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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.
7,659 Questions
What are the common ailments of the nervous system?
- 2 answers
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What are some common ailments of the nervous system?
- 2 answers
What is vasomotor tone?
- 1 answer
Constant level of nervous stimulation to the muscles in the blood vessel walls. This gives the muscles a resting level of contraction.
What is permissive action as in the nervous system?
- 1 answer
sdsgs
How fast are hormonal responses?
- 1 answer
Slower than nervous responses.
Varies according to what hormone, for example the hormone epinephrine (adrenaline) works almost instantaneously to initiate increased mental alertness among other things. Some hormones take longer to take effect but most take action relatively quickly seconds -> hour
Do animals without a brain feel pain?
- 1 answer
NO They don't!
No. People who's lost sensation in their limbs actually feel no pain in them, analysis shows that it's because the nerve connections have been severed from the brain.
Is nervous tissue avascular?
- 1 answer
No.
Avascular means that it does not get blood.
Is Xanax a stimulant of the central nervous system?
- 1 answer
Its a depressant.
Well, the individual that answered before pretty much hit the nail on the head. I will add some detail to the answer. Xanax is the trade name of alprazolam tablets, developed by Upjohn (Pfizer made the acquisition, so Pfizer produces the Trade name tablets). I will just use Xanax when referring to alprazolam.
Xanax is a benzodiazepine, it is related to Valium, Ativan, and Klonopin. Xanax is used generally treat anxiety disorders and it is the most written prescription for benzodiazepines in the United States. It works well for reducing intense anxiety for example, panic attacks, anxiety attacks, and generalized anxiety disorder some cases. Benzodiazepines have largely replaced barbiturates, which were used prior to the advent of benzodiazepines. Benzodiazepine safety profile remains far superior barbiturates which is why they have largely replaced them. However, it is not stimulant of the central nervous system unless also paradoxical effects occur.
How do natural systems move toward entropy?
- 1 answer
Basically everything will reach an equilibrium, and homogeneous mixture of "everything", if given enough time. Living systems stay living by maintain a specific range of disequilibrium within its components (for the most part). The 2nd Law of thermodynamics states basically that temperature, pressure, and chemical potential goes into equilibrium given enough time. this equilibrium is entropy, when things become compartmentalized (ordered) its always do to living systems.
Is a nerve an organ?
- 1 answer
Yes nerve is an organ of nervous system ., Each nerve is a cordlike structure that contains many axons. These axons are often referred to as 'fibres'. Within a nerve, each axon is surrounded by a layer of connective tissue called the endoneurium. The axons are bundled together into groups called fascicles, and each fascicle is wrapped in a layer of connective tissue called the perineurium. Finally, the entire nerve is wrapped in a layer of connective tissue called the epineurium.
How are neurons categorized in the nervous system?
- 1 answer
into either motor or sensory
parasympathetic or sympathetic
adrenirgic or nicotinic
Should you take Atenolol for an essential tremor?
- 1 answer
Atenolol is an off-label drug prescribed for essential tremor. Currently, there is no FDA approved drug for this movement disorder. There are other treatment options, including other off-label drugs and Deep Brain Stimulation.
What would happen if parts of the nervous system wasn't there?
- 1 answer
If you had no nervous system, you would not be able to move, feel any sensation, experience any emotion or thought.
If parts weren't there, for example, the spinal cord, you would lose all physical sensation from your spinal cord down and would have to breath through a respirator. You would not be able to move.
If your brainstem went missing, you'd be dead. This controls heartbeat and respiration.
If your brain went missing, you wouldn't even know you existed.
If your autonomic nervous system went missing, you would be dead because your heart would stand still in your chest.
The foramen magnum is the structure that divides the?
- 1 answer
medulla oblongata from the spinal cord
Is the retina part of the nervous system?
- 1 answer
yes it is. it is one of the 5 senses
The cranial nerve responsible for chewing is?
- 1 answer
The trigeminal nerve (the fifth cranial nerve, also called the fifth nerve, or simply CNV or CN5) is the one responsible for chewing!
Is oxygen transport a function of the nervous system?
