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Block 12 Posture and balance

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klau253's version from 2017-05-28 18:18

Section

Ventromedial pathways (descending tracts) and their origin (all end in ventral horn of SC)
Question Answer
Vestibulospinalvestibular nuclei in medulla
Tectospinalsup. colliculus in midbrain
Pontine recticulospinalpontine recticular formation
Medullary reticulospinalmedullary reticular formation
memorize

 

Otolith organs
Question Answer
Fxndetect force of gravity and tilts of head
Utriclehorizontal macula, kinocilia twd striola
Sacculevertical macula, kinocilia away from striola
Directional hair cellsdepol --> bend hair cell twd kinocilium
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Semicircular canals
Question Answer
Fxnhead rotational movement and angular rotation
Main sensory structureampulla
All ant. post. horizontal canals are filled withendolymph
when angular rotation to Ltcupula will bend to Rt
memorize

 

Disorders of vestibular system and postural control
Question Answer
Meniere's syndromeincrease in endolymph ruptures membranous labyrinth
Benign paroxysmal positional vertigoCaCO3 dislodged from otolith organs, disrupts endolymph flow
Migraine asso/ verticoattacks of vertigo, accompanied by usual migraine symptoms or not
memorize