Summary
Few synaptic boutons with the typical changes of “electron-dense degeneration” were found in the nucleus of the oculomotor nerve of cats, which underwent complete bilateral ablation of the cerebellum. The degenerating boutons were mainly found in the neuropil, contacting small dendritic profiles. For the scanty number of degenerating boutons observed and for the patticular location of its terminal boutons, the direct cerebello-oculomotor connection appears to be an ancillary route in the cerebello-oculomotor linkage, which involves mainly polysynaptic routes.
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References
Bender MB, Shanzer S (1964) Oculomotor pathways defined by electric stimulation and lesions in the brainstem of monkey. In: Bender MB (ed) The oculomotor system. Hoeber Harper and Row New York
Carpenter MB, Strominger NL (1964) Cerebello-oculomotor fibres in the rhesus monkey. J Comp Neurol 123:211–230
Chan-Palay V (1977) Cerebellar dentate nucleus. Springer Verlag Berlin
Cohen D, Chambers WW, Sprague JM (1958) Experimental study of the efferent projections from the cerebellar nuclei to the brain stem of the cat. J Comp Neurol 109:233–259
Dow RS, Manni E (1964) The relationship of the cerebellum to extraocular movements. In: Bender MB (ed) The oculomotor system. Hoeber Harper and Row New York
Gacek RR (1977) Location of brain stem neurons projecting to the oculomotor nucleus in the cat. Exp Neurol 57:725–749
Graybiel AM, Hartwieg EA (1974) Some afferent connections of the oculomotor complex in the cat: An experimental study with tracer techniques. Brain Res 81:543–551
Maciewicz RJ, Kaneko RS, Highstein SM, Baker R (1975) Morphophysiological identification of interneurons in the oculomotor nucleus that project to the abducens nucleus in the cat. Brain Res 96:60–65
Peters A, Palay SL, Webster HdeF (1976) The fine structure of the nervous system: The neurons and supporting cells. WB Saunders Company Philadelphia-London-Toronto
Rall W (1967) Distinguishing theoretical synaptic potentials computed for different soma-dendritic distributions of synaptic input. J Neurophysiol 30:1138–1168
Ranson SW, Ingram WR (1932) The diencephalic course and termination of the medial lemniscus and brachium conjunctivum. J Comp Neurol 56:257–275
Ritchie L (1976) Effects of cerebellar lesions on saccadic eye movements. J. Neurophysiol 39:1246–1256
Ron S, Ribinson DA (1973) Eye movements evoked by cerebellar stimulation in the alert monkey. J Neurophysiol 36:1004–1022
Sotelo C, Palay SL (1971) Altered axons and axon terminals in the lateral vestibular nucleus of the rat. Possible example of axonal remodelling. Lab Invest 25:653–671
Tredici G, Pizzini G, Miani A (1976a) Evidence of monosynaptic cortico-oculomotor nucleus fibers? An experimental electron microscopic study. J Submicr Cytol 8:41–50
Tredici G, Pizzini G, Milanesi (1976b) The ultrastructure of the nucleus of the oculomotor nerve (somatic efferent portion) of the cat. Anat Embryol 149:323–346
Tredici G, Pizzini G, Miani A (1977) Cortico- and cerebello-rubral projections in the cat. Acta Anat 99:320
Warwick R (1964) Oculomotor organization. In: Bender MB (ed) The oculomotor system. Hoeber Harper and Row New York
Westheimer G, Blair SM (1974) Functional organization of primate oculomotor system revealed by cerebellectomy. Exp Brain Res 21:463–472
Westrum LE (1973) Early forms of terminal degeneration in the spinal trigeminal nucleus following rhizotomy. J Neurocytol 2:189–215
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Tredici, G., Pizzini, G., Ventura, R.G. et al. Electron microscopic demonstration of cerebello-oculomotor fibres in cat. Anat Embryol 161, 1–8 (1980). https://doi.org/10.1007/BF00304664
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DOI: https://doi.org/10.1007/BF00304664