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       (PATH "gifs/Syllabus Chapters/SomatoMedlem/toon.ML.gif"))
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(FRAME-INFO (STRING "Objectives. Review somatosensory receptors. Learn the tracts involved in conveying fine touch, vibration and proprioceptive information from the body \(the medial lemniscus-dorsal column pathway\) and face \(trigeminal lemniscus\) to the primary somatosensory cortex in the postcentral gyrus. The somatosensory pathways can be thought of as a chain of three neurons. The first neuron carries information from the receptor into the central nervous system. The second neuron usually has an axon that crosses the midline and ascends to the thalamus, and the third neuron projects from the thalamus to the somatosensory cortex. Learn, for each of the three neurons in the chain from periphery to cerebral cortex, the name and location of both the nuclei and the tracts formed by their axons.  Understand the somatotopic order of fibers in the medial lemniscus. Know where the second neuron in the chain crosses the midline.  Recognize the somatosensory nuclei and tracts at different cross sectional levels. Know the organization of the \"sensory homunculus\" in the primary somatosensory cortex. "))
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        (ACTION "main sensory trigeminal nucleus")
        (ID 6)
        (CENTER-PT (298 168))
        (COORD-LIST (294 160) (290 162) (289 167) (290 172) (295 175) (300 176) (305 176) (310 174) (312 170) (313 166) (312 162) (308 159) (304 158) (300 158) (296 159) (294 160)))

(REGION (TYPE "STRUCT")
        (ACTION "gracile and cuneate nuclei")
        (ID 5)
        (CENTER-PT (297 198))
        (COORD-LIST (288 195) (288 200) (291 205) (295 210) (300 212) (305 213) (310 212) (315 209) (317 205) (317 201) (314 197) (310 194) (306 191) (302 190) (298 189) (294 189) (290 190) (286 192) (288 195)))

(REGION (TYPE "STRUCT")
        (ACTION "ventral posterior nucleus of thalamus")
        (ID 4)
        (CENTER-PT (217 102))
        (COORD-LIST (203 94) (199 97) (197 102) (196 107) (196 112) (201 117) (206 118) (211 119) (216 120) (221 120) (226 120) (231 118) (234 114) (235 110) (237 106) (236 102) (233 97) (229 95) (225 93) (221 91) (217 91) (213 90) (209 88) (205 88) (203 94)))

(REGION (TYPE "STRUCT")
        (ACTION "medial lemniscus")
        (ID 3)
        (CENTER-PT (214 172))
        (COORD-LIST (206 119) (206 207) (226 207) (226 119)))

(REGION (TYPE "STRUCT")
        (ACTION "posterior column")
        (ID 2)
        (CENTER-PT (309 256))
        (COORD-LIST (298 212) (298 295) (324 295) (324 212)))

(REGION (TYPE "STRUCT")
        (ACTION "internal capsule")
        (ID 1)
        (CENTER-PT (215 44))
        (COORD-LIST (209 23) (209 68) (222 68) (222 23)))