TWO TYPES OF CATECHOLAMINE CONTAINING TERMINALS IN CAT VISUAL CORTEX
نویسندگان
چکیده
منابع مشابه
Spatial frequency maps in cat visual cortex.
Neurons in the primary visual cortex (V1) respond preferentially to stimuli with distinct orientations and spatial frequencies. Although the organization of orientation selectivity has been thoroughly described, the arrangement of spatial frequency (SF) preference in V1 is controversial. Several layouts have been suggested, including laminar, columnar, clustered, pinwheel, and binary (high and ...
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Tissue PO2 was measured in the primary visual cortex of anesthetized, artificially ventilated normovolemic cats to examine tissue oxygenation with respect to depth. The method utilized 1) a chamber designed to maintain cerebrospinal fluid pressure and prevent ambient PO2 from influencing the brain, 2) a microelectrode capable of recording electrical activity as well as local PO2, and 3) recordi...
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TBS (Theta Burst Stimulation) and PBs (Primed Bursts) are among effective tetanic stimulations for induction of LTP in hippocampus. Recent studies have indicated that TBS is effective in LTP induction in layer III synapses of neocortex, only if applied to layer IV. However, the possibility of neocortical LTP induction using PBs, has not yet been investigated. Sensory deprivation greatly influ...
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The role of the visual cortex (areas 17, 18, and 19), with its preponderance of binocular cells, was investigated as a locus important for interocular transfer. Fourteen cats were tested for interocular transfer of a series of brightness and pattern discriminations in a two-choice, positive reinforcement paradigm. Three were controls. Eleven underwent manipulations designed to reduce the number...
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ABSTRACT Background: The brain response to temporal frequencies (TF) has been already reported, but with no study reported for different TF with respect to various spatial frequencies (SF). Materials and Methods: fMRI was performed by 1.5T GE-system in 14 volunteers during checkerboard, with TFs of 4, 6, 8 and 10Hz in low and high SFs of 0.5 and 8cpd. Results: Average percentage BOLD signa...
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ژورنال
عنوان ژورنال: ACTA HISTOCHEMICA ET CYTOCHEMICA
سال: 1985
ISSN: 0044-5991,1347-5800
DOI: 10.1267/ahc.18.323