《耳鼻喉科学 Otolaryngology》课程教学课件（PPT讲稿）Ear_6.Assessment of Vestibular Functoins

Assessment of VestibularFunctoins

Assessment of Vestibular Functoins

Two groups A) Clinical TestsB) Laboratory Test

Two groups ◼ A) Clinical Tests ◼ B) Laboratory Test

NystagmusNystagmus is an important sign inevaluation of vestibular system.It isdefinedasinvoluntaryrhythmical,oscillatorymovement of eyes.It may be horizontalvertical,rotatory.It has a slow and a fastcomponent

Nystagmus ◼ Nystagmus is an important sign in evaluation of vestibular system. It is defined as involuntary ,rhythmical,oscillatory movement of eyes.It may be horizontal vertical ,rotatory.It has a slow and a fast component

Evaluation of vestibularfunction

Evaluation of vestibular function

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Balance is a highly integratednetworkvestibular system -rotatory stimulation andlinear accelerationInformationproprioceptive system - information input fromthe feet, ankle, hip, and neckocular system-visual perception of spatialorientation is supplied by thecentral nervous system -integrated theseinformation and translated to fine motormovements

Balance is a highly integrated network ◼ vestibular system -rotatory stimulation and linear acceleration Information ◼ proprioceptive system - information input from the feet, ankle, hip, and neck ◼ ocular system - visual perception of spatial orientation is supplied by the ◼ central nervous system - integrated these information and translated to fine motor movements

Staticbalance testRombergtest:useful in patientswith anacute unilateral labyrinthine lesionMann test: the patient stands heel to toeratherthan withfeet togetherStaticposturography

Static balance test ◼ Romberg test: useful in patients with an acute unilateral labyrinthine lesion ◼ Mann test: the patient stands heel to toe rather than with feet together ◼ Static posturography:

Dynamic balance testDynamic posturographyCo-ordination function test:PointnosetestAlternative movementFinger point

Dynamic balance test ◼ Dynamic posturography ◼ Co-ordination function test: ◼ Point nose test ◼ Alternative movement ◼ Finger point

NystagmusNystagmusSlow phase:hypoactivityQuickphase:hyperactivityDirection:quick movement of eyePlane:horizontal,rotary,verticalDegree:I:quick phasesideII:quick phase side and look forwardIII:quickphaseside,slowphasesideand look forward

Nystagmus ◼ Nystagmus ◼ Slow phase: hypoactivity ◼ Quick phase: hyperactivity ◼ Direction: quick movement of eye ◼ Plane: horizontal, rotary, vertical ◼ Degree: ◼ I: quick phase side ◼ II: quick phase side and look forward ◼ III: quick phase side, slow phase side and look forward

Ocular dysmetria test:Brainstem,orcerebellum lesionSmoothpurpsuittest:Brainstem or cerebellum lesionOptokinetic nystagmusLesion in central never systemGazenystagmusLesion in central nerve system

◼ Ocular dysmetria test: ◼ Brainstem, or cerebellum lesion ◼ Smooth purpsuit test: ◼ Brainstem or cerebellum lesion ◼ Optokinetic nystagmus ◼ Lesion in central never system ◼ Gaze nystagmus ◼ Lesion in central nerve system