Facial nerve and it’s applied part

hi everyone myself dr. Saeed mmds conquer so today's topic for the MDS finish line is on facial nerve and it's applied aspects so the facial nerve is actually very important if we shall nerve and the trigeminal nerve with the anatomy subject is very important for the basics paper for almost all the departments so first of all if it comes as an essay or a short answer anything should be started with writing the contents okay if it is very short you can avoid that writing the contents but for the essay writing the contents part is very important so these are the contents that you can write for this facial nerve so and in case if it comes as an essay so this particular discussion or this particular presentation is how to write an essay okay because they say is 20 mark so you have write a bit lengthy so you can write like this if it comes as a short you have to cut short and you have to write water exactly important okay so in case if it comes in as an essay it's better to write that all the facial nerve or sorry all the other cranial nerves and to let the examiner know that you know all the cranial nerves as well okay and amongst that you can highlight the facial nerve to be 7th and you can even highlight that it is both mixed but that is it's both sensory and motors you can highlight that it is make mixed nerve and you can highlight that it is 7th grain you'll know ok so I have to write the introduction like it is a seventh cranial nerve and it comes from the or ii drink a lot so it's nerve of the second brain collage also called as hired arch and it is actually composed of around 10,000 neurons and 7,000 of which are myelinated and in a way the nerves of facial expression so you can write the introduction like this ok so coming to the development part you have to say that we have to write that it is from the second brain kale arch okay that's very important so which supplies it's both motor and the sensory components so you can draw this diagram so diagrams are equally important students because they have see no one has very good time to read the entire lines that you write okay you have to give importance to headings and little important lines that which are very important with that particular topic and the diagrams if you can put your diagrams in there especially for anatomy like subjects then it will score or it will be very much scoring ok so here you can draw the simple diagram and no need to write all the other nerves where they here lies the facial nerve right with the second brain collage you can give or you can highlight that the others if you can draw it's even more useful but if you can draw the facial nerve it can just draw the outline and if you can highlight the facial nerve then that's more than enough actually but if you can draw all the others also its scoring ok it's based on your time while writing the exam so next this is the time during the general gist station when the anatomical structures actually appear with this cranial nerve that is seventh cranial nerve so you have to write this in order to increase the bulk of your answer so if you can remember and write this it's very it's very useful so write the exact week of gestation and how the structures are formed at that particular week so you can have a look of this and write so especially you can highlight the 7th the week of gestation where the geniculate ganglion which is a ganglion for the seventh cranial nerve you can highlight that and the last that is 12th week of gestation the facial muscles are formed so both these are very important the others if you can just give a brief for this that's more than enough but have if this comes an essay and if you can write this that will be very useful so next coming to the nuclei which are very very important for this facial nerve so you have to keep the headings of course and that thing will be highlighted in your diagram but these headings are important so these are the four important nuclei with respect to the facial nerve okay so here again you can draw this small diagram if you can so here you again you can write this nucleus okay these nuclei the motor nuclei of the cranial seventh cranial nerve seven the supriya celebratory nucleus and the lachrymatory nucleus okay and the other one is attracted solely Taurus which is on this side so you can draw this diagram which is from your show Russia so it's very important okay so among in the pawns it is that those nuclei there so you have to draw those nuclei okay so simple no need to draw this complex diagram for your understanding I've put this diagram so from the superior celebratory nucleus comes a nerve which is called as nervous intermedius and the postganglionic fibers will go and it will be innovated at the there you go palatine ganglion okay from there the prick sorry preganglionic fibers will innervate the delica palatine ganglion and from there the postganglionic fibers will innovate the lacrimal gland under to that of the hard and soft palates as you can see here it innervate the lacrimal gland and that of the hard and soft palates so it is like this you have to remember so we have to how to write as preganglionic fibers innovate that particular Daniel and postganglionic fibers innovate the lacrimal gland and the patterns of palates similarly there is one more ganglion here as you can see the submandibular ganglion so preganglionic fibers will go and innovate there and the postganglionic fibers from the submandibular gland will innovate the submandibular and the sublingual gland it is so simple okay and one more important aspect related to the facial nerve is its as per its taste it is for the gustatory sensation or the taste sensation for the anterior 2/3 of that tongue so how does it do is it from the nuclear that is nuclei sollett aureus and from there via geniculate ganglion which is a ganglion of the seventh cranial nerve comes called a tin pan in of this called a timpani nerve as you can see will innovate the anterior 2/3 of the tongue just have a look of this diagram so that you can have a better idea okay so in short you can give this box and you can nicely giver like this you can draw a box and you can give like what all inner weights and what is nuclear and all that so that will be very useful it will be scoring so no need to put on everything but whatever you can put on there it's enough so especially these three are very important there's a solitary is the nucleus solitarius nuclei and the motor fibers which actually innovate the facial muscles and then the visceral motor so from the superior celebrated nucleus especially to the lacrimal ZAR mandibular and the sublingual gland so these things you have to highlight this box if you put in it will be good so coming to the ganglion so now that we have given the introduction we have given the development and also we have given the nucleus and the nerves that come out of the nucleus and the ganglions related so again one more heading you can go for the ganglion so what are the ganglions later to the fashion of at these three ganglions so you can give them again a little in a brief description of those ganglion of how how it works and all that okay you can see here how would the was on so geniculate ganglion we have seen the for the sensory taste fibers and spin of palatine and pet deliver palatine for the lac leman and submandibular glands will ganglion for the submandibular and the sublingual glands okay the parasympathetic set it on motor fibers are to these glands so like that you can write so again the Fae are the five famous branches of the facial nerve you have to highlight students so you can see in this particular picture it innervates the parotid gland and