Non-Surgical Treatment of Vertigo P
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Non-Surgical Treatment of Vertigo P. GHOSH AND M. S. ROHATGI Majority of the cases with dizziness can be treated medically and physiotherapeutically and very few require surgical interventions. In this report one hundred cases of dizziness have been investigated in a busy otolaryngology clinic, diagnosed and treated with drugs and head and neck exercises. The above have been rationalised on a pragmatic basis as to their modes and sites of actions, interactions with various neuropeptides and recalibration of the vestibular subsystem. Above 80% of the cases were benefited by the regimens laid down in this report. An interestingly significant outcome of this study is that the post-treat- ment neuro-otological findings have not altered much even in those patients who have improved and re- sumed their normal activities. Introduction 'stage of being dysig, meaning stupid fluence or~ the activity of the vesti- or foolish and putting the pragmatic bular nuclei. Thus there are two There is constant interaction aspect of non-surgical treatment of recticulo-vestibular pathways : between the 'phasic' and the 'tonus' dizziness on a rational basis as to the (I) excitatory cholinergic and element and besides havi~.g an sites and modes of actions of different (2) inhibitory monoaminergic. The afferent system, it has also an effec- drugs, their modifying effects on the distribution of nor-epinephrine in tive efferent one, a 'feed-back' and rteuropeptides and, the effect of head the central nervous system is princi- regulating mechanism, that modify and balance exercises with or without pally in the hypothalamus and both the subjective sensation of medications. brainstem reticular system (Vogt, vertigo/imbalance and the objective 1954). The overall activity deperLds findings (Ghosh & Kacker, 1979). Affection of the vestibular sub- upon the balance between these The complexity of the neurones and system, starting from the peripheral transmitters (Eveaton & Goodhill, the synapses in the vestibular 'sub- labyrinth to the cerebral cortex 1968). So dizziness could be due to system' in the central nervous system (temporal lobe and post-central activation of both nor-epinephrine with the co-existence of more than gyrus) leads to dizziness. Nystagmus arid cholinergic reticular areas. one neurotransmitter ir~ a single is the most important manifestation Moreover, the irtterplay between the neurone, multiple pre and post- of vestibular disease. quick-disfiharing and slow-dis- sylxaptic receptors, fast and slow post- charging reticular neurones and synaptic potentials, omnopause neu- Referring to Fig. 1, one can see vestibular nuclei is important (Ghosh rones, reciprocal neuronal units and t[-,at the fibres from the labyrinth and Sen, 1970 ; Ghosh, 1980, 1981). action at sites distant from that of end in the vestibular nuclei and from DizziI).ess would occur when acetyl- release of the transmitters er~ormous- there they relay in the reticular core, choline activation exceeds the capa- ly multiply the problems of assigning eye nuclei (III, IV and VI), dmsa! city of nor-epinephrine system. distir~ct functions to different neuro- nucI.eus of vagus, vomiting centre These are also under the regulation nes and neuropeptides. It has been and chemoreceptor trigger zone, of the inhibitory effects of GABA. electronyst agmographically shown cerebellum (ftoccu]o-nodular lobe that affectiorL of quick and slow- and fastigial nuclei) and temporo- discharging neuronal units in the parietal lobes of cerebral cortex. Habituation to motioal is due to paraxnedian pomine reticular forma- Some fibres (mossy fibres) go directly an enhanced respolLse of the nor- tion are associated with different from the labyrinth via the juxtare- epirLephrine mediated system. The distinct findings on the electronysta- stiform body to the cerebel!um. increased orgalfisation of the neural tagmograph (Ghosh & Kacker, Conversely, cerebral and cerebellar system or mobilization of the enzy- 1979; Ghosh, 1980 & 1981). The fibres converge on the vestibular mes lxecessary for increased nor- psychological aspect of the patient nuclei exertirLg an inhibitory influ- epinephrine activity would be acti- complicates it further. ence. Damage to these enhances vated by repeated exposure to vestibular responses (Ghosh & motion (Wood & Graybiel, 1970, As a clinician, this is a humble Kacker, 1979). 