Vestibular System 前庭系統
Where:
Vestibilar organs are situated in the inner ears next to the hearing organ (Cochlear).
What:
The structure composed of the utricle, saccule (to detect linear acceleration, e.g going forward,/ backwark; up/down); and the three semicircular ducts (to detect angular acceleration, e.g. spinning, turning head, nodding head)
Responsible for:
- Balance
- Muscle tone
- Spatial Sense (where you are in space)
- Head orientation
- Gaze stabilization (can't read if poor)
- Motor coordination
- Eye hand / eye foot coordination
- "Feel" where you are
Responsible for reflex development
- Vestibular Ocular Reflex (for gaze stabilization when moving, reading)
- Vestibulospinal Reflex (to stabilize head and control erect stance in relation to gravity, under static and dynamic conditions)
- Vestibular Collic reflex (righting reflex) (to maintain head horizontal gaze position in relative to gravity, independent of trunk movement; stabilize head in space)
- Moro reflex
- Tonic neck reflex (ATNR) (integrate at 3-4 months)
- head righting reflex (TLR)
- Positive support reaction
- Parachute reflex
Disorders of the vestibular system
- Developmental delays
- Motor disco-ordination
- Postural abnormalities
- Balance problems
- Poor spatial perception
- Reading problems
- Learning disabilities
- ear pain
- stomach pain
- headache
- visual disturbance
- vegetative symptoms
- walk to 1 side
- delay development
- presyncopal feeling
- anxiety with hyper ventilation
- learning disabilities
- dizziness
- visual acuity problems
- poor spatial relationship (skip workds / letters when reading, disorganized writing)
- nystamus
- difficulty in dark
- hearing loss
- motion sickness
- nausea
- abnormal movement pattern, unsteady gait, clumsiness, poor posture, decrease eye hand/foot coordiantion
- headache wit nausea/dizziness
- couldn't ride bicycle, swimming, hopping, walking stair
Cause
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