when it comes outside it innovates of five it has its five branches to which it innervates the facial muscle so these are the five branches as you can see they include the temporal branches I go to diagrammatic branch the the buccal brands a marginal mandibular and the cervical branch so like that you can highlight okay so again one more head thing you can give it as a branches and distribution so within the facial nerve canal are these the get greater petrosal nerve two-step ideas and the quadrat in panic at the exit from the stylo master foramen are these three that is post auricular digastric and the stylo heart and again after innovating the parotid gland the terminal branch are these five so you can highlight like this so this diagram which is they're from shale Russia has to fall for the facial nerve so you have to draw this diagram so it's very simple you're already well aware of this so you can draw these three nuclei as we have already discussed the lachrymatory and the superior saliva tea nucleus a nucleus tractus solitarius and the motor nuclei and again you have to draw like this exactly how it is you have to draw so the sensory root vibrate the greater petrosal it innervates the the lacrimal gland and the terrible palatine ganglion and all that and again via chorda tympani it innovates a tongue and again via it crosses and for the motor nucleus again goes and gives it motor fibers to the five branches so this diagram is very important which is there in your show Russia so you need to draw this diagram so again after drawing this diagram you can get that water all nerves supplies to those specific muscles if you again draw a box that will be very useful okay so if you again draw this box it will be very useful so you can see what all nerve supplies to those specific muscles it's simple the name then then of itself has the muscle name so you can write like that so diagram if you follow the rest all you can elaborate the answer so again the vascular supply of the fashioner is also equally important so intra cranial e it is anti inferior several artery within the facial canal and again extract linearly so what are the branches and what are the vascular supply again to this facial nerve you have to write okay so this is a brief anatomy of the facial nerve that you need to put in so you have to write the nuclei you have to write the branches of the facial nerve okay and you have to draw the diagram this is very important and the ganglions associated with this so three headings should be there the branches and the nuclei as well as a ganglion associated so all these if you put forward with a beautiful diagram it's enough so development diagram you can draw and again the nucleus what are the nuclei associated also you can draw so three diagrams if you draw that's enough okay then again you can elaborate the answer of history so the patient has come you have to take the detailed history of all these which are there next you have to do this particular test like the shimmer test since a fashion nerve innervates a lacrimal gland the Shema test is only to test the if there is any dryness of the IOC octoman so you have to put a filter paper in the eye and do and you have to measure the wetness of the filter paper okay like that the shimmer test is done to check for syrup thal mia and also you can check for the taste you can ask the patient to taste something and whether you have to differentiate whether it's sweet or sore or something like that you can ask him to do so and also the celebrity flow you can test all these you can do okay so so coming to the various applied aspects so for any even if any question for any Department applied aspects is very important so we know the main applied aspect related to the fashion of Isabelle's pal say that has to fall in okay so it should be like it can be supranuclear or infra no clear so what are the main differences of the supranuclear you can see in this diagram okay so you have to follow this so in supranuclear so if it is before about that there were the nucleus then the lower part of the opposite side is being paralyzed if it is in Freneau clear the whole of the same side is paralyzed so that you can see in this diagram okay so next what are the reasons for the facial nerve injury it could be trauma either because of any forceps delivery or penetrating the middle layer and all that any bone fractures or what are the Rays reasons for the facial paralysis are all these it iatrogenic could be the local anesthesia that causes the transient facial paralysis and also the parotid or mastered surgery so so this diagram again if you put it in the applied aspects that will be enough so with the if the level of injury and the symptoms shown so this is again from your Chou Russia if you put in that will be enough okay so draw this diagram as well it will add on to your marks then idiopathic reasons could be the Bell's palsy them consider simple syndrome and the heat fort syndrome infections it could be otitis media master writers Ramsay Hansen Roman encephalitis so this if you can put it's good the bilateral conditions and then you didn't actually conditions as you can see so these is just the names if you can write that's good and if it is and or medicine ro path students then if you can give other description of these syndromes that will be again add padding to your point so just have a look of these syndromes if you can add some points to these like for example may concern Washington syndrome we know it's a trial right so it has the colitis granulomatosis and squirtle tongue as well as facial pulses so like that if you add to every of these conditions to each of these conditions and it would be useful so next Bell's palsy you can give the definition that's enough so definition is enough and where is this more common that you can write it's enough and then what is the etiology so you can write these so clinical features of Bell's palsy is very important so even if it is transient facial nerve palsy it also shows same clinical features so you have to write these clinical features it's it's enough if you write all these ok ones if you see these and if you can go through this person you can correlate then it will be useful for you to remember so that's it so you have to start with the anatomy you have to start with introduction you have to give a brief of development or fort and then you have to go into the anatomy of its nuclear of its associated ganglion and the branches and wherever required you have to put in diagrams and then you have to come to the history part of how you take the history and what are the tests you do and then you have to go for the applied aspects where then you have to write the facial pal see whether it's in front of clear or supra or supranuclear and then you have to give the various causes of or how the facial palsy can occur and you can give the diagram of the symptoms at which the part the symptoms are shown if you draw the diagram from your cherish it's it's scoring and again the other and bilateral conditions and if you put more symptoms of the bell spells or facial palsy freesias that's enough so this is how you present the papers we have to write the contents and to conclude you have to write that anatomy of the efficient of us is that most important for a dental practitioner or because it to go to perform any dental procedures so like that you can conclude so the conclusion is not that important just you can conclude with one line or two lines the main thing is a Content ok the contents are headings and the diagrams is important that's it so references you can give your references and wherever I have highlighted some articles you can even write those articles if you want