Nerve transmissions in the ear?
597162
It is fact that the cochlea "transforms" sound vibrations into nerve impulses. Your question is complicated by the fact that the auditory nerve is a part of the cochlea.  The cochlea is the best answer but not as clear cut as other people may present it.\n\nThe ganglia (collection of nerve cell bodies) of the auditory nerve is found in the spiral ganglion of the cochlea.  These auditory nerve's dendrites are a part of the organ of Corti thus complicating the question.  If you really want to get specific, there are these cells in the Organ of Corti called hair cells.  These cells are the ones that transmit vibrations of the basilar membrane to the dendrites of the auditory nerve.  Thus the auditory nerve itself is not the primary sensor of the vibrations, but it is only one cell away!
1108277
"Many nerve cells are of the basic type illustrated above. Some kind of stimulus triggers an electric discharge of the cell which is analogous to the discharge of a capacitor. This produces an electrical pulse on the order of 50-70 millivolts called an action potential. The electrical impulse propagates down the fiber-like extension of the nerve cell (the axon). The speed of transmission depends upon the size of the fiber, but is on the order of tens of meters per second - not the speed of light transmission that occurs with electrical signals on wires. Once the signal reaches the axon terminal bundle, it may be transmitted to a neighboring nerve cell with the action of a chemical neurotransmitter. "\n\ni studied this once when i was in matriculation college. i found this quite useful. hope this will help ya..\n\ngood luck
637350
INFORMATION IS CONDUCTED ELETROCHEMICALLY BY THE NEURONS THROUGH VARYING CONCENTRATIONAS OF Na and K ions across the myelin seath of the neurons.in a neuron at rest there is more conc. of k ions on the inner side(this is the polarised region) and more conc. of Na ions on the outer side(depolarised region) .thus the inner side is at a greater potential than the outer side .when a stimulas is received the conc. in a particular regin of the neuron begins to change. K IONS move to the outer side and Na ions move to the inner side.now in that part of the neuron the outer membrane is at a higher potential than the the inner membrane. in the outer region the Kions are surrounded by large number of Na ions due to this a current sink develops and the K ion move back to the inner side while Na ions move back to the outer region and this region gets repolarised.but the region next to this gets deolarised in the process.thus the nerve impulse travels across the neuron as a wave of polarisation, depolarisation and repolarisation.\n           as the nerve impulse reaches the terminals of the neuron called dendrites the vesicles present there release ascetylcholine and this neurotransmitter transfers messages from one neuron to another and the above process continues till the message reaches the concerned organ.
470235
The previous poster is right.  It's particles in the air "vibrating" (caused by pressure differences) that enables you to hear.  That is why in space, which is a vaccuum, you cannot hear anything.  There is nothing to transmit those pressure differences to your ear.
993111
It is not tinnitus.  TInnitus is described as any sound (usually ringing or buzzing) that you HEAR in your ear.  If you are FEELING a sensation then it is not tinnitus.  \n\nMy two thoughts are:\nIt could be a muscle spasm.  The stapedius muscle contracts in response to loud sounds to protect your hearing.  If you have been exposed to a loud environment (anything as loud as a lawnmower can cause hearing loss) then it could be having spasms from abuse.  Usually this would occur in both ears, unless there was an acoustic trauma to just the right ear.  The key here is to always protect your hearing by wearing hearing protection. \n\nThe eustachian tube could just be popping.  Some people can actually feel this (I can actually feel mine when it pops).  Do you have allergies or sinus problems?  Allergies are high right now, so that could be a cause.  \n\nMy advice is to see an otologist or otolaryngologist (commonly known as an ear, nose, and throat specialist/ ENT).  If you have never had a hearing evaluation that would be very important.  What concerns me is that you have it only in the right ear.  Best to have a doc check it out to make sure nothing serious is going on.
