115_Finalreview

115_Finalreview - 115 Final Exam Review Thursday June 2,...

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115 Final Exam Review Thursday June 2, 2011
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Somatosensory Systems
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Somatosensation pathways Spinothalamic tract Pain and temperature Dorsal column-Medial lemniscal pathway Touch
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Dorsal column pathway Unipolar cell enters dorsal horn Ascends and synapses in the dorsal column nuclei in the medulla Decussates and ascends as the “medial lemniscus” Synapses at the ventral posterior lateral nucleus of the thalamus And synapses at primary sensory cortex
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Spinothalamic pathway Unipolar cell enters dorsal horn Synapse right away in ipsilateral dorsal horn Decussates and ascends Synapses at the ventral posterior lateral nucleus of the thalamus And synapses at primary sensory cortex
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Hearing
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Hearing 1) Outer ear 1) Pinna 2) External ear canal 3) Tympanic membrane 2) Middle ear Ossicles Malleus, Incus, Stapes 3) Inner ear 1) Cochlea 2) Semicircular canals
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Cochlea 3 canals: vestibular, middle, tympanic canals Organ of Corti (in middle canal) Tectorial membrane Basilar membrane Outer & inner hair cells** With sound, stretch-gated K+ channels on stereocilia depolarize cell!
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115_Finalreview - 115 Final Exam Review Thursday June 2,...

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