- 1 answer
While it is true that the nervous system controls and regulates all the functions of the body, the actual transportation of oxygen throughout the body begins in the cardiopulmonary system, where oxygen is taken into the lungs and oxygenates blood that flows into pulmonary veins going to the heart, and from their it makes a circuit through the body and into the right side of the heart which receives oxygen poor blood, pumps it through the pulmonary circulation to pick up more oxygen, and from there back to the left side of the heart where it starts a new circuit through the veins and blood vessels delivering fresh oxygen to the body's cells and organs.
What would happen if the heart did not have nerve tissue?
- 1 answer
The muscles in the heart respond to an electrical stimulus to contract (beat). If there were no nerve tissue, the heart would not beat and a person would cease (or fail) to exist. Failure of the nerve stimuli, if nerve tissue is there (but for whatever reason there is a malfunction of the signal getting to where it needs to be), results in a condition called "Heart Block" and that can necessitate the implantation of a Pacemaker to produce the missing electrical stimulus constantly or intermittently as needed.
What are the receptor membranes of gustatory cells?
- 1 answer
Gusatory hairs gustatory hairs
What diseases affect the nervous system?
- 1 answer
Alzheimer's Disease is a degenerative brain disease. It ultimately results in loss of brain function. Victims may have a short attention span, memory problems, and a change in personality.
It can lead to death if at one of the last stages.
Amyotrophic Lateral Sclerosis (Lou Gehrig's Disease). ALS controls voluntary muscle movement
autism.
Bell's palsy
brain abscess
brain tumor
Broca's Aphasia
Cerebello-Olivary Degeneration of Holmes
Cerebral Palsy: Loss of muscle control and coordination. A motor disorder. Could be caused by injuries when victim was a baby while his/her brain was developing.
Choroid Plexus Papilloma
acute confusion (one of the most common metal disorders in the elderly; a disturbance of the brain caused by physical illness elsewhere in the body)
diabetic neuropathy
epilepsy (neurons occasionally malfunction and begin to fire together over and over, disrupting ordinary cerebral processing and causing unconsciousness or convulsions; can usually be controlled with medication)
fibromyalgia
Guillain-Barre Syndrome
Huntington's Disease: An inherited disorder. Loss of neurons that release acetylcholine and GABA. One symptom is chorea, which is involuntary rapid jerky movements. Mental deterioration also occurs. Death usually occurs 10-20 years after first symptoms.
Klüver-Bucy Syndrome
Locked-In Syndrome
Meningitis,
Multiple sclerosis is so-named for the multiple sclerotic lesions on the axons of neurons. In the central nervous system, multiple sclerosis attacks the myelin sheath of the axons, affecting the ability to conduct action potentials. Various effects of multiple sclerosis include muscle weakness and spasms, ataxia, dysarthria, chronic pain, etc. This chronic disease can affect young and middle-aged adults.The course of this illness usually involves recurrent relapses followed by remissions, but some patients experience a chronic progressive course. The underlying cause of the nerve damage remains unknown. Multiple Scerosis affects different parts of the brain and spinal cord, resulting in typically scattered symptoms. These can include: Unsteady gait and shaky movement of the limbs (ataxia); Rapid involuntary movements of the eyes (nystagmus); Defects in speech pronunciation (dysarthria); Spastic weakness and retrobulbar neuritis (= inflammation of the optic nerve).
Myalgic Encephalomyelitis (ME) A condition characterized by extreme disabling fatigue that has lasted for at least six months, is made worse by physical or mental exertion, does not resolve with bed rest, and cannot be attributed to other disorders. Unknown.Often occurs as a sequel to such viral infections as glandular fever. Extreme disabling fatigue that has lasted for at least six months, is made worse by physical or mental exertion, does not resolve with bed rest, and cannot be attributed to other disorders. The fatigue is accompanied by at least some of the following: Muscle pain or weakness; Poor co-ordination; Joint pain; Sore throat; Slight fever; Painful lymph nodes in the neck and armpits; Depression; Inability to concentrate; General malaise.