897254
1. Nerve anatomy: nerves are axons of a neuron, enclosed by myelin, and are part of the peripheral nervous system. Afferent nerves carry sensory information from the body to the dorsak root ganglia of the spinal cord and then to the brain (although cranial nerves go directly to the brain). Efferent nerves carry motor information from the brain to the body (muscles) to contract or relax. \n\n2. Reflex architecture: reflex arc. Sensory info (i.e. pressure) activates specialized sense receptors-->sends afferent signal to dorsal root ganglia of spinal cord-->sends info to interneuron-->sends info to ventral root-->sends efferent info to muscle-->muscle contracts (or relaxes, muscles work in pairs).\n\n3. Embryo forebrain-->telencephalon (cerebral cortex, basal ganglia, and limbic system). Midbrain-->Mesencephalon (thalamus, hypothalamus). Hindbrain-->metencephalon (cerebellum and pons) and myelencephalon (medulla oblongata).\n\n4. Functions of what?\n\n5. Hearing: consists of outer, middle, and inner ear. Outer ear is ear canal, middle ear is the ear drum and 3 smallest bones in body (hammer, anvil and stirrup), inner ear is the cochlea. Sound waves travel through the canal, cause the ear drum to vibrate, which moves the 3 bones, which causes the fluid in the cochlea to move, which activates the hair cells (receptors) that send infor to the auditory cortex in the brain.\nVision: from the outer eye to inner eye, you have cornea, iris, pupil, lens, vitreous humor, and the retina (which has the receptors). Within the retina, you have photoreceptors, bipolar cells, ganglion cells, and amacrine cells. Photoreceptors are rods (light) and cones (color). From the ganglion cells, information gets sent to the primary visual cortex in the brain.\n\n6. The spinal cord is long tube protected by vertebral column. It has white matter (axons or nerves from above definition) on the outside and gray matter (cell bodies) on the inside. The gray matter kind of looks like a butterfly in the spinal cord.\n\n7. Cerebellum: coordinated movement\nThalamus: sensory relay station\nCerebrum: divided into 4 sensory lobes, performs several higher functions such as language, emotion, and memory.\nHypothalamus: controls autonomic nervous system and endocrine systems (4 F's: fighting, feeding, fleeing, and mating...)\nMedulla: controls vital functions (cardiovascular, respiration, and skeletal muscle tone).
951775
http://www.ata.org/\nhttp://www.medterms.com/script/main/art.asp?articlekey=20474 :\nRinging in the ears: Medically called tinnitus, this can arise in any of "the four sections of the ear" -- the outer ear, the middle ear, the inner ear, and the brain -- and can be due to many causes including ear infections, fluid in the ears, Meniere syndrome (the combination of tinnitus and deafness), some medications such as aspirin and other nonsteroidal antiinflammatory drugs (NSAIDs), aging, and ear trauma (such as from the noise of planes, firearms, or loud music). In rare situations, tinnitus may also be due to an aneurysm or an acoustic neuroma (a benign tumor on the acoustic nerve). Woodwind players are more likely to experience tinnitus than other orchestral players, probably because they usually sit just in front of the brass. If tinnitus persists or its cause is unknown, a hearing test (audiogram) should be done. Measures can be taken to lessen the intensity of tinnitus or to mask it.
868126
if you are asking why older people cant hear higher sounds this is why...Sound is collected by the pinna (the visible part of the ear) ...yada yada yada... the vibration is eventually transferred to the snail-shaped cochlea in the inner ear; the cochlea is lined with sensitive hairs which trigger the generation of nerve signals that are  sent to the brain. People can usually hear sounds in the frequencies between 20 and 20,000 Hertz at birth. The higher frequencies are picked up by the smaller hairs, which are more brittle. As we age the more brittle ones break off and thus we lose our abilty to hear high frequencies.
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.
353806
T-tubules transmit nerve impulses throughout the muscle.  Think of it this way.  Your biceps muscle is composed of many different muscle cells working together.  When your brain tells your biceps to contract, does it send individual nerves to every single muscle cell?  No it doesn't (I guess that really isn't an obvious answer).  This is where the T-tubules come in.  They transmit electrical impulses from one muscle cell to another.  This way, only some muscle cells need to be activated by a nerve--the rest will be signaled through the T-tubule network, so that all of the muscle cells will contract together.\n\nSo what happens when you block the T-tubules?  Your muscle doesn't work so well anymore.  You might still get cell-to-cell communication (I'm not sure), but even if you did, it would be slow so that the muscle fibers would not contract synchronously.\n\nAddendum: It's been 6 or 7 years since I last studied physiology, so I think you should listen to the professor, not me!
26570
The problem is that the brain is receiving signals, usually pain, that it thinks are coming from nerves that have been removed, by amputation, injury, or whatever reason. (Phantom pain also occurs in the form of phantom tooth aches in people who have had all of their teeth removed.)\n\nThe question is where do the signals that the brain is receiving come from. There are several steps involved in getting a signal from the source, the sensory nerve ending, to the brain. The system of communication is so complex in the nervous system, it is hard to track exactly how the signal progresses through the body. Where the signal starts is unclear, because it can not start at the nerve ending.
