those pores to open, allowing sodium ions into the receiving neuron.
Those sodium ions cause an electrotonic signal to travel down the dendrite and soma to the axon hillock; these signals are considered to be a graded response, in that they may be more or less strong.
If the strength (level of voltage) at the axon hillock is sufficient, it will trigger voltage-gated sodium pores to open in the initial segment of the axon, which will allow more sodium ions into the axon at that point, causing v-gated ion pores a small distance away to open, letting more sodium ions in, opening more v-gated ion pores yet further awy to open, etc,; this process is known as an action potential.
(The neurotransmitters in the initial receptor sites has to be removed to close the ligand-gated sodium ion pores at the beginning of this process so that the neuron does not just fire continuously.)
What are the afferent and efferent fibers for Pretectal nucleus of the midbrain?
- It receives its afferent light impulses from the retina and occipital cortex.
- it gives efferents to the Edinger-Westphal nuclei of both sides.
What are similarities neuro synaptic transmission and nerve conductive have?
both are electrical movement
The Aural nerve is a nerve in your ear, how ever I am not quite sure of the exact job. Hope it helped:D
You mean "you're" (= "you are"), not "your", which is "your" as in "your book."
And we don't usually say, "You're on my nerves." We say, "You're getting on my nerves."
So your question should be, "What if you're getting on my nerves?"
The answer to that question is already on WikiAnswers. Go to http://www.answers.com/nerve and check "idioms."
Nerve fibers of the olfactory tracts lead to?
The olfactory tract is split into medial and lateral.
Their projections are to 5 different areas of the brain- anterior olfactory nucleus, olfactory tubercle, Piriform cortex, Amygdala, Entorhinal cortex
The lateral tract originates from the olfactory epithelium separates into mitral cells and tuft cells. mitral cells synapses onto all 5 of the regions to ultimately synapse onto the orbitofrontal cortex via the thalamus or the frontal cortex. tufted cells on the other hand only synapse onto the anterior olfactory nucleus and the olfactory tubercle
The medial or vomeronasal tract projects to mitral cells that synapse only to the Amygdala
receptive field
Is a hip pointer is a nerve injury.?
No, a hip pointer is not a nerve injury; it is a type of contusion or bruise that occurs on the iliac crest of the pelvis, typically resulting from a direct impact or trauma. This injury affects the muscles and soft tissues around the hip, leading to pain and swelling. While it may cause discomfort that can radiate to nearby areas, it primarily involves muscle and connective tissue rather than nerves.
How important is sleep to your overall functioning throughout the day?
Some sleep experts suggest that neurons used during the day repair themselves during sleep. When we experience sleep deprivation, neurons are unable to perform effectively, and the nervous system is impaired.
What is the branching filaments that that conduct nerve impulses towards the cell?
Dendrite is the branching filaments that conduct nerve impulses towards the cell.
It refers to the underside of something, usually a fish. Also refers to the belly area.
Nerve blockades, which involve the injection of an anesthetic into the area around a sensory or motor nerve that supplies a particular region of the body, preventing the nerve from carrying nerve impulses to and from the brain.
