04.08 - The Somatic Motor System Information from the CNS...

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Unformatted text preview: The Somatic Motor System Information from the CNS to the PNS Somato-Sensory Stimulus Auditory Stimulus Vestibular System Gustatory Stimulus Proprioception! Discriminatory touch Visual Stimulus Olfactory Stimulus Sensory! Cortex Nociception Spinal! Cord! Interneurons Reticular! Formation Medulla Midbrain Cerebellum Thalamus Basal! Ganglia Pre-! Motor! Cortex Primary! Motor! Cortex Motor Response Cerebellum to Basal Ganglia to Limbic System Hypothalamus Somato-Sensory Stimulus Auditory Stimulus Vestibular System Gustatory Stimulus Amygdala Limbic! System Visual Stimulus Hippocampus Pre-! Frontal! Cortex Frontal! Cortex Olfactory Stimulus Sensory! Cortex Nociception Spinal! Cord! Interneurons Reticular! Formation Pre-! Motor! Cortex Primary! Motor! Cortex Proprioception! Discriminatory touch Medulla Midbrain Cerebellum Thalamus Basal! Ganglia Motor Response Upper motor systems Motor Cortex Basal Ganglia Brainstem Cerebellum Lower motor neurons muscles sensory input Vestibulo-Ocular Reflex The Somatic Motor System • Muscles: • Skeletal • Smooth (enteric-vascular) • Cardiac • and their innervation Myosin head Calcium Troponin ATP Tropomyosin Calcium Ion nears troponin Calcium binds troponin which moves exposing site Calcium binds troponin which moves exposing site Magnesium binds myosin ATP is cleaved Magnesium binds myosin ATP is cleaved Magnesium and ADP leave myosin head changes conformation ...
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04.08 - The Somatic Motor System Information from the CNS...

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