A Neural Model of First-order and Second-order Motion Perception and Magnocellular Dynamics

A neural model of motion perception simulates psychophysical data. concerning first-order and second-order motion stimuli, including the reversal of perceived motion direction with distance from the stimulus (I display), and data about directional judgments as a function of relative spatial phase or spatial and temporal frequency. Many other second-order motion percepts that have been ascribed to a second non-Fourier processing stream can also be explained in the model by interactions between ON and OFF cells within a single, neurobiologically interpreted magnocellular processing stream. Yet other percepts may be traced to interactions between form and motion processing streams, rather than to processing within multiple motion processing strea.ms. The model hereby explains why monkeys with lesions of the parvocellular layers, but not the magnocellular layers, of the lateral geniculate nucleus (LGN) are capable of detecting the correct direction of second-order motion, why most cells in area MT are sensitive to both first-order and second-order motion, and why after APB injection selectively blocks retinal ON bipolar cells, cortical cells are sensitive only to the motion of a moving bright bar's trailing edge. Magnoccllular LGN cells show relatively transient responses while parvoccllular LGN cells show relatively sustained responses. Correspondingly, the model bases its directional estimates on the outputs of model ON and OFF transient cells that are organized in opponent circuits wherein antagonistic rebounds occur in response to stimmulus offset. Center-surround interactions convert these ON and OFF outpr1ts into responses of lightening and darkening cells that are sensitive both to direct inputs and to rebound responses in their receptive field centers and surrounds. The total pattern of activity increments and decrements is used by subsequent processing stages (spatially short-range filters, competitive interactions, spatially long-range filters, and directional grouping cells) to dntermine the perceived direction of motion

Application of Pretreatments on Banana Slices for Improving Drying Characteristics

The banana slices were subjected to pretreatment solutions for improving drying, physico-chemical and sensory characteristics.  The pretreatments were applied with four different solutions including ascorbic acid, lemon juice, sodium chloride and honey. The banana slices were cut into 5 mm and 7 mm in size, about 120 g banana slice samples were dip in each pretreatment solution for ten min. The banana slice samples were dehydrated in dehydration chamber and dried at temperatures of 60 °C for 12 to 16 hrs. Each sample was observed for physico chemical characteristics such as pH, TSS, vitamin C, total sugar and ash % and sensory analysis of their color, aroma, taste, texture and overall acceptability were observed. The results obtained showed that the banana slices treated with ascorbic acid and honey solution has the highest value of vitamin C. The results obtained for sensory analysis showed the significant difference in aroma, taste, texture and overall acceptability scores recorded for the samples pretreated with honey solutions for ten min. It is concluded from the present study that pretreatment solutions have important role in determining the final quality characteristics of dried banana slices and it has great potential application in food industries. Keywords: Banana; slices; pretreatment; ascorbic acid, honey, drying characteristics; sensory evaluation. DOI: 10.7176/FSQM/103-06 Publication date: December 31st 202

A Neural Model Of High-Level Motion Processing: Line Motion And Formotion Dynamics

The percepts known variously as the line motion illusion, motion induction, and transformational apparent motion have attracted a great deal of experimental interest, since they sensitively probe interactions between preattentive and attentive vision processes. The present article develops a neural model that qualitatively explains essentially all the data reported thus far, and quantitatively simulates key illustrative percepts. The model suggests how these data arise from neural mechanisms of preattentive boundary and surface formation, long-range apparent motion, formmotion interactions, and spatial attention. The boundary and surface formation processes model aspects of the interblob V1 ! interstripe V2 ! V4 and blob V1 ! thin stripe V2 ! V4 cortical processing streams, respectively. The long-range apparent motion process models aspects of the V1 ! MT ! MST processing stream. An interstream V2 ! MT form-motion interaction is proposed to allow the motion processing stream to track ..

Running Head: Neural Dynamics of Formotion Perception

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Lightweight Context Aware Routing in Wireless Sensor Networks for Real Environments

Design and implementation of a WSN (Wireless Sensor Network) that can efficiently work for a longer time period must include identification of the deployment environment context and to conform to the behavior of the sensor nodes. The context information when treated with evaluation factor becomes a process of context awareness and the evaluation factor is called the context attribute. In this paper, we consider the context factor of energy. The paper identifies analyses and evaluates efficiency of two when used in a context aware environment. Furthermore, the study also highlights the strengths and weaknesses of sensor SPIN (Sensor Protocol for Information via Negotiation) and LEACH (Low Energy Adaptive Clustering Hierarchy) protocols with respect to the support for WSN with heavy network traffic conditions. The performance has been evaluated in terms of energy efficiency, data packet transmission, network status, data management, reliability, etc

Running Head: Neural Model of Second-Order Motion Requests for reprints should be sent to:

their valuable assistance in the preparation of the manuscript. A neural model of motion perception simulates psychophysical data concerning rst-order and second-order motion stimuli, including the reversal of perceived motion direction with distance from the stimulus (, display), and data about directional judgments as a function of relative spatial phase or spatial and temporal frequency. Many other second-order motion percepts that have been ascribed to a second non-Fourier processing stream can also be explained in the model by interactions between ON and OFF cells within a single, neurobiologically interpreted magnocellular processing stream. Yet other percepts may be traced to interactions between form and motion processing streams, rather than to processing within multiple motion processing streams. The model hereby explains why monkeys with lesions of of the parvocellular layers, but not the magnocellular layers, of the lateral geniculate nucleus (LGN) are capable of detecting the correct direction o

Ultrasound-Guided Transversus Abdominis Plane Block versus Land Mark Technique in Lower Abdominal Surgery

OBJECTIVE: To determine the efficacy of pain for Ultrasound-Guided Transversus Abdmominis Plane Block versus landmark technique in lower abdominal surgery. METHODOLOGY: This Randomized Control trial study was conducted from July to December 2018 at the Department of Anesthesiology, Peoples Medical University & Hospital Shaheed Benazirabad. The sample techniques were used randomly through envelopes, and the sample size was 120. RESULTS: The study findings revealed that age distribution among L and U groups regarding gender was 70% females 66.7% females. Moreover, for ASA status in the L group, 58.3% of the participants stand in 2-4 ASA status, whereas in the U group, 50% of the participants were in ASA status 1 and 2-4 each. The bilateral block was performed among 85% of the participants in the L group and 96.7% of the participants in the U group. In the surgical procedure in the L group, 15% underwent appendectomy, whereas, in the U group, 28.3% underwent lower c- section. The overall rate of postoperative pain at 60 minutes was observed in 10 women among both groups. Statistically significant results among both groups with a p-value of 0.001. CONCLUSION: Our study results showed that surgeries performed using Ultrasound-Guided Transversus Abdominis Plane Block are more effective with less postoperative analgesia