REVIEWS

385. Neuronal Mechanisms of Respiratory Rhythm Generation: An Approach Using In Vitro Preparation
     Hiroshi ONIMARU, Akiko ARATA, and Ikuo HOMMA
     

405. The Cross-Bridge Mechanism Studied by Flash Photolysis of Caged ATP in Skeletal Muscle Fibers
     K. HORIUTI
     

REGULAR PAPERS

417. Desensitization of the GABA_A Receptor Shifts the Dynamic Range of Retinal Horizontal Cells Due to Light and Dark Adaptation
     Fusao KAWAI, Yoshimi KAMIYAMA, and Shiro USUI
     

431. The Differential Involvement of von Willebrand Factor, Fibrinogen and Fibronectin in Acute Experimental Thrombosis in Rat Cerebral and Mesenteric Microvessels
     Junichiro YAMAMOTO, Izumi ISHII, Nahoko OKITA, Yasuto SASAKI, Tsutomu YAMASHITA, Akira MATSUOKA, Toshiaki MURAKI, John C. GIDDINGS , Sadahiro WATANABE, and Junji SEKI
     

443. An In Vitro Brainstem-Heart Preparation of the Neonatal Rat with Intact Right Vagus Nerve
     Akira AOUDA, Fumiaki HAYASHI, Yasuichiro FUKUDA, and Yoshiaki MASUDA
     

449. Functional Organization of Chromaffin Cells and Cholinergic Synaptic Transmission in Rat Adrenal Medulla
     Riichi KAJIWARA, Olav SAND, Yoshiaki KIDOKORO, Michael E. BARISH, and Toshio IIJIMA
     

465. Comparison of Exhaled Nitric Oxide and Cardiorespiratory Indices between Nasal and Oral Breathing during Submaximal Exercise in Humans
     Yoshifumi YASUDA, Tomonori ITOH, Miharu MIYAMURA, and Hitoo NISHINO
     

SHORT COMMUNICATIONS

471. Effects of Spaceflight on Enzyme Activities and Ultrastructure of Fast-Type Skeletal Muscles of Rats
     Toshitada YOSHIOKA, Katsumasa YAMASHITA-GOTO, Osamu TANAKA, Hiroshi UCHIDA, Midori KIMURA, Kazuhiko FUJITA, Chiharu SEKIGUCHI, and Syunji NAGAOKA
     

477. Effects of Nitric Oxide Synthase Inhibition on Phospholipid Fatty Acid Composition of Brown Adipose Tissue
     Shyamal Kumar SAHA, Tomie OHNO, Hiroshi OHINATA, and Akihiro KUROSHIMA
     

481. The Maximal Lactate Steady State in Elite Endurance Athletes
     A. R. HOOGEVEEN, J. HOOGSTEEN, and G. SCHEP