1973). This would alter the balance attempt at recovering from the of activity in the central nervous The neurot~ansmitters, associated system and prevent motion sickness P. Ghosh, Additional Professor, Department of ENT, with vestibular mechanism, are nor- by allowing nor-epiuephrine system All India Institute of Medical Sciences, adrenaline, acety]cho]ine & Gamma to predominate over the acetylcho- New Delhi-110 029, INDIA, Amino Butyric Acid (Fig. 1). Vesti- line system. For the nervous system (formerly, Lecturer in ENT, Faculty of to recalibrate the relationship bet- l~,ledicine, University of Papua New Guinea). bular receptors are cllolinergic. It M. S. Rohatgi, is likely that a cholilzergic transmis- ween visual, proprioceptive and Specialist Ear, Nose and Throat Surgeon, sion to the vestibular neurones cause vestibular sigI~als, repeated head and P.O. Box-228, Maitand vertigo. The cbolinergic reticuIo- eye movemeI~.ts are essential. If the N. S. W. 2320, AUSTRALIA. vestibular pathways enhance the level of nor-epinephrine activity is Reprints request to : activity witl~in the vestibulo-ocular raised by drugs or habituation, or Dr. P. Ghosh, D-34, Ansari Nagar, reflex. The mono-aminergic reticulo- if acetylcholine activity is blocked New Delhi-110029 vestibular pathways activated by by drugs, motion sickness may be India. amphetamine, has an inhibitory in- prevented. 48 Indian Journal of Otolaryngology, Volume 41, No. 2, June, 1989 Won-surgical Treatment of Vertigo--Ghosh & Rohatgi Material and Methods and PUTATIVE SITES OF ACTION OF ANTIVERTIGINOUS observations DRUGS One hundred cases of vertigo were studied and managed non-surgically. CORTEX The aetiologies were as follows : Group I : Cervical spine trauma sustained 1-2 years back. The age group was between 20-35 years. There were 50 cases. HYPOTHAL Group II : Cervical spondylosis : most of the 25 cases were above 45 years. Group III: Cupulolithiasis-- 3 cases. Group IV : Vertebro-basilar insufficiency--9 cases. Group V : Perilymphatic fistula GABA in the round window--2 cases. PYRDOXINE I Fistulae were closed with fat graft. 9 Mild vertigo persisted for about 3 months and subsequently treated with drugs for 3 months. Group V1 : Undiasnosed : 11 cases. Age range was 45 to 60 years. Since facilities for conducting elec- trooculography or optokinetic nys- tagmography are not available in many institutions, reasonable diag- nosis can be and were made by the following : LOWER 1. History. CENTRES 2. Presence and character of spon- taneous nystagmus. 5, 7 LABYRINTH 3. Kopfschuttel (head-shaking) nys- 8 tagmus. 4. Unterberger's test (stepping with hands clasped infront). BLO04 ' SUPPLY I. -- ANTIHISTAMINE~ 5. Positional test. 2. -- ANTIEMETIC PHENOTH|A~|NES 6. Audiometry. / 3. ~ ANTICHOLINEH~'.~'ICS ~ 4' 7. Cold caloric test with ice-cold 3a -- ADR[NERGIC water. 4. -- VASOD|LATOR$ 8. X-ray cervical spines, internal S* __ DIURETICS 6. -- PSYCHOTHERAPEUTI¢ PRUGS auditory meatus and skull, when 7. -- STEROIDS indicated. 8, ~ ANT|BACTERIAL I* GASA Fig. I. VG - Vestibular ganglion, VN - Vestibular nuclei, RF - Reticular formation, Table I represents the anamnesia, Supprn - Supperssion, NA - Nor-adrenaline, ACtt - Acetylcholine Activa - Activation, CTZ - chemoreceptor Trigger Zone, VC- Vomiting centre, GABA- GammaAmino Butyric which has been tabulated taking the Acid, MR - Med, Rectus, LR - Lateral rectus, Ant - Anterior, Post - Posterior, III& VI-Eye help of available literature and per- nuclei, Fasti - Fastigious nucleus. sonal experience, is helpful in differ- ential diagnosis. In quite a good number of eases, history alone could sient numbness and tingling of face, Spontaneous nystagmus was look- point to tlxe proper diagnosis. In the especially in the periora] region. ed for in sitting and head-erect group with vertebro-basilar insuffi- None of the cases showed any neu- position. This was present in 5 cases ciency, the patients had only tran- rological deficit. of cervical spine trauma, 2 cases of Indian Journal of Otolaryngology, Volume 41, No. 2, June, 1989 49 °Volt-surgical Treatment of Vertigo--Ghosh & Rohatgi TABLE I Dizziness (aetlology and site of pathology; of sudden onset t hronlc Below 50 yrs. of age Above 50 yrs. Episodic Non-episodic D,'ithout cochlear \Vith eochh:ar a) vascular disorders With cochlear Without cochlear I. A~oeiated with symptoms symptoms involving lab) rin- symptoms symptoms fainting or uncon- (a) vestibular (a~ Viral labyrinthiti,. thine blood flow (a) CSO.XIand 1. Positional : scionsness :-- neuronitis ,>f (common) from the vertebro- mastoiditis. (:t~ Cupulolithiasis (a) V. B. insufficiency bacterial, vir~d (b) Bacterial tabvrin- basi!ar system. (b) M~eniere's (BPPV) (T.I.A.) or metabolic thitis (rare) b) Strokes :-cerebral, disease, (Idiopathic, fi)llow- (b) Epilepsy origin. (el Meningitis brain-stem and syphilis and ing head injury & (c) Orthostatic hypo- (b) Tabes dor,ali~. (d/ May follow : cerebellar. Cogan's cfisease vascular episodes tension. (i) Physical activity ~c) Arteriosclerosis. (c Acoustic involving the (d) Carotid arterio- e.g., extreme :d) Hypertensive neurinoma & anterior vestibular sclerosisann carotid exertion,