title: Spiny stellates as cells of origin of association fibres from area 17 to area 18 in the cat's neocortex.
abstract: Neurons in the cat's area 17 were stained in Golgi-like fashion following injection of horseradish peroxidase into area 18. Such staining allows classification of neurons on the basis of dendritic morphology. The types of neurons found in area 17 are: pyramidal cells in layers 2, 3 and 4ab; spiny stellate cells in the lower part of layer 3, and in layer 4ab; and a few pyramidal and spindle cells in layer 5. The axons of the spiny stellate cells are finer than those of pyramidal cells; they give off collaterals in deeper cortical layers and may bifurcate when entering the white matter. Spiny stellates in area 17 do not project to area 19; after injections are made into area 17, these neurons are found neither in area 18 nor in area 19. The spiny stellate cell with a long axon is thus categorized as a projection neuron which takes part in the pathway from area 17 to ipsilateral and contralateral area 18.
mesh_terms: D000818:Animals; D001370:Axonal Transport; D002415:Cats; D002540:Cerebral Cortex / Q000033:anatomy & histology* / Q000166:cytology / Q000502:physiology; D003712:Dendrites / Q000502:physiology; D006735:Horseradish Peroxidase; D009474:Neurons / Q000166:cytology / Q000502:physiology*
chemical_list: D006735:Horseradish Peroxidase