477323
This question can't answered until you find out what has caused it.  The condition is called Tinnitus, and it is usually permanent, and nearly untreatable.  It is also usually progressive, meaning that it gets worse as you get older.  It is caused by the sensor hairs being permanently bent over in the cochlear section of the inner ear, or by nerve damage. See an audiologist, fast.  It can be brought on, or aggravated, by certain medications.  Ibuprofen and antibiotics make mine worse.  But the most important thing to know is; recognize if you are causing the damage yourself.  Do you work with power tools?  Shoot guns?  Play your stereo way too loud / in the clubs regularly or jam with the band unprotected?  If yes to any of these, then it is you that is causing the damage, and it will only get worse.  People have committed suicide because the noise drove them mad.  So; to sum up, get checked out, and take a close look at your habits.  Damage can occur in thousandths of a second, and once done, there is NOTHING that can be done to repair or heal it.
578403
THe majority if it is in the semicircular canals; a little bit of it is in a small area attached to them.\n\nBalance, however, is sensed by hairlike projections INTO the fluid that does the sensing, as the fluid's intertia causes it to "flow" when the head moves...\n\nThe semicircular canals are close to the cochlea, by the way...
786890
veins transmit deoxygenised blood toward the heart (except for pulmonary veins), while nerves transmit electrical impulses from the brain to sensory organs, or vice versa. \n\nsimple as that! peace.
431489
vestibulocohlear & auditory & acoustic & eighth * 8th. the vibration of air molecules sets up sound waves that are transmitted to the outer ear, the middle ear, the inner ear, the ear drum and the small bones of the ears. Small nerve fibers from the vestibulocochear nerve(or auditory nerve or acoustic nerve or 8th cranial nerve) transmitt the stimuli to the brain where it is interpreted as hearing. Small fibers from the vestibular portion of this nerve are located in the semicircular canal of the inner ears and control equiibrium.
842289
In what respect?\nYet more general questions asked by inquisitive ... erm.... well... I shall try to answer...\n\nThey are both substancial collections of atoms... formed into molecules... mostly water though a fair number of hydrocarbons and amino acids, among other similar structures. \nThey're both animal cells...  presumably human animal cells in this case... That means they have a cell membrane, nucleus, mitochondria and various smaller organelles.\n\nAside from that, we have the specifics of those cells:\nThey're both rather skinny for one thing... lengthy and skinny. Neurones... i.e. nerve cells.... can however be easily as long as the entire length of your forearm... and yet thinner than most cells. Sperm are very much smaller than that. \n\nFeature-wise... nerve cells have dentrites... branching extensions of the cell membrane... at each end. These are to connect to other neurones and transmit signals between them. The signals are transferred through the cell itself along the axon... which is the long, thin bit in the middle.... by means of an ionic differential gradient between potassium and sodium ions. In almost all cases, neurones will be found in bundles (since they're so thin) to cover a wide area and send as much data as possible to and from the brain.\nThere are different kinds of neurones that serve different functions.... in particular motor neurones (which transmit data from the brain to the body)  ... well... whatever the opposite ones... sensory neurones maybe... (which, by whatever name, transmit data from the sensory organs to the brain)... and interneurones... which join the others together inbetween.  As I recall, the neurones in the brain are of different types again, but I don't know the slightest thing about those.\nAnyhow... I don't think I can tell you much more about nerve cells.\n\n\nSperm on the other hand... are male gametes.... produced in vast numbers at very little bodily expense per cell. Each one is basically just a haploid nucleus (one copy of each chromosome) with a flagellum (a 'tail' to propel the cell forward) and just enough cytoplasm and mitochondria to power it for a short journey. They are generated at quite an alarming rate in the testes.... and their entire purpose is to be ejaculated into the female reproductive system and propel themselves forcefully and rather erratically to an awaiting ovum.... Eventually, of the ones that reach the ovum (most die along the way due to the corrosive substances which coat the inside of the uterus), one will get chemically accepted by the larger cell and allowed to fuse the cytoplasms together. The nuclei will then fuse into a single diploid (2 of each chromosome) nucleus.... and the newly fertilised cell will begin to divide.  Note however that while the nucleus of the sperm is allowed to fuse with the nucleus of the ovum... the mitochondria that are in the sperm will be destroyed by the new host cell.... hence all the mitochondria you will ever have are near-identical copies of your mother's ones (not perfect copies since mutations can and will occur between generations).\n\n\nRight... I've had enough of answering this question now...\nOff to other things.
710005
Yes, this happens b/c of the increased blood flow to the area. It makes all of the nerve endings much more enhanced. IT ROCKS DOESN'T IT. (Same thing in prenant women too.)