Does autonomic nervous system plays role in dilating/constricting blood vessels in the brain?
405194
yes. since autonomic is the n.s that u can't control
278020
I have been told that when you get upset or nervous more blood does go tot he brain and cause the areas to swell with all that extra blood and it causes pressure in the brain and pushes on the nerves and gives you a headache\n\nso try to calm yourself down and relax, put a clod compress on your forehead and neck and relax.\n\ngood luck\nI hope this helps
591527
During Sex the vascular system engorges with blood to create the erection.  Unfortunately also the Cranial vascular system also dilates and a migraine type head ache can occur in some people.  The headache syndrome occurs in men who use erectile dysfunction prescriptions also for the same reason. You have heard the old adage of 'taking a cold shower' that was done to accurately lower the blood pressure and the engorged vascular system.  The blood pressure prescription is what most doctors use. You also may be having too frequent sex  or masturbation and stressing your body.   Take it easy, your body isn't a wind up toy............Good luck to you...
34609
If you think the brain and the heart work together then all organs work together with the Brain.  Asthma is a respiratory disease where the bronchioles shrink and close off restricting the amount of air getting into the air sacs.  If you have a serious attack you will lose consciousness because of the lack of oxygen to your brain, but most medication can prevent this from happening.
230369
The brain controls "lower" or involuntary activities such as heartbeat, respiration, and digestion - these are known as autonomic functions. The brain also controls "higher" order, conscious activities, such as thought, reasoning, and abstraction. The human brain is generally regarded as more capable of these higher order activities than any other species.\n\nThe human brain is thought to be the source of the conscious, cognitive mind. The mind is the set of cognitive processes related to perception, interpretation, imagination, and memories, of which a person may or may not be aware. Beyond cognitive functions, the brain regulates autonomic processes related to essential body functions such as respiration and heartbeat.\n\nExtended neocortical capacity allows humans some control over emotional behavior, but neural pathways between emotive centers of the brain stem and cerebral motor control areas are shorter than those connecting complex cognitive areas in the neocortex with incoming sensory information from the brain stem. Powerful emotional pathways can modulate spontaneous emotive expression regardless of attempts at cerebral self-control. Emotive stability in humans is associated with planning, experience, and an environment that is both stable and stimulating, especially during early developmental years.\n\nThe 19th century discovery of the primary motor cortex mapped to correspond with regions of the body led to popular belief that the brain was organized around a homunculus. A distorted figure drawn to represent the body's motor map in the prefrontal cortex was popularly recognized as the brain's homunculus, but function of the human brain is far more complex.\n\nThe human brain appears to have no localized center of conscious control. The brain seems to derive consciousness from interaction among numerous systems within the brain. Executive functions rely on cerebral activities, especially those of the frontal lobes, but redundant and complementary processes within the brain result in a diffuse assignment of executive control that can be difficult to attribute to any single locale.\n\nMidbrain functions include routing, selecting, mapping, and cataloguing information, including information perceived from the environment and information that is remembered and processed throughout the cerebral cortex. Endocrine functions housed in the midbrain play a leading role in modulating arousal of the cortex and of autonomic systems.\n\nNerves from the brain stem complex where autonomic functions are modulated join nerves routing messages to and from the cerebrum in a bundle that passes through the spinal column to related parts of a body. Twelve pairs of cranial nerves, including some that innervate parts of the head, follow pathways from the medulla oblongata outside the spinal cord.\n\nA definite description of the biological basis for consciousness so far eludes the best efforts of the current generation of researchers. But reasonable assumptions based on observable behaviors and on related internal responses have provided the basis for general classification of elements of consciousness and of likely neural regions associated with those elements. Researchers know people lose consciousness and regain it, they have identified partial losses of consciousness associated with particular neuropathologies and they know that certain conscious activities are impossible without particular neural structures.
282482
Nervous system damage and organ failure.
1115918
nervous system = consist of brain, nerves and spinal cord.\nrespiratory system = for breathing\ncardiovascular system = circulation of blood\ndigestive system = digestion of food\nurinary system = excreting of urine from our body\nlymphatic system = body defenses\nexcretory system = sweat glands\nintergumentary system = skin\nreproductive system = ovary and testes
836877
Smooth muscle. It is part of the autonomic nervous system. This muscle helps to control the pressure and flow in the arteries of the body.
279887
Let me preface this: I'm not a medical professional; I have taken several anatomy classes that give me a basic background. I can't speak for every case, but here's my two cents on the subject. The vagus nerve innervates the heart and provides input into the speed of the heartbeat. It also branches into a few organs in the abdomen, but its primary purpose is to affect heart rate. The heart has its own internal pacemaker which beats around 100 beats/min at rest. The vagus stimulates the heart to actually beat SLOWER than it otherwise would. The better physical fitness, the slower it beats at rest because the heart is more efficient.\n\nIf the vagus were to be blocked, all communication below the blockage would essentially stop (for example when someone has an injury where their spinal cord is severed, doctors can tell exactly where the sever happened based on what functions and what doesn't). I'm not familiar with blockages of nerves, per se. There are ways that nerves can be damaged or severed, resulting in loss of communication above and below the damage. So it would depend largely on the degree of nerve damage/blockage and where exactly it occurs.\n\nTo actually get to your question, I do not know if vagal nerve blockage would cause high blood pressure. High blood pressure is related to a decreased level of elasticity in the blood vessels (primarily the arteries). With every beat of the heart, the arteries expand from the increased pressure. When they are less flexible (from arteriosclerosis or atherosclerosis, for example), blood pressure increases. Blood pressure can also increase with exercise (the heart tries to pump more blood through the body faster). Assuming that the vagus would be damaged above the heart so that it doesn't tell the heart to beat slower, there's a chance it could affect blood pressure: a chronic fast heart rate may affect elasticity of the arteries. The arteries would not have as much time to relax/contract between each beat. It's possible, but I don't know.\n\nAs for vomiting, it may or may not affect it. I don't know which other organs the vagus affects. It is quite possible that at least one of them is related to digestion. Also, the fast heart rate (and probably a feeling of fluttering heart beat) could make you light headed or nauseaus. Whether you actually vomited from it would depend on how that affects you.\n\nSorry I couldn't provide any solid answers, but I hope the background info gives you some help.
