Lecture 16-Wiring of CNS and Somatosensory systems copy

Lecture 16-Wiring of CNS and Somatosensory systems copy -...

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Today’s Lecture Review Brain Somatosensory System and Somatotopy Introduce Motor Pathways Plasticity of Somatotopic Organization How Plasticity of Somatosensory System can Explain Phantom Limb Sensation
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Reflex and Cerebellar Channels
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medulla Somatosensory Lemniscal Channel Somatosensory cortex spinal cord hand region foot region . Cortex . Dorsal root ganglia pons cerebellum midbrain hypothalamus thalamus Pituitary gland Olfactory bulb
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Spinal cord thalamus Somatosensory cortex medulla Dorsal root ganglion
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Spinal cord thalamus Somatosensory cortex medulla Dorsal root ganglion
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Homunculus which means “little man in the brain”
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grey matter mostly cell bodies of neurons white matter mostly myelinated axons Corpus callosum
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Motoneuron innervates muscle fiber Cortiospinal tract Pyramidal decussation
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Motor homunculus
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skin Spinal cord
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