Central Nervous System Synapses in Cell Culture P. G. Nelson 359 Synapse Formation and Neurotrophic Effects on Muscle Cell Lines Y. Kido- koro, S. Heinemann, D. Schubert, B. L. Brandt and F. G. Klier 373 Biochemical Studies on the Development of Primary Sympathetic Neurons in Cell Culture P. H. Patterson, L. F. Reichardt and L. L. Y. Chun 389 Physiological and Morphological Studies on Developing Sympathetic Neurons in Dissociated Cell Culture P. H. O'Lague, P. R. MacLeish, C. A. Nurse, P. Claude, E. J. Furshpan and D. D. Potter 399 The Formation of Neuromuscular Synapses M. R. Bennett and A. G. Pettigrew 409 Formation and Elimination of Synapses in Skeletal Muscles of Rat J. K. S. Jansen, D. C. Van Essen and M. C. Brown 425 Physiological Properties of Nerve-Muscle Junctions Developing In Vivo M. J. Dennis and C. A. Ort 435 Cell Junctions in Development, with Particular Reference to the Neural Tube J.-P. Revel and S. S. Brown 443 LONG-TERM CHANGES AND SPECIFICITY OF CONNECTIONS Responses of Spinal Motor Neurons to Section and Restoration of Peripheral Motor Connections M. Kuno 457 A Common Presynaptic Locus for the Synaptic Changes Underlying Short-term Habituation and Sensitization of the Gill-withdrawal Reflex in Aplysia E. R. Kandel, M. Brunelli, J. Byrne and V. Castellucci 465 Modification and Regeneration of Synaptic Connections in Cultured Leech Ganglia S. Miyazaki, J. G. Nicholls and B. G. Wallace 483 Repair of Specific Neuronal Pathways in the Leech D. Van Essen and J. K. S. Jansen 495 Topographic Polarity of the Optic Tectum Studied by Reimplantation of the Tectal Tissue in Adult Goldfish M. G. Yoon 503 RETINA AND VISUAL SYSTEM Ultrastructural Analysis of Functional Changes in the Synaptic Endings of Turtle Cone Cells S. F. Schaeffer and E. Raviola 521 Transmission of Signals from Photoreceptors of Ganglion Cells in the Eye of the Turtle D. A. Baylor and R. Fettiplace 529 Synaptic Transmission from Photoreceptors to Bipolar and Horizontal Cells in the Carp Retina A. Kaneko and H. Shimazaki 537 Receptor Coupling in the Toad Retina G. L. Fain, G. H. Gold and J. E. Dowling 547 Signal Transmission from Photoreceptors to Ganglion Cells in the Visual Sys- tem of the Giant Barnacle S. Ozawa, S. Hagiwara, K. Nicolaysen and A. E. Stuart 563 Synaptic Chemistry of Identified Cells in the Vertebrate Retina D. M. K. Lam 571 Functional Architecture of Area 17 in Normal and Monocularly Deprived Ma- caque Monkeys D. H. Hubel, T. N. Wiesel and S. LeVay 581 The Functional Organization of Projections from Striate to Prestriate Visual Cortex in the Rhesus Monkey S. M. Zeki 591 Synaptic Competition in the Kitten's Visual Cortex C. Blakemore, R. C. Van Sluyters and J. A. Movshon 601 Adaptive Synaptic Connections Formed in the Visual Pathways in Response to Congenitally Aberrant Inputs R. W. Guillery and V. A. Casagrande 611 MODEL SYSTEMS Basilar Membrane Motion G. Zweig 619 Nonlinear Interactions Underlying Visual Orientation Behavior of the Fly T. Poggio and W. Reichardt 635 Analyzing Natural Images: A Computational Theory of Texture Vision D. Marr 647 Peripheral Feedback in the Leech Swimming Rhythm W. B. Kristan, Jr. and G. S. Stent 663 SUMMARY The Synapse C. F. Stevens 675
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