The Third Medical Conference Sponsored by the Muscular Dystrophy Associations of America，Inc．Opening addressees．＆ADE T．MILHORAT，M．D．，AND JOSEPH C．HINSEY，PH．D 3

A SYMPOSIUM．Recent Advances in Basic Muscle Chemistry，Physiology，and Pharmacology．＆WALLACE O．FENN，PH．D．，Chairman 8

The Proteins of Muscle and Their Participation in the Process of Contraction．＆W．F．H．M．MOMMAERTS，PH．D 11

Value of Models for Understanding of Muscular Contraction．＆ANNEMARIE WEBER，M．D 19

Mechanisms of Impulse Transmission across Neuromuscular Junctions．＆DAVID NACHMANSOHN，M．D 33

Modern Concepts of Structure of Striated Muscle．＆H．STANLEY BENNETT，M．D 46

Relation of Mitochondria to Enzymic Processes in Muscle．＆JOHN W．HARMAN，M．D 68

Muscle Electrolytes．＆GILBERTLING，PH．D 89

A SYMPOSIUM．Clinical Management of Patients．＆JOHN B．GRIGGS，M．D．，Chairman 102

The Diagnosis of Muscular Dystrophy．＆ADE．T．MILHORAT，M．D 103

Physical Medicine and Rehabilitation：Its Value and Limitations in Progressive Muscular Dystrophy．＆MORTON HOBERMAN，M．D 109

Participation of the Family and Patient in a Program of Rehabilitation．＆ELLZABETH AUSTIN，M．D 116

Emotional Reactions in Muscular Dystrophy．＆MARIE-LOUISE SCHOELLY，M．D．，AND ALAN W．FRASER，M．D 119

Personal and Social Adjustments of Children with Muscular Dystrophy．＆CLEON JOHNSON TRUITT，M．A 124

Assessment of Drugs for Therapeutic Efficacy．＆JANET TRAVELL，M．D 129

Symposium on Clinical Management of Patients，General Discussion 141

A SYMPOSIUM．Contracture of Muscle．＆HERBERT S．GASSER，M．D．，Chairman 143

Contracture Responses of Skeletal Muscle．＆ALEXANDER SANDOW，PH．D 145

Contractures at the Nerve-Muscle Junction：the Slow Muscle Fiber System．＆STEPHEN W．KUFFLER，M．D 161

Medical Management of Contractures in Muscular Dystrophy．＆W．D．PAUL，M．D 172

Symposium on Contracture of Muscle，General Discussion 180

A Study of Contractions of Skeletal Muscle Myofibrils by Phase Microscopy，Motion Picture Demonstration．＆JOHN W．HARMAN，M．D．，AND HOMER C．MONTAGUE 182

Recording Progressive Muscular Dystrophy by Split-Frame Cinematography．＆P．PLATO SCHWARTZ，M．D．，KARL E．MASON，PH．D．，AND TYLER TINKER 183

The Wulzen Calcium Dystrophy Syndrome in Guinea-Pigs．＆HUGO KRUEGER，PH．D 185

A SYMPOSIUM．Degeneration，Regeneration，and Growth of Muscle．＆D．DENNY-BROWN，M．D．，Chairman 210

Changes in Protein and Enzymes in Muscular Degeneration Subsequent to Denervation．＆ERNST FISCHER，M．D 212

Degeneration and Regeneration in Experimental Muscular Dystrophy．＆WILLIAM．T．WEST，B．A．，AND KARL E．MASON，PH．D 223

Degeneration and Regeneration in the Muscles of Cortisone-Treated Rabbits．＆JOHN T．ELLIS，M．D 240

Cellular and Chemical Components in the Growth of Embryonic Muscle Tissue．＆HEINZ HERRMANN，M．D 244

Symposium on Degeneration，Regeneration，and Growth of Muscle，General Discussion 251

A SYMPOSIUM．MDAA Chapters and the Patient Service Program．＆ARTHUR S．ABRAMSON，M．D．，F．A．C．P．，Chairman 257

A Psychiatric Study of Muscular Dystrophy．The Role of the Social Worker．＆THOMAS F．HENLEY，M．D．，AND BERTHA ALBAM，M．S 258

The Need for Patient Service Programs in Muscular Dystrophy．＆MORTON D．SCHWEITZER，PH．D 265

Community Services in the Patient Service Program．＆VERA M．BURKE，PH．D 269

Symposium on MDAAA Chapters and the Patient Service Program，General Discussion 274

A SYMPOSIUM．Recent Advances in Knowledge of Metabolic Alterations in Muscular Dystrophy．＆RALPH W．GERARD，PH．D．，M．D．，D．SC．，Chairman 279

Electrolyte and Endocrine Studies in Muscular Dystrophy．＆T．S．DANOWSKI，M．D 281

Metabolic Exchange of Human Muscle in Situ．＆REUBIN ANDRES，M．D．，GORDON CADER，M．D．，AND KENNETH L．ZIERLER，M．D 286

Metabolism of Glycogen in Experimental Muscular Dystrophy．＆ANNE E．MILMAN，PH．D 291

Effect of Hormones on Muscle Glycogenolysis in Hypophysectomised Animals．＆SAMUEL L．LEONARD，PH．D 297

A Study of Adrenocortical and Testicular Physiology in Dystrophia Myotonica．A Preliminary Report．＆A．KAPPAS，M．D．，A．T．MILHORAT，M．D．，C．P．RHOADS，M．D．，AND T．F．GALLAGHER，PH．D 303

Pentosuria in Neuromuscular Disorders．＆ARTHUR L．DERW，M．D 303

Pentosuria in Neuromuscular Disorders．＆ARTHUR L．DREW，M．D 309

Glycogenolytic Enzymes in Human Progressive Muscular Dystrophy．＆GEORGES SCHARIRA，M．D．，PH．D．，JEAN-CLAUDE DREYFUS，M．D．，PH．D．，FANNY SCHAPIRA，M．D．，AND JACQUES KRUH，M．D．，PH．D 313

Alterations in Oxidative Metabolism in Experimental Muscular Dystrophy．＆I．M．WEINSTOCK，PH．D 320