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  • Electronic Resource  (3)
  • Accessory oculomotor nuclei  (1)
  • Cytoarchitecture  (1)
  • WGA  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Anatomy and embryology 164 (1982), S. 229-242 
    ISSN: 1432-0568
    Keywords: Lateral reticular nucleus ; Cytoarchitecture ; Cytology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The cytoarchitecture and cytology of the rat lateral reticular nucleus (LRN) was studied in serial sections of paraffin embedded tissue stained with cresyl violet. Cell outlines and nuclear outlines were drawn in the transverse plane and the nucleus was serially reconstructed. The LRN in the rat begins at a point just caudal to the caudal limit of the inferior olivary nucleus and extends to the mid-olivary level. The nucleus can be subdivided into a predominantly small-celled parvocellular division ventrally, a predominantly large-celled magnocellular division dorsomedially, and a subtrigeminal division dorsolaterally containing predominantly medium-sized cells. At rostral levels the nucleus comprises two parts, a medial principal portion and a lateral subtrigeminal division. Measurements of neuronal diameters yielded size distributions which confirmed the predominance of large cells in the magnocellular division, small cells in the parvocellular division and medium-sized cells in the subtrigeminal division. The neurons display multipolar, triangular, piriform and fusiform somata. All types show a range in size from small to large. The larger cells have abundant Nissl bodies which are coarse in nature and voluminous cytoplasm. The smaller cells have poorly developed Nissl bodies and scant amounts of cytoplasm.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Anatomy and embryology 185 (1992), S. 25-37 
    ISSN: 1432-0568
    Keywords: Afferent projections ; HRP ; WGA ; Lateral reticular nucleus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The organization of the afferent projections to the lateral reticular nucleus of the rat was investigated following placement of horseradish peroxidase-conjugated wheatgerm agglutinin into the red nucleus, fastigial nucleus, various levels of the spinal cord or the sensorimotor area of the cerebral cortex. The pattern of distribution of anterogradely labelled profiles visualized with tetramethylbenzidine revealed that the caudal three-fourths of the lateral reticular nucleus received a large, topographically organized projection from the entire length of the contralateral spinal cord. The lateral part of the rostral half of the lateral reticular nucleus received a small projection from the contralateral red nucleus, the dorsal part of the middle third of the nucleus received a diffuse projection from the contralateral fastigial nucleus, and the extreme rostromedial part of the nucleus received a sparse projection from the contralateral cerebral cortex. The dorsal part of the middle third of the lateral reticular nucleus also received a small projection from the ipsilateral cervical spinal cord. The distribution of afferent fibres from different levels of the spinal cord, red nucleus, and fastigial nucleus overlapped substantially in the middle third of the lateral reticular nucleus, whereas the cerebral cortical receiving area was separate. These data suggest that the middle third of the lateral reticular nucleus integrates spinal and supraspinal impulses to the cerebellum, while the rostral part of the nucleus is involved in a separate cerebral cortico-cerebellar pathway.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 58 (1985), S. 368-378 
    ISSN: 1432-1106
    Keywords: Paramedian reticular nucleus ; Accessory oculomotor nuclei ; Superior colliculus ; Motor cortex ; Postural control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Injections of combined lectin-conjugated and unconjugated horseradish peroxidase were made in the dorsal (d) and ventral (v) divisions of the paramedian reticular nucleus (PRN), a precerebellar relay nucleus, of the cat. The origins of supramedullary afferent projections to the PRN were identified in the pons, midbrain and cerebral cortex using the transverse plane of section. The data indicate a segregation of input from a number of sites to the dPRN and vPRN. The interstitial nucleus of Cajal projects bilaterally to the dPRN and predominantly to the ipsilateral side. The vPRN receives only a unilateral projection from the ipsilateral nucleus of Cajal. Major afferent projections to the vPRN arise from the ipsilateral nucleus of Darkschewitsch and the intermediate layer of the contralateral superior colliculus. Neither of these sites projected to the dPRN. The raphe nuclei and medial reticular formation of the pons and midbrain contribute a moderate input to both divisions of the PRN. A moderate bilateral cerebral cortical projection arises from the first somatomotor area (SMI). The ventral coronal and anterior sigmoid gyri project mainly to the dPRN and vPRN respectively. Smaller afferent projections arise from the posterior sigmoid gyri and area 6 of Hassler and Mühs-Clement (1964) in the medial wall of the anterior sigmoid gyrus. Inputs from the accessory oculomotor nuclei, tectal regions and the first somatomotor cortex suggest a role in postural control for the PRN which may underlie its involvement in mediating orthostatic reflexes.
    Type of Medium: Electronic Resource
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