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MEDS 371, Systems Neuroscience Central Somatosensory System Dr. D. O. Kim

MEDS 371, Systems Neuroscience Central Somatosensory System Dr. D. O. Kim. dorsal root gang. dorsal root. ventral root. Purves Fig 16-10. Purves Fig A-4. spinal nerve. * somatotopic organization :. topographic representation of the body in the nervous system. * dermatomes:.

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MEDS 371, Systems Neuroscience Central Somatosensory System Dr. D. O. Kim

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  1. MEDS 371, Systems Neuroscience Central Somatosensory System Dr. D. O. Kim

  2. dorsal root gang. dorsal root ventral root Purves Fig 16-10

  3. Purves Fig A-4 spinal nerve

  4. * somatotopic organization: topographic representation of the body in the nervous system * dermatomes: an area of skin that is mainly supplied by a single spinal nerve Also, think of cochleotopic (tonotopic) and retinotopic organizations.

  5. dermatomes Purves Box 9A

  6. touch pain spinal cord Purves Fig 9-1

  7. The dorsal-column medial-lemniscus pathway dorsal column nuclei medial lemniscus dorsal col.

  8. The dorsal-column medial-lemniscus pathway Purves

  9. discriminative somatosensory pathway for face midbrain pons Purves Figure 9-8

  10. propriorceptive processing; spino-cerebellar cuneo-cerebellar pathways Lumbar & Thoracic spinal cord Purves Fig 9-9

  11. Propriorceptive inputs to cerebellum cortex Purves Fig 19-3

  12. Purves Fig 9-11

  13. homonculus Purves Fig 9-11

  14. where-stream: tactile localization “LOC” what-stream: tactile object recognition “TOR” Reed et al 2005

  15. neural plasticity: ability of the nervous system to reorganize in response to learning or injury

  16. A monkey was trained 1 hour daily where digits 2 and 3, and occasionally digit 4, were heavily used for several months. Purves, Fig. 9-15, adapted from Jenkins et al., 1990

  17. Magnetoencephalographic measures in humans D1: 1-st digit D5: 5-th digit Elbert et al., 1995

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