title: Cobalt sulphide staining of optic fibres in the brain of the cricket, Gryllus campestris.
abstract: Neuronal projections from one optic lobe to other parts of the brain were stained in the cricket Gryllus campestris using the cobalt sulphide technique and Timm's sulphide-silver method. The results are: Four tracts directly connect the medulla with the lobula and medulla of the contralateral optic lobe. Direct medullar projections end mainly in the non-glomerular neuropile of the protocerebrum, but also penetrate the calyx of the mushroom bodies, pons and central body in small numbers. A few somata which send fibres into the medulla lie in the pars intercerebralis, in the protocerebrum ventral to the opposite beta-lobe, the outer margin of the medulla of the contralateral optic lobe and between deuto- and tritocerebrum. The anatomical and physiological relevance of the stained connections is discussed.
mesh_terms: D000818:Animals; D003035:Cobalt; D008297:Male; D009899:Optic Lobe, Nonmammalian / Q000033:anatomy & histology*; D009987:Orthoptera / Q000033:anatomy & histology*; D011149:Pons / Q000033:anatomy & histology; D012834:Silver; D013194:Staining and Labeling; D013440:Sulfides; D014795:Visual Pathways / Q000033:anatomy & histology*
chemical_list: D013440:Sulfides; D003035:Cobalt; D012834:Silver