PSB3002.Stehouwer.3.30.16 - Vestibular Part 2 Start of Exam...

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3/30/16 Vestibular Part 2 Start of Exam 4 Vestibular Pathways and their Functions Important for stabilizing gaze o Faster than vision Helps maintain upright posture though spinal accessory nucleus Vestibular nuclei to cerebellum o Posture, equilibrium Vestibular nuclei to nuclei of CN III, IV & VI (short, fast disynaptic pathway) o Vestibular nystagmus o Capable of adaptation (plasticity) Vestibulospinal tract o Resting postural muscle tone o Postural reflexes Vestibular nuclei to nucleus of CN XI o Righting reflex, tonic neck reflexes Sensory Systems 3: Somatosensory Systems. Cutaneous- external stimulus Proprioceptive- internal stimulus Adequate Stimulus: o Thermal (infrared radiation, contact) o Touch(light touch, pressure, vibration) o Pain and Itch (chemical, thermal, mechanical) Mechanical= pierces skin Come from same receptors o Proprioception (mechanical; stretch or pressure) Cutaneous Subsystem Epicritic- nonpainful (non-noxious/unpleasant) o Location o
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  • Spring '13
  • DavidSmith
  • Vestibular nuclei

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