Neuralgia Maybe due to previous attack of shingles (Postherpetic Neuralgia). A severe burning or stabbing pain often following the course of a nerve. Neuritis A disease of the peripheral nerves showing the pathological changes of inflammation. (This term may also be less precisely used to refer to anydisease of the peripheral nerves, usually causing weakness and numbness.) Inflammation of the nerves, which may be painful.
Parinaud Syndrome
Parkinson's Disease Degenerative disease process (associated with aging) that affects the basal ganglia of the brain. Associated with a deficiency of the neurotransmitter dopamine.Also associated with aging. Tremor, rigidity and poverty of spontaneous movements.The commonest symptom is tremor, which often affects one hand, spreading first to the leg on the same side then to the other limbs. It is most profound in resting limbs, interfering with such actions as holding a cup. The patient has an expressionless face, an unmodulated voice, an increasing tendency to stoop, and a shuffling walk. Parkinson's degenerates the nervous system slowly. Parkinson's Disease: Results from damage to the basal ganglia. Neurons that release dopamine degenerate in Parkinson's Disease. An imbalance of neurotransmitters occurs. Symptoms include tremors, rigidity of facial muscles, slow movements, and short steps while walking.
Pituitary Adenoma
Sciatica
senile dementia (disorder which results from the slow process of natural nerve cell loss; may become noticeable between the ages of 70 and 80; although the dementia begins with recent memory, it may gradually) continue until the person forgets his relatives and even his own name
Shingles: Acute infection of the peripheral nervous system. It is caused by herpes zoster (the chickenpox virus). When a person gets chickenpox and recovers, the virus doesn't die off. Instead, it "hides" in the dorsal root ganglion. When the virus reactivates, and the victim has a weakened immune system, it leaves the ganglion and travels down sensory neurons to the skin. It then causes a line of blisters and pain.
spinal cord injury
spongiform encephalopathy
syphilis (late stage)
tetanus (also known as lockjaw because severe spasms of the jaw muscles make it hard to open the mouth)
Tourettes' syndrome is characterized by recurrent and uncontrollable twitches and/or movements
Wallenberg Syndrome
Weber Syndrome
Wernicke Aphasia
Wernicke/Korsakoff Syndrome
Wilson Disease
a stroke
brain cancer
and some other things... there are 16 diseases that can sffect the nervous system and they are:
no scratch that there are 17 diseases that affect the ner vous system and the most commonly known among the 17 is tourettes syndrome. I'm sure we ave all seen the guy with teretts vid...
1. Alzheimer Disease
2. Broca Aphasia
3. Cerebello-Olivary Degeneration of Holmes
4. Choroid Plexus Papilloma
5. Huntington Disease
6. Klüver-Bucy Syndrome
7. Locked-In Syndrome
8. Multiple Sclerosis
9. Parkinson Disease
10. Parinaud Syndrome
11. Pituitary Adenoma
12. Tourette Syndrome
13 Wallenberg Syndrome
14. Weber Syndrome
15. Wernicke Aphasia
16. Wernicke/Korsakoff Syndrome
17. Wilson Disease paralysis,
served connection between neurons
parkinsons disease
What division of the autonomic nervous system responsible for fight or flight?
- 1 answer
The( sympathetic division) preparation of the body for emergencies("flight-or-fight") Increased activity of this division results in increased blood pressure,respiratory rate, glucose and blood flow to muscles.
What is the medical term meaning protrusion of the spinal cord and the meninges?
- 1 answer
Myelomeningocele is protrusion of the spinal cord and meninges.
Does Synthetic drugs affect the nervous system?
- 1 answer
yes because the drugs can make you hillusinate and go crazy and you can kill yourself by scracthing to much on crack
Which Autonomic Nervous System fibers release acetylcholine?
- 1 answer
ALL pre- and post-ganglionic parasympathetic nerve cells
PRE-ganglionic sympathetic nerve cells
POST-ganglionic sympathetic nerve cells to sweat glands ONLY
What causes lip twitching?
- 1 answer
Muscle twitches or spasms can be caused by a number of factors, mostly stress or fatigue. A diet low in potassium has also been found to increase the likelihood of involuntary musclular twitches.
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