1028206
the term is vasovagal - and it refers to anything that causes the vagas nerve (starts in your brain and works throughout the neck, chest and abdomen)..... If this nerve is overstimulated, it causes the heart to slow down and the veins in the body to dilate (expand) (can be caused by coughing, rubbing your eyes, straining to force a bowel movement). Often, we only notice this if it causes us to faint or feel faint.... usually is not indicitive of anything serious
1045061
Sympathetic innervation to the sweat glands.  The sympathetic nervous system (the one with epinephrine and norepiphrine... known to most lay people as adrenaline) causes blood vessels in the peripheral parts of your body to narrow and reduce blood flow, making it cold.  This is a mechanism of shunting blood to the more important parts of the body, such as muscles in a fight or flight response.\n\nIn addition, the sympathetic nervous system causes sweat glands to contract and release sweat.\n\nThe sympathetic nervous system also causes your heart to beat hard and fast, reduces blood to your stomach and intestines, etc.
462432
The sympathetic nerves arise in the brain in the reticular formation, a diffuse set of nuclei (cell bodies in the brain or spinal cord) and send axons (bioelectrical transmission lines) the the lateral horn of the spinal cord.  The reticular formation receives incoming pain signals as well as higher input from the hypothalamus, cortex and elsewhere.  The axons descending to the lateral horn snynape (form chemical connections that communicate with the next neuron by chemicals known as neurotransmitters) with the cell bodies of motor neurons.  These motor neurons send myelinated (myelin is a biological insulator) axons to the ganglia (collections of cell bodies outside the brain and spinal cord) for the sympathetic nervous system.  These ganglia include a long chain that entends from the cervical to the lumbar regions, plus other ganglia in the head and adbominal cavity.  This synapse typically releases the neurotransmitter, acetylcholine, which acts on nicotinic type "N" receptors - nicotinic-ganglionic receptors.   Nicotinic "N' receptors are distinguished from nicotinic "M" receptors (the neuromuscular junction) that serve skeletal muscle by differing responsiveness to pharmacological agents.  The post-synaptic (cell that receives the chemical signal) neurons are not mylenated and project to the visceral organs, skin, and blood vessels where they release neurotransmitters (norepinephrine or, in the case of skin, acetylcholine) that act on the effector organs.
1003824
Yes cardio = heart\n\nBut don't forget the vascular part of it also.  We typically lump heart and blood vessels together because the function of this system is to deliver blood to the different parts of your body. \nYes end organ damage is the brain but why do we say its a cardiovascular disease.  Well its because the cause of the stroke is typically from a heart or blood vessel problem.  The underlying problem before the stroke is not the brain but rather either your heart or blood vessel.  In other words, your cardiovascular system was diseased and caused the stroke.  Major causes of strokes are atrial fibrillation, carotid artery stenosis, hypertension, rarer causes intrancranial aneurysm or patent foramen ovale and these are all diseases of the cardiovascular system and not of the neurological system.  \n\nIn reality, neurologist and usually not cardiologist treat strokes.  But if the stroked patient has atrial fibrillation, a cardiologist could be used.  If the the stroke was caused by carotid stenosis, a vascular surgeon is used.
404299
Parasympathetic autonomic nervous system originates craniosacrally. Sympathetic nervous system orginates as a thoraco-lumbar outflow.
356574
Yes. It is governed by the autonomic system that resides within your sub-conscious. We do not have to THINK consciously,  about where to send our breathing, how much synovial fluid to distribute within the joints, or even how much current to distribute whne we activate(Innervate) a motor end plate(Muscle). That is the beauty of allowing our natural self manage the essentials while we use our faculties to create!
1022232
The pathophysiology of migraine headaches is not clearly understood. Growing evidence supports the role of neurogenic peptides, such as serotonin and dopamine, in the brain. These vasoactive neuropeptides stimulate an inflammatory cascade with the release of endothelial cells, mast cells, and platelets. This inflammation causes vasodilation and a perivascular reaction (local inflamation around the blood vessel). The vasodilation may promote this perivascular reaction, in the sense that when vessels dialate they become "leaky" allowing a greater amount of inflamatory mediators to escape. The blood brain barrier is higly sensative to inflamation and can be disrupted. You must also consider, that the brain is very sensative to any for of irritation.
592547
Your question is hard to understand, but here is some basic information about the nervous system in humans/animals.  \n\n\nThe nervous system of an animal coordinates the activity of the muscles, monitors the organs, constructs and also stops input from the senses, and initiates actions. Prominent participants in a nervous system include neurons and nerves, which play roles in such coordination.\n\nThe nervous system of vertebrate animals are often divided into a central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord. The PNS consists of all other nerves and neurons that do not lie within the CNS. The large majority of what are commonly called nerves (which are actually axonal processes of nerve cells) are considered to be PNS. The peripheral nervous system is divided into the somatic nervous system and the autonomic nervous system. For example, the human brain is part of